尾矿库废水酸化与重金属污染规律研究

通过分析某黄铁铅锌矿尾矿库14年的废水监测数据，研究了高酸、高碱环境对尾矿硫化物重金属溶出的影响，绘制了尾矿库废水pH值与重金属离子浓度的关系曲线，建立了pH值与重金属污染的数学模型，揭示了废水酸化与重金属污染的内在机制，提出了密闭覆盖尾矿库以隔绝硫化物与H2O、O2反应产生及在尾矿浆中添加碱性物质以中和H^ ]、切断重金属离子溶出反应链等根治尾矿库废水酸化与重金属污染的控制技术。

Study on law of acidification of wastewater in tailings reservoir and heavy metals pollution

The continuous data in a period of 14 years for monitoring wastewater in tailings reservoir of an iron-lead-zinc pyrite mine are analyzed to investigate the infection of high acid and high alkali situation to heavy metals dissolving from sulphide in tailings. Through drafting the relationship curve between pH value and concentration of heavy metals ion in the wastewater, with building related arithmetic models, the internal mechanism of wastewater acidification and heavy metals ion pollution is revealed. Consequently, the control techniques are put forward, including obturating and overlaying surface of tailings reservoir to isolate sulphide from water or oxygen to produce H ], appending alkali matter to neutralize H ] in order to cut off the reaction chain of heavy metals ion dissolving, with the result that the acidification and heavy metals pollution of wastewater in tailings reservoir are brought under radical control.