As （Arsenic）, Ba （Barium）, Cr （Chromium）, Cu （Copper）, Fe （Iron）, Mne （Manganese）, Pb （Lead） and Zn （Zinc） concentrations were investigated in sediments collected from fifteen sampling locations in Nav...As （Arsenic）, Ba （Barium）, Cr （Chromium）, Cu （Copper）, Fe （Iron）, Mne （Manganese）, Pb （Lead） and Zn （Zinc） concentrations were investigated in sediments collected from fifteen sampling locations in Naviundu river basin, Luano and Ruashi rivers and Luwowoshi spring in Lubumbashi city from February to April 2016. Chemical analyses of the samples were carried out using a portable X-ray fluorescence spectrometer. Mean pH values ranged from 4.2 to 5.8. The sediment highest mean levels of As （40 mg·kg^-1·dw） and Cu （3,723 mg·kg^-1 ·dw） were noted in Chemaf （Chemicals of Africa） hydrometallurgical plant effluent, those of Pb （51.5mg·kg^-1·dw） and Zn （335mg·kg^-1·dw） were recorded in Kabecha river and those of Ba （657.5mg·kg^-1·dw）, Cr （75 mg·kg^-1·dw）, Mn （591 mg·kg^-1·dw） and Fe （88,450mg·kg^-1·dw） were respectively found in Naviundu river at Cimenkat （Katanga＇s Cement factory） exit, Naviundu river under bridge on De Plaines avenue, Mukulu river and Foire channel. Mean As, Cu and Zn levels of sediments exceeded the corresponding SQGs （Sediment Quality Guidelines）, PELs （Probable Effect Levels） in some of the studied rivers. They could have adverse effects on aquatic organisms in those rivers and on the health of people who depend on the rivers for water supply, irrigation and/or recreation.展开更多
文摘As （Arsenic）, Ba （Barium）, Cr （Chromium）, Cu （Copper）, Fe （Iron）, Mne （Manganese）, Pb （Lead） and Zn （Zinc） concentrations were investigated in sediments collected from fifteen sampling locations in Naviundu river basin, Luano and Ruashi rivers and Luwowoshi spring in Lubumbashi city from February to April 2016. Chemical analyses of the samples were carried out using a portable X-ray fluorescence spectrometer. Mean pH values ranged from 4.2 to 5.8. The sediment highest mean levels of As （40 mg·kg^-1·dw） and Cu （3,723 mg·kg^-1 ·dw） were noted in Chemaf （Chemicals of Africa） hydrometallurgical plant effluent, those of Pb （51.5mg·kg^-1·dw） and Zn （335mg·kg^-1·dw） were recorded in Kabecha river and those of Ba （657.5mg·kg^-1·dw）, Cr （75 mg·kg^-1·dw）, Mn （591 mg·kg^-1·dw） and Fe （88,450mg·kg^-1·dw） were respectively found in Naviundu river at Cimenkat （Katanga＇s Cement factory） exit, Naviundu river under bridge on De Plaines avenue, Mukulu river and Foire channel. Mean As, Cu and Zn levels of sediments exceeded the corresponding SQGs （Sediment Quality Guidelines）, PELs （Probable Effect Levels） in some of the studied rivers. They could have adverse effects on aquatic organisms in those rivers and on the health of people who depend on the rivers for water supply, irrigation and/or recreation.
