influence of mining activities in the north of potosi, bolivia on the water quality of the chayanta river, and its consequences. | mining activity in the north of potosi (siglo xx mine, ingenio catavi-siglo xx, pucro mine and colquechaca mine) produces minewater containing high concentrations of heavy metals such as as (0.02-34 mg/l), cd (45-11,600 microg/l), cu (0.35-32 mg/l), fe (42-1,010 mg/l), pb(33-3,130 microg/l), ni(20-4,320 microg/l), and zn (1.1-485 mg/l), that exceed considerably the limit values. the rivers in the north of potosi (katiri and pongoma) that do not receive minewater contain clear water with rather l ... | 2007 | 17171242 |