Department of Geological Sciences;
Achievers University;
Owo.Ondo State;
Nigeria;
Department of Environmental Health Sciences;
College of Medicine;
University of Ibadan;
Ibadan;
Oyo State;
Nigeria;
Key Laboratory for Water Quality and Conservation of the Pearl River Delta;
Ministry of Education;
Guangzhou University;
Guangzhou 510006;
China;
School of Environmental Science and Engineering.Guangzhou University;
Guangzhou 510006;
China;
State Key Laboratory of Environmental Geochemistry;
Institute of Geochemistry;
Chinese Academy of Sciences;
Guiyang 550081;
China;
Anka; Bioaccumulation; Children; Heavy-metals; Hairs; Nails;