Studying and determining simultaneously Zn2 , Cd2, Pb2 and Cu2 in mud and water of the Dai Tu fish reservoir, Hoang Mai district, Hanoi

Hoang Mai, a district in the south of Hanoi, has a lot of reservoirs, supplying fish to the whole city. Due to the development of the industry, many heavy metals from waste pollute this water source. In this research, the content of heavy metals in mud and water in Dai Tu fish reservoir, Hoang Mai, Hanoi, was determined to evaluate the pollution levels.