African Journal of
Environmental Science and Technology

  • Abbreviation: Afr. J. Environ. Sci. Technol.
  • Language: English
  • ISSN: 1996-0786
  • DOI: 10.5897/AJEST
  • Start Year: 2007
  • Published Articles: 1047

AJEST Articles

Challenges of water accessibility in the urban centres of Malawi: A case study of Blantyre City

October 2016

This study assesses challenges of water supply to urban areas of Malawi since factors obstructing water availability, indicators of water service’s delivery, trend of tariff structure and cost recovery’s mechanisms and water governance in Malawi have been poorly assessed in the past despite the fact that the country has engaged itself in the improvement of urban water policy. The study was conducted in...

Author(s): Peter Unique Magombo and Ishmael Bobby Mphangwe Kosamu

Evaluation of fluoride enrichment processes in groundwater of Chimakurthy granitic pluton complex in Prakasam District India

October 2016

Hydrogeochemical evaluation of aquifers belonging to Chimakurthy granitic pluton complex reveals wide spatial and temporal variation in F- distribution. F- concentration in groundwater of different aquifers varies from < 0. 50 to 9.84 mg/l. Among three sampled episodes, the mean value of F- is high in July 2010 and 61% of samples have values above maximum permissible limit as per the Bureau of Indian...

Author(s): A. G. S. Reddy, D. V. Reddy, M. Sudeer Kumar and P. K. Naik

Atmospheric ventilation corridors and coefficients for pollution plume released from an Industrial Facility in Ile-Ife Suburb, Nigeria

October 2016

This study presents a comparative investigation of atmospheric ventilation corridors and coefficients for gaseous pollution plume released from an isolated industrial facility into the ambient air of the host community in Ile-Ife suburb, southwest Nigeria. For the months of September to December in the year 2012 and 2013, measurement of surface layer atmospheric parameters made from an instrumented mast located near the...

Author(s): Abiye O. E., Akinola O. E., Sunmonu L. A., Ajao A. I. and Ayoola M. A.

An evaluation of biogas production from anaerobic digester of a constructed wetland domestic wastewater treatment plant

October 2016

Domestic wastewater treatment using constructed wetlands have been found to be very efficient and cost effective. Primary treatment facilities such as anaerobic digesters have been reported to reduce the organic load of wastewater before entering the constructed wetland systems. It has also been established that biogas is a product of organic matter decomposition under anaerobic condition. In this study, we evaluated...

Author(s): Adelere Ezekiel Adeniran, Adetinuke Aina and Omolaraeni Oshunrinade

A critical analysis of physiochemical properties influencing pit latrine emptying and feacal sludge disposal in Kampala Slums, Uganda

October 2016

Inadequate information on physiochemical properties of faecal sludge leads to inappropriate design of pit emptying devices and poor faecal sludge disposal contributing to environmental pollution. This study undertook a critical analysis of physiochemical properties of feacal sludge that influence design and performance of pit emptying devices and faecal sludge disposal for improved faecal sludge management in urban...

Author(s): Ahamada Zziwa, Maureen Norah Nabulime, Nicholas Kiggundu, Robert Kambugu, Abia Katimbo and Allan John Komakech

Investigating the potability of water from dug wells: A case study of the Bolgatanga Township, Ghana

October 2016

The aim of this study was to assess the levels of some physico-chemical and microbial water quality parameters in fifteen hand-dug wells in Bolgatanga of the Upper East region of Ghana. The effects of seasonal variation and proximity to pollution sources on the concentrations of some parameters of the well water samples were analysed. The results revealed that, total and faecal coliforms in all fifteen samples exceeded...

Author(s): Samuel Kojo Abanyie, Boateng Ampadu and Steve Ampofo

Preliminary investigation of transfer of metals from soil to vegetables: Case study of Spinacia oleracea L.

September 2016

The objective of the study was to measure concentrations of Cu, Ni and Zn in Spinacia oleracea cultivated at a site near the copper and nickel mine in Selebi Phikwe. The mean concentrations (in dry matter-basis) of Cu, Zn and Ni in the whole plant system were 7.30 ± 2.51, 6.02 ± 2.16 and 0.03 ± 0.02, mg/kg, respectively. Enrichment factors (EF) of Cu, Ni and Zn were far below the EF value of 1.5...

Author(s): Mosiamisi Mokgolele and Sello Alfred Likuku

Comparison of community managed projects and conventional approaches in rural water supply of Ethiopia

September 2016

This study aimed to compare Community Managed Projects (CMP) approach with the conventional approaches (Non-CMP) in the case of Ethiopia. The data collection methods include a household survey (n=1806), community representative interviews (n=49), focus group discussions with district water experts (n=48) and observations of water systems (n=49). The data were collected from seven districts of two regions of Ethiopia....

Author(s): Beshah M. Behailu, Arto Suominen, Tapio S. Katko, Harri Mattila and Gashaw Yayehyirad

Geochemical assessment of toxic metals stocking in top-soil within the area of limestone quarry in Gombe of North-eastern Nigeria

September 2016

This work presents an assessment of geochemical toxic metal stocking in top-soil within the area of a limestone quarry in Gombe State. Samples of topsoil from the area of a limestone quarry in Gombe (North-eastern Nigeria) were collected to analyse levels of hazardous substances such as of Hg, Fe, Zn, Ni, Mn, Cu, Cr, Cd and Pb. A total of 24 topsoil samples were collected around the radius of 0.5 km from the blasting...

Author(s): Usman Abdullahi Usman, Prashant Kumar,  Abatcha Babagana Abdulkadir, Hamman Ishaku Kamale, Hamza Maina Sadiq, Dahiru Danjuma Muhammed, Yusuf Ibrahim and Ibrahim Bukar Wulo

Co-composting of sewage sludge and Echinochloa pyramidalis (Lam.) Hitchc. & Chase plant material from a constructed wetland system treating domestic wastewater in Cameroon

September 2016

Trials were conducted at the Cité-Verte domestic wastewater treatment station (Yaoundé-Cameroon) in order to assess the effect of three sewage sludge: Macrophyte ratios on the co-composting process and compost quality. The ratios were T1: 25 kg of plant material (Echinochloa pyramidalis) and 75 kg sludge; T2: 50 kg of plant material and 50 kg sludge, and T3: 75 kg of plant material and 25 kg of sludge. The...

Author(s): Guy Valerie Djumyom Wafo, Pulcherie Matsodoum Nguemte, Wilfried Arsène Letah Nzouebet, Pierre François Djocgoue and Ives Magloire Kengne

The use of magnetic susceptibility measurements to determine pollution of agricultural soils in road proximity

September 2016

This research work presents a study on the application of magnetic susceptibility measurements and geochemical analysis for mapping or assessing heavy metal pollution in the agricultural soil in road proximity. The research work was also done to check any runoff of heavy metals pollution to the Owabi dam which serves as the main water sources to catchment areas and the whole of Kumasi Metropolis. This research work was...

Author(s): Brempong F., Mariam Q. and Preko K.

Modeling sludge accumulation rates in lined pit latrines in slum areas of Kampala City, Uganda

August 2016

Disposal of faecal sludge particularly in slum areas is a difficult undertaking given the lack of space and resources. Inaccurate prediction of sludge accumulation rates (SAR) in pit latrines leads to unplanned pit latrine emptying. Given that the users and owners cannot afford the conventional emptying techniques frequently, inappropriate methods such as open defecation and emptying into storm drainages are employed...

Author(s): Yvonne Lugali, Ahamada Zziwa, Noble Banadda, Joshua Wanyama, Isa Kabenge, Robert Kambugu and Peter Tumutegyereize

Assessment of the effect of effluent discharge from coffee refineries on the quality of river water in South-western Ethiopia

August 2016

The ecohydrological quality of water resource of Ethiopia is declining at an alarming rate, resulting in severe environmental degradation. This study finds out the effects of effluent discharge from intensive coffee refineries on river water quality based on physicochemical parameters and benthos assemblages as biological indicators. The experiment was done using complete randomized design (CRD) with three composite...

Author(s): Tadesse Mosissa Ejeta and Alemayehu Haddis

The analysis of physicochemical characteristics of pig farm seepage and its possible impact on the receiving natural environment

August 2016

Pig farm seepage poses an environmental risk, considering that seepage can be generally applied on land without appropriate agronomic criteria or may accidentally spill on the natural environment. These environmental risks include increasing oxygen demand, nutrient loading of water-bodies, promoting toxic and algal blooms eutrophication, thus, leading to a destabilized environment. This research was conducted to...

Author(s): Dikonketso S. Mofokeng, Rasheed Adeleke, and Olayinka A. Aiyegoro

Statistical analysis of the effects of relative humidity and temperature on radio refractivity over Nigeria using satellite data

July 2016

Meteorological data from the Department of Satellite Application Facility on Climate Monitoring (CM-SAF), DWD Germany have been used to study and investigate the effect of relative humidity and temperature on refractivity in twenty six locations grouped into for climatic regions aloft Nigeria (Coastal, Guinea savannah, Midland and sub Sahelian regions). The four years data collected ranged from 2004 to 2007 and was...

Author(s): Adedayo, K. D.

Key factors affecting performance of biogas latrines in urban informal areas: Case of Kampala and Nairobi, East Africa

July 2016

Large scale application of biogas latrine technology in developing countries faces technical, socio-economic and financial challenges. As a result, harnessing its full potential has not been realized. This study examined variables describing the design, construction, operation and maintenance of nineteen biogas latrines in relation to their performance in Kampala and Nairobi, based on survey and field observations....

Author(s): P. Mutai, C. Niwagaba, JB Tumuhairwe, R. Kulabako, A. Katukiza, P. Nyenje and F. Kansiime

Combined use of Very Low Frequency Electromagnetic (VLF-EM) and electrical resistivity survey for evaluation of groundwater potential of Modomo/Eleweran area, south western Nigeria

July 2016

Very Low Frequency Electromagnetic (VLF-EM) and electrical resistivity surveys were conducted at Modomo/Eleweran, along Ede-road, south western Nigeria, with a view to delineate the hydrogeophysical characterization of the study area. The area is underlain by the Precambrian Basement Complex rocks. The VLF-EM traverses were established along 6 traverses with a station interval of 10 m with lengths ranging from 130 to...

Author(s): S. M. Taiwo, M. O. Awoyemi and G. C. Onyedim

Physicochemical and bacteriological quality assessment of the Bambui community drinking water in the North West Region of Cameroon

June 2016

In order to ascertain water quality for human consumption, physical and chemical parameters, together with faecal forms of bacteria were evaluated in the drinking water resources of the Bambui community in the North West region of Cameroon. This study was necessitated by the occasional presence of suspended particles in the water and typhoid cases recorded in the Bambui community. Samples of tap water collected from...

Author(s): Njoyim Estella Buleng Tamungang, Mofor Nelson Alakeh, Mary Lum Fonteh Niba and Sunjo Jude

Temporal and spatial variability of rainfall distribution and evapotranspiration across altitudinal gradient in the Bilate River Watershed, Southern Ethiopia

June 2016

Rainfall and evapotranspiration are the two major climatic factors affecting agricultural production. This study examined the extent and nature of rainfall variability from measured data while estimation of evapotranspiration was made from recorded weather data.  Analysis of rainfall variability is made by the rainfall anomaly index, coefficient of variance and precipitation concentration index. The FAO-56...

Author(s): Getahun Garedew Wodaje, Zewdu Eshetu and Mekuria Argaw

Assessment of heavy metals concentration in water, soil sediment and biological tissues of the lesser flamingos in four eastern rift valley lakes

June 2016

The term heavy metal refers to any metallic chemical element that has a relatively high density and is toxic at low concentrations. This study was conducted in four eastern Rift Valley lakes which included Lakes Oloidien, Crater, Elementaita and Nakuru, to determine the presence and levels of lead, arsenic, cadmium and chromium concentration in water, soil sediments and biological tissues of the Lesser Flamingos...

Author(s): Tenai B.C, Mbaria J.M, Muchemi G.M, Jansen R., Kotze A, Naidoo V, Kariuki E.K, Nduhiu J.G, Nderitu J.G and Gitau F.K

Heavy metal contamination in stream water and sediments of gold mining areas of South Western Nigeria

May 2016

This study assessed the seasonal variation in heavy metal contamination of stream water and sediments in the gold mining area of Atakunmosa West local Government, Osun State, Nigeria. Twelve villages of prominence in illegal gold mining were selected for the study covering dry and wet seasons of 2012. Stream water and sediment samples were randomly sampled for both seasons. Samples were analyzed with atomic absorption...

Author(s): Makinde Oladotun Wasiu, Oluyemi Emmanuel Ayodele, Tunbosun Isaac Ayodele, Olabanji Iyabo Oluremi, Ogundele Katerine Temitope  and Fakoya Omowumi Temitope

Dredging induced changes in zooplankton community and water quality in Dal Lake, Kashmir, India

May 2016

A study was conducted from July 2013 to June 2014 to assess the outcome of dredging activity on the water characteristics and zooplankton community structure in Dal Lake. An assessment was done with respect to alterations in physico-chemical parameters and zooplankton community changes in pre-dredged and post-dredging periods. The results showed a considerable reduction in Secchi transparency while water depth,...

Author(s): Musharaf Rehman, A. R. Yousuf, M. H. Balkhi, M. I. Rather, N. Shahi, M. Meraj and K. Hassan

Temporal relationship between climate variability, Prosopis juliflora invasion and livestock numbers in the drylands of Magadi, Kenya

April 2016

A study was conducted to determine the association of climate variability, Prosopis juliflora spread, and other vegetation trends with livestock population dynamics in Kajiado County, Kenya. Monthly rainfall, mean monthly temperatures, cattle, sheep and goats populations from January 2000 to December 2014, were analyzed to determine time series trends. Normalized Difference Vegetation Index (NDVI) data derived from...

Author(s): Kyuma R. K., Wahome R. G., Kinama J. M. and V. O. Wasonga

Environmental conditions in displaced communities of Khartoum State, Sudan

April 2016

Inadequate environmental sanitation has been recognized as a public health hazard worldwide. Nearly one quarter of all deaths and of the total disease burden and slightly more than one-third for children can be attributed to the changes and degradation of the environment. This study examined the environmental conditions of the displaced communities in Khartoum State, Sudan. A community-based descriptive, cross-sectional...

Author(s): Ibrahim Awad Eljack

Development of built environment and its implication on flood risk in Gombe Metropolis, Nigeria

April 2016

The increasing frequency of flood events in urban areas and its devastating impact on lives, properties, resources and the environment as a whole has posed a serious concern to environmental scientist the world over. There are many different perspectives regarding factors responsible for flood risk in urban areas, which range from hydrological extremes to man-induced factors. This paper examines the impact of built...

Author(s): Saidu Idris and Lal Merving Dharmasiri

Spatial dynamic of mobile dunes, soil crusting and Yobe’s bank retreat in the Niger’s Lake Chad basin part: Cases of Issari and Bagara

April 2016

The process of desertification is accelerated in the northern part of Lake Chad basin since the early 1970. Those processes linked to the recurrent drought and a heavy human pressure induced a great environmental damages. So this study based on diachronic cartography (1957, 1975 and 2007) aimed to describe and quantify the degradation dynamics in the contrasting Niger’s Lake Chad basin part. Thus significant...

Author(s): Moussa Issaka Abdoulkader, Somé Yélézouomin Stéphane Corentin, Abdourhamane Touré Amadou, Hassane Bouba, Malam Abdou Moussa, Mamadou Ibrahim, Abba Bachir, Garba Zibo and Yacouba Hamma

Using geographic information system (GIS) to determine waste transfer stations in relation to location of landfill sites in Accra Metropolis

March 2016

The existing landfill sites in Accra are reaching full capacity and the acquisition of land for the construction of landfill sites has become very difficult due to rapid developmental activities in Accra. However, with the current rate of development which will cause the construction of landfill sites to be far from the source of generation, there is urgent need to get an intermediate facility, that is, waste transfer...

Author(s): Lyndon Nii Adjiri Sackey

Assessment of sharps waste management practices in a referral hospital

March 2016

Sharps waste is part of infectious waste generated in health facilities, management of which is critical. This study aimed at assessing the sharps waste management practices in a referral hospital. The study was conducted at Muhimbili National Hospital (MNH) in Dar es Salaam, Tanzania. Data on sharps waste containers (SWCs) management in generation rates was collected for 60 days, while waste incineration data was...

Author(s): Veilla E. Matee and Samwel V. Manyele

Effect of biochar on soil properties and lead (Pb) availability in a military camp in South West Ethiopia

March 2016

Application of biochar to soil can improve numerous physicochemical and biological properties of the soil. The method for lead metal (Pb) remediation in soil is a challenge worldwide. The excessive Pb accumulation in the soil can radically reduce the soil quality and fertility. This study was conducted to find out the efficiency of biochar in improving the physicochemical properties of soil and to evaluate its effect on...

Author(s): Bayu Dume, Tadesse Mosissa and Amsalu Nebiyu

Physico-chemical and microbiological profile of bacterial and fungal isolates of Ikpoba River in Benin City: Public health implications

March 2016

This study examined the physico-chemical and microbiological profile of bacterial and fungal isolates of Ikpoba River between February 2013 and March 2013. The mean bacterial count for upstream water sample obtained in February was 2 × 102 ±1 cfu/ml while 1.09 × 104 ±3.6 was the count for treated industrial effluent sample collected in March. The mean fungal counts for the downstream water...


Effects of vegetation's degradation on carbon stock, morphological, physical and chemical characteristics of soils within the mangrove forest of the Rio del Rey Estuary: Case study – Bamusso (South-West Cameroon)

March 2016

This study was conducted to assess the capacity of mangroves soils to stock carbon and how degradation can influence its various properties. Transect method was performed. So, two transects of 100 m length and 10 m wide were established according to the degradation level. Total of 18 Soil samples were taken to be described and analysed. The degraded transect (T1) shows a mean carbon stock value of 2102.06 ± 405...

Author(s): NDEMA NSOMBO Eugene, AKO&#;O BENGONO Frédéric, ETAME Jacques, NDONGO DIN, AJONINA Gordon, and Paul BILONG

Evaluation of bacterial profile and biodegradation potential of abattoir wastewater

February 2016

Abattoir wastewater treatments were monitored using physicochemical parameters, bacterial profile and biodegradation potential for 28 days at 7 days intervals. The stages of abattoir wastewater treatment were evaluated through determination of physicochemical parameters such as pH, conductivity, total dissolved solid, dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, phosphate, nitrate and iron using...

Author(s): Emmanuel Temiotan Ogbomida, Bawo Kubeyinje and Lawrence Ikechukwu Ezemonye

Evaluation of the impact of mine activity on surrounding soils of Draa Lasfar mine in Marrakech- Morocco

January 2016

Heavy metal pollution is one of the most important problems in Morocco and causes serious effects to humans and animals. The aim of the present study was to evaluate the spatial distribution of heavy metals in Draa Lasfar mine area in Marrakech city and understand the characteristics of the pollution generated by this mine activity. A total of 120 soil samples were collected from Ouled Bou Aicha and Tazakourte along...

Author(s): Barkouch, Yassir, and Pineau, Alain

Seasonal impact on phyto-accumulation potentials of selected edible vegetables grown in Ishiagu quarry mining effluent discharge soils

January 2016

Seasonal impact on soil trace metals and phytoaccumulation potentials of Cucurbita pepo, Cucumis sativus and Taliferia occidentalis grown in Ishiagu quarry mining effluent discharge soils were investigated. Soil samples were collected 200 m (sample C), 100 m (sample B) away from discharge point (sample A) in wet and dry seasons. Trace metals were analysed using atomic absorption spectrophotometer. Results reveal a...

Author(s): Osuocha K. U., Akubugwo E. I., Chinyere G. C. and Ugbogu A. E.

Projections of precipitation, air temperature and potential evapotranspiration in Rwanda under changing climate conditions

January 2016

Precipitation and air temperature records from 6 sites in Rwanda in the period from 1964 to 2010 are used for past/present climate assessment. Future climate projections (2010-2099) based on 3 general circulation models and 2 emission scenarios (A2 and B1) are used for climate projections. Precipitation, air temperature, and potential evapotranspiration based on ccma_cgcm3_1.1; miroc3_2medres and mpi_echam5.1 models are...

Author(s): Mohammed Haggag, Jean Claude Kalisa and Ahmad Wagdy Abdeldayem  

Pollution assessment and heavy metal determination by AAS in waste water collected from Kushtia industrial zone in Bangladesh

January 2016

This study was to investigate the contamination level of waste water in the Kushtia industrial region of Bangladesh. Some parameters of waste water were analyzed like pH, electrical conductance, total dissolved solids (TDS), hardness, biochemical oxygen demand (BOD5), chemical oxygen demand (COD), and for heavy metal (Pb, Cd, Cr, Cu, Mn) concentration. The pH was found to be of range from 8.485 to 4.187; whereas, the...

Author(s): Rafiquel Islam, Jannat Al Foisal, Hasanuzzaman, Musrat Rahman, Laisa Ahmed Lisa and Dipak Kumar Paul

Assessment of some heavy metals in the surrounding soils of an automobile battery factory in Ibadan, Nigeria

January 2016

The levels of heavy metals (Pd, Zn, Cr, Cd, Fe and Cu in mg/kg) in soils were assessed with respect to distance in different directions around an abandoned battery company in Ibadan, Western Nigeria by using flame atomic absorption spectrophotometry method. The results generally show a decrease of lead (Pb) concentrations with increase in distance away from the company in all the four different directions (Northwest,...

Author(s): Peter Olaoye Oyeleke, Olushola Ayoola Abiodun, Rasaki Alao Salako, Olusanmi Ebenezer Odeyemi and Tolulope Bayode Abejide

Spatial, seasonal and inter-seasonal variations of thunderstorm frequency over Nigeria

December 2015

Using a 10-year daily data thunderstorm and dry thunder (thunder without precipitation) that spans from 1991-2000, the spatial, seasonal and inter-seasonal variations of thunderstorm frequency have been investigated with results which include the production of seasonal and inter-seasonal maps of dry thunder (thunder without precipitation) and thunderstorm frequencies. Results showed that there exists a latitudinal belt...

Author(s): Ochei, M. C., Orisakwe, I. C. and Oluleye, A.

Analysis of dendrometric characteristics of Acacia senegal (L.) Willd. (Fabaceae) in the semi-arid Sahelian area: A case study of silvopastoral zone in Senegal

December 2015

The study gives an analysis of the dendrometric parameters of a middle Sahelian species (Acacia senegal) in semi-arid environment to get better knowledge of its behavior. The research lays the principle that the species behaves differently according to the ecogeographical stations. So, its characteristics change from one environment to another. That is why it is important to do a specific study for every big zone. The...

Author(s): Sakhoudia Thiam, Bienvenu Sambou and Aliou Guissé

Landscape architects perception of their role in the mining industry in England

December 2015

Landscape architects have a broad based academic training that prepares them to undertake a variety of different challenges in planning, design, construction and management of land. The purpose of this study was to establish their perception regarding their role in the mineral extraction industry in England. The study involved an online survey of landscape architects practicing in different organisations in...

Author(s): Legwaila I. A.

Scrap metals’ role in circular economy in Ghana, using Sunyani as a case study

November 2015

Scrap metals can create jobs. It can also be reused and recycled as resource recovery measure in a circular economic model for Ghana. This case study therefore is a preliminary assessment of the quantity and economic value of scrap metals as essential part of resource recovery in the circular economic model. The findings of the study shows that scrap metal industry is growing in the Sunyani Municipality and similar...

Author(s): Andrews Nkansah, Francis Attiogbe and Engelbert Kumi

A comparative study of faecal sludge management in Malawi and Zambia: Status, challenges and opportunities in pit latrine emptying

November 2015

This review paper covers the issues of pit latrine emptying national policies and regulations with a focus on Malawi and Zambia. With 2.4 billion people worldwide still lacking improved sanitation facilities, developing countries need to look at policy, regulation and practice for household sanitation service provision with a new lens. What happens “next,” when improved sanitation facilities eventually...

Author(s): Rochelle Holm, James Madalitso Tembo and Bernard Thole

Non-carbon benefits for effective implementation of REDD+: The case of Bale Mountains Eco-Region, Southeastern Ethiopia

October 2015

The study was conducted in four districts, namely Nansebo, Harenna Buluk, Dolo Mena and Dodolla, Southeastern Ethiopia with the following objectives - to: (i) investigate species richness and similarity, diversity, evenness and stand structure of the woody species; (ii) determine the amount of carbon stock stored in the above-ground biomass of woody species; (iii) establish the relationship between the Shannon diversity...

Author(s): Sisay Nune Hailemariam, Teshome Soromessa and Demel Teketay

Assessment of cobalt levels in wastewater, soil and vegetable samples grown along Kubanni stream channels in Zaria, Kaduna State, Nigeria

October 2015

The concentration of cobalt was determined in wastewater, soil and vegetable (carrot, lettuce, onion, spinach, cabbage, tomato and okra) samples collected on seasonal basis from January, 2013 to September 2014 along Kubanni stream channels in Zaria. The results show cobalt levels in wastewater were in the range of 3.77 - 15.20 mg/L for the year 2013 and 4.74 - 15.20 mg/L in 2014; 0.63 - 3.57 mg/Kg for the year 2013 and...

Author(s): Oladeji S. O. and Saeed M. D.

Microbial safety assessment of recreation water at Lake Nabugabo, Uganda

October 2015

This study assessed the microbial safety of Lake Nabugabo beaches for recreation. Faecal microbial indicators and physico-chemical characteristics of beach recreational water were determined. Water sampling was done between 10.00 and 11.30 h and 1700 and 18.00 h. Data was analysed using student t-tests, ANOVA and spearman correlation (at 95%). Results were: total coliform (10.5-15.8 CFU/100 ml), faecal coliform (10-12.5...

Author(s): Nakirya Doreen, James Okot-Okumu and Fredrick Jones Muyodi

Investigation of groundwater flow potential in Makurdi, North Central Nigeria, using surficial electrical resistivity method

September 2015

Vertical electrical sounding (VES) employing Schlumberger electrode configuration was carried out in order to study the groundwater flow potential in Makurdi, north central Nigeria. This was done in thirty locations to determine the aquifer resistivity, thickness, longitudinal conductance, hydraulic conductivity and transmissivity. From the result, the averages and ranges of these parameters were determined. 2D contour...

Author(s): Daniel N. Obiora, Adeolu E. Ajala and Johnson C. Ibuot

Climate change adaptation strategies by small-scale farmers in Yatta District, Kenya

September 2015

Climate change is a great environmental challenge facing humanity today. In Yatta District, residents report frequent crop failures, water shortages and relief food has become a frequent feature of their life. This study examines the adaptation strategies to climate change adopted by the dry-land farming communities in Yatta District. Study participants included 510 randomly sampled small-scale farmers. Key informants...

Author(s): Benson Kamau Mburu, James Biu Kung’u and John Njagi Muriuki

Estimation of methane generation based on anaerobic digestion and mass balance at Kiteezi Landfill, Kampala, Uganda

September 2015

Kiteezi landfill site is the main solid waste dumping site in Kampala City (Uganda). In this study, the generation of methane from waste at Kiteezi landfill was measured using laboratory-scale anaerobic digestion experiment and estimated using the Mass balance model. The samples were collected in the wet and dry seasons, with five replicates for each season which were processed for further experiments focused on...

Author(s): Drake Mboowa, Noble Banadda, Nicholas Kiggundu, Isa Kabenge and Allan John Komakech

Groundwater quality degradation due to salt water intrusion in Zanzibar Municipality

September 2015

Saltwater intrusion problems are widespread where there are over pumping of groundwater from coastal aquifers. Water samples were collected from production boreholes in Zanzibar municipality and analyzed for salinity indication parameters comprising of chloride, electrical conductivity, total dissolved salts and percentage salinity levels. Historical water quality data of boreholes were also collected and used to...

Author(s): Rubhera R. A. M. Mato

Pesticide exposures in a malarious and predominantly farming area in Central Ghana

August 2015

In areas where malaria is endemic, pesticides are widely deployed for vector control, which has contributed to reductions in malaria deaths. Pesticide use for agrarian purposes reduces pest populations, thus improving crop production and post-harvest losses. However, adverse health effects have been associated with pesticide exposure, ranging from skin irritation to neurotoxicity and carcinogenicity. Though misuse of...

Author(s): Kenneth Ayuurebobi Ae-Ngibise, Patrick L. Kinney, Kwaku Poku Asante, Darby Jack, Ellen Abrafi Boamah, Robin Whyatt, Mohammed Mujtaba, Alexander Manu, Seth Owusu-Agyei and Blair J. Wylie

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