Heavy Metals Pollution in Water, Sediments and Fish of Léré Lake, Western Mayo Kebbi (Chad)
Tchadanaye New Mahamat,
Soledé Kidjakebo,
Souvalbé Kandibé Abel,
Noumi Guy Bertrand
Issue:
Volume 5, Issue 1, January 2017
Pages:
1-11
Received:
21 December 2016
Accepted:
4 January 2017
Published:
17 February 2017
Abstract: The present study is a contribution to the physical and chemical analysis of water, sediments and fish in order to determine the pollution status of Léré lake in Western Mayo-Kebbi (Chad). The study investigates parameters such as temperature, pH, conductivity, turbidity, dissolved oxygen, BDO5 and CDO. Likewise, concentrations of trace elements known as heavy metals Cu, Cd, Pb, Fe, Mn, As, Zn, Ni and Cr of which some are especially toxic were determined in water, sediments and fish. Results of heavy metals analysis: Cu (0.95 - 3.90 mg/l), Pb (0.13 - 0.75 mg/l), Ni (0.40 - 6.40 mg/l), Cr (0.03 - 0.50 mg/l), As(0.03 - 0.18 mg/l), Cd (0.07 - 0.15 mg/l) and Zn (0.98 - 15.30 mg/l) as well as data on CDO (26-50 mg/l) and BDO5 (17-34 mg/l) showed that water pollution of the Léré lake was very significant though consumed by surrounding populations. The same report can be made on strongly contaminated sediments: Ni (5.9 mg/Kg), As (2.71 mg/Kg), Cr (6.60 mg/Kg), Cd (0.50 mg/Kg) and Mn (0.26 mg/Kg). Over all, within the framework of this study, fish flesh was less contaminated than fish gills.
Abstract: The present study is a contribution to the physical and chemical analysis of water, sediments and fish in order to determine the pollution status of Léré lake in Western Mayo-Kebbi (Chad). The study investigates parameters such as temperature, pH, conductivity, turbidity, dissolved oxygen, BDO5 and CDO. Likewise, concentrations of trace elements kn...
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Environmental Crisis of Rangpur City Corporation: A Case Study in Radhakrishnapur and South Binnatari Village
A. T. M. Zinnatul Bassar,
Md. Ahoshan Habib
Issue:
Volume 5, Issue 1, January 2017
Pages:
12-18
Received:
7 January 2017
Accepted:
18 January 2017
Published:
23 February 2017
Abstract: This research studies the environmental crisis in villages Radhakrishnapur and South Binnatari under Rangpur City Corporation. Although the villages are under City corporation area, these are deprived of the opportunities and access available for City Corporation. Moreover the areas are regularly being affected by natural disasters as flood and river bank erosion. People of the community gave a mixed perception on “Monga”, whether it is prevailing or not and they defined it by their own way. People of the community have silent conflict with the Army body on land acquisition issue. People have less access to work and a portion migrates to other areas, either inside the city or other cities to find out alternative sources of income. The researchers tried to explore the problems and crisis of the people of these two villages so that further initiatives to mitigate these can be taken.
Abstract: This research studies the environmental crisis in villages Radhakrishnapur and South Binnatari under Rangpur City Corporation. Although the villages are under City corporation area, these are deprived of the opportunities and access available for City Corporation. Moreover the areas are regularly being affected by natural disasters as flood and riv...
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