January 2021

Current situation of solid waste management in East African countries and the proposal for sustainable management

Effects of unsustainable solid waste management are found all around the world but it is worse in developing and under developed countries like East African Community (EAC) countries. A big proportion of their solid waste is not properly managed. This paper highlighted the situation of solid wastes management in EAC countries and compared with other countries. More than 62.5% of generated solid waste in EAC is organic,...

Author(s): Gilbert Ntagisanimana, Ziqiang Yu and Hongzhi Ma

January 2021

Knowledge and attitude of Khat growing farmers on the safe use and handling of pesticides in Haromaya Wereda, Oromia Regional State, Eastern Ethiopia

The awareness level of the farmers growing Khat regarding the safe use of pesticide was investigated in this study at Haromaya Wereda, Eastern Ethiopia. In order to achieve the proposed objectives, structured questionnaires, oral discussions, and field observations were organized with the farmers growing Khat on the safe use of pesticide. After the study sites were selected purposively, systematic random sampling of the...

Author(s): Girma Regassa and Challa Regassa

January 2021

Short-term response of flat tree oyster, Isognomon alatus to CO2 acidified seawater in laboratory and field experiments

Seawater changing chemistry has consequences on coastal ecosystems and their living resources. Future projections suggest the pH could drop ~0.2-0.3 pH units by the year 2100 under a business-as-usual (BAU) CO2 emission scenario. Marine calcifying organisms such as corals, calcifying algae, crustaceans, mussels, oysters and clams are most likely to be impacted by ocean acidification. The Isognomon alatus (flat tree...

Author(s): Lailah Gifty Akita, Andreas Andersson, Houssem Smeti and Tiago Queiroz  

January 2021

Impact of oil installations on groundwater resources in Bongor Basin, Republic of Chad

This study examines concentration of pollutants that can contaminate soil, surface water and groundwater in the Bongor Basin. The analysis of thirty soil samples from six oil sites: Koudalwa, Ronier, Ndoubadana, Narenang, Croisement Baobab and Croisement Ridina was carried out using standard laboratory testing methods of chemical elements and pollutants. Results reveal that Nickel has a maximum concentration above the...

Author(s): SAMBA Koukouare Prosper, EWODO Mboudou Guillaume, DORIM Ngarbaroum, HAROUN Ali Adannou, HOULOULOU Nathan Koukouare and DANWE Raïdandi