生物学杂志

生物学杂志

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巢湖地区汪家凹尾矿库生态环境影响因素研究

  

  1. 合肥学院生物与环境工程系;安徽省环境污染防治与生态修复协同创新中心,合肥市环境应急管理中心
  • 出版日期:2016-04-18 发布日期:2016-04-18
  • 通讯作者: 吴 克，教授，硕士生导师，主要从事微生物学、环境工程和酶工程学的教学及科研工作。

Influential factors of tailings ecological environment in Wangjiaao, Chaohu

  1. 1.Department of Biological and Environmental Engineering; Collaborative Innovation Center for Environmental Pollution Prevention and Ecological Restoration of Anhui Province; 2.Hefei Environmental Emergency Management Center, Hefei
  • Online:2016-04-18 Published:2016-04-18

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摘要：  

以巢湖流域汪家凹尾矿库为例，通过实验分析尾矿基本性质，模拟静态、动态淋溶实验，研究不同降雨量、温度、降雨酸度等条件对硫铁尾矿的生态环境影响。结果表明，重金属Cu、Cr、Cd、Mn、Zn、As、Pb含量分别为9.40、9.59、0.04、78.28、9.19、22.56、63.68 mg/kg，这些重金属主要以残渣态和可氧化态存在，也含有酸提取态和可还原态，重金属对生态环境的影响能力为 Zn＞As＞Cu ＞Cd＞Mn＞Cr＞Pb。尾矿NAG 和 NAPP 值分别为H2SO4 203.84 kg/t和86.79kg/t，表明尾矿具有很高的产酸潜力。淋溶实验结果显示，在雨量集中、酸雨以及高温条件下，尾矿库中重金属的浸出量大，酸性废水产生量大，对周边生态环境造成不利影响。

关键词: 汪家凹, 尾矿, 生态环境, 影响因素

Abstract: The basic properties of Wangjiaao Sulfur-Iron tailings near Chaohu, Hefei China, were analyzed through laboratory simulation of static/dynamic leaching experiment, simulated rainfall, temperature and rainfall acidity conditions. The influential factors of Sulfur-Iron tailingst ecological environment (heavy metals and acid waste water) were assayed. The results showed that concentrations of Cu, Cr, Cd, Mn, Zn, As and Pb were 9.40, 9.59, 0.04, 78.28,9.19, 22.56, 63.68 mg/kg, respectively. Tailing was mainly present in residual and oxidable fraction, followed by acid exchangeable and reducible. The impact on the ecological environment followed the order of Zn＞As＞Cu ＞Cd＞Mn＞Cr＞Pb. The NAG and NAPP values were H2SO4 203.84 kg·t-1 and 86.79 kg·t-1, the results indicated that the tailings had high acid forming potential. Leaching experiments results indicated that under the condition of rainfall concentration, acid rain and high temperature were advantageous to the dissolution of heavy metals and acid waste water. The contaminants in the tailings had great influence on surrounding ecological environment.

Key words: Wangjiaao, tailings, ecological environment, influential factors