April 2015
A simple anaerobic system for onsite treatment of domestic wastewater
The use of anaerobic process for domestic wastewater treatment would achieve lower carbon footprint as it eliminates aeration and generate methane. Among several anaerobic treatment processes, high rate anaerobic digesters receive great attention due to its high loading capacity and chemical oxygen demand removal rate. Up-flow anaerobic sludge blanket reactor (UASB) is getting wide acceptance among several anaerobic...
April 2015
Effects of different NaCl Concentrations on germination and seedling growth of Amaranthus hybridus and Celosia argentea
Salinity refers to the salt content of any given system. By nature, arid soils are naturally saline. Soils could also acquire salinity due to some agricultural practices like irrigation. There is need therefore for search on halophytes that could adapt to such soils and be used to reclaim soils contaminated with salts. Thus, this present study focused on investigating Amaranthus hybridus and Celosia argentea with...
April 2015
Potential carbon credit and community expectations towards viability of REDD project in Ugalla- Masito ecosystem: A case of Ilagala and Karago villages, KigomaTanzania
The paper presents results of the potential carbon credit and community expectations towards viability of REDD+ projects in Ugalla- Masito ecosystem using a case of Ilagala and Karago villages whereby REDD+ is being piloted. Various data collection methods were employed and these included focused group discussion, interview, structured questionnaires and document analysis. Results of the study indicate that, there are...
April 2015
Diffusion coefficients of Grewia spp. biopolymers in water
Diffusion coefficients of biopolymers extracted from Grewia spp. barks in water were studied under various physicochemical conditions. Extractions were carried out on barks of 3 cm in length at different pH (5-9), temperature (25-50°C) and ionic strength (10-3-10-2M), using CaCl2 and NaCl as background electrolytes. Factorial experimental plan design was used and diffusion coefficients were determined using second...
April 2015
Urban water pollution by heavy metals and health implication in Onitsha, Nigeria
Studies of common heavy metals were conducted at Onitsha, Anambra State, the most urbanized city in Southeastern Nigeria. It was discovered that both surface and subsurface water were heavily polluted. Seven (7) heavy metals namely: arsenic (As+2), cadmium (Cd+2), lead (Pb+2), mercury (Hg+2), zinc (Zn+2), copper (Cu+2) and iron (Fe+2) were studied. Their major sources include wastes like refuse dumps, effluent from...
April 2015
The benefits of the use of biogas energy in rural areas in Ethiopia: A case study from the Amhara National Regional State, Fogera District
This study was conducted to assess socio-economic and environmental benefits of biogas energy and its challenges. The study used descriptive type of research design consisting of quantitative and qualitative research approach. The data collection instruments were household survey, key informants interview and self-observation to collect quantitative and qualitative data types. The study revealed that the biogas...
April 2015
Climate variation based on temperature and solar radiation data over a 29 year period in Lilongwe City, Malawi
Economies that mainly depend on agriculture are to a large extent being negatively impacted by climate change. In this study, temperature and solar radiation data from Chitedze Weather Station, Lilongwe City, Malawi for a 29-year period (1985 to 2013) were assessed for the possibility of climate variation. In addition, the concentration of carbon dioxide over Malawi within the same period as temperature and solar...
April 2015
Study of the physico-chemical conditions and evaluation of the changes in eutrophication-related problems in El- Mex Bay
El- Mex Bay is a relatively large coastal embayment west of Alexandria. The bay is an important fishery ground as well as recreation area. It includes both the Western Harbor and Dekhaila Harbor. It is one of heavily polluted areas on the Egyptian Mediterranean coast, receiving huge amount of agricultural, industrial, and sewage wastes from the adjacent Lake Mariut through El- Umoum Drain. According to different...
April 2015
The effects of heavy metals concentration on some commercial fish in Ogun River, Opeji, Ogun State, Nigeria
A study was conducted on commercially important fish species of heavy metals in water bodies. The primary objectives were to find out the amount of heavy metals concentration in the fish species, sediments and water samples at the deep and shallow part of the river, to determine the toxicity and relationship between the collected samples and the rate at which it pollutes the water. Atomic absorption spectrophotometer...
April 2015
Trace metals in intertidal sediment of mangrove-sheltered creeks in Niger Delta, Nigeria: Variability before and after crude oil spillage
Trace metals (Zn, Cu and Pb) fluxes were studied in five intertidal flats at Bodo Creek, Eastern Niger Delta, Nigeria in 2006, and re-evaluated in 2010 following two major oil spills that occurred in the creek. This study is the first to look at trace metal loads in the interstitial sediments of Bodo creek. Standard methods were employed in the sampling campaign and analysis. The concentration of all metals under study...
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