Vertical physicochemical parameter distributions and health risk assessment for trace metals in water columns in eastern Lake Tanganyika, Tanzania

作     者：SHEN Qiushi ZHANG Lu Ismael Aaron KIMIREI WANG Zhaode GAO Qun CHEN Shuang YU Cheng 

作者机构：State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Sino-Africa Joint Research Center Chinese Academy of Sciences Tanzania Fisheries Research Institute-Kigoma Centre School of Environmental Science and Technology Suzhou University of Science and Technology 

出 版 物：《Journal of Oceanology and Limnology》 (海洋湖沼学报（英文）)

年 卷 期：2019年第37卷第1期

页      面：134-145页

核心收录：

学科分类：07[理学] 

基　　金：Supported by the Construction Plan for Overseas Scientific Education Base of the Chinese Academy of Sciences(No.SAJC201609) the National Natural Science Foundation of China(No.51409241) the National Key Research and Development Program of China(No.2016YFE0123300) 

主　　题：trace metal heavy metal risk assessment water column Lake Tanganyika 

摘      要：The vertical distributions of trace metals and physicochemical parameters in water columns in Kigoma Bay and Kungwe Bay in eastern Lake Tanganyika, Tanzania, were studied. The Al, Ba, Ca, Co,K, Mg, Mn, Mo, Na, Sn, Sr, and V concentrations were low and varied very little with depth. The toxic heavy metal(As, Cr, Cu, Ni, Pb, and Zn) concentrations were relatively high in the surface water, and the Cu, Ni, Pb, and Zn concentrations decreased with depth. Principal component and cluster analyses indicated that the metals in the lake had three main sources. Al, Ba, Ca, Co, Cu, Cr, Mn, Sr, Sn, and V were found to be geogenic; As, Cr, Cu, Mo, Ni, Pb, Sn and Zn anthropogenic; and As, Ca, Co, Mg, and Na *** health risk assessments were performed, and it was found that trace metals in the water at most of the sampling sites would cause no potential adverse ef fects or non-carcinogenic health risks through dermal contact or ingestion. However, trace metals in surface water in Kungwe Bay could have certain adverse ef fects on human health through the ingestion pathway(the total hazard quotient for ingestion(ΣHQi ng)was 1.75(a value 1 was de?ned as possibly indicating adverse ef fects). The Pb HQi ng for surface water in Kungwe Bay was 1.50 and contributed 80% of the ΣHQ_(ing_, implying that Pb pollution is a water quality and safety problem that needs to be carefully monitored and the potential sources identi?ed.