不同修复材料对铅锌尾砂中DTPA浸提态Pb、Zn、Cu、Cd含量的影响

发布时间：2018-05-02 22:58

  本文选题：铅锌尾砂 + 土壤修复　； 参考：《环境工程》2016年09期

【摘要】：采矿业产生的大量尾砂作为典型的污染源,其含有的重金属等有害成分在雨水浸淋下会直接或间接对周边环境造成污染。为研究尾砂中重金属的污染修复技术,以湖南郴州某废弃矿区的尾砂为研究对象,通过添加质量分数为2.0%的生石灰、还原铁粉、过磷酸钙等廉价修复材料,对尾砂中DTPA浸提态Pb、Zn、Cu、Cd的含量变化进行研究,并就其含量变化所体现的时间效应及机理进行探讨。研究发现,还原铁粉对尾砂的修复作用最好,其次是过磷酸钙。还原铁粉使得尾砂中DTPA浸提态Pb、Zn、Cu、Cd的含量分别降低了59.91%,56.53%,75.81%,35.78%;过磷酸钙使得尾砂DTPA浸提态Pb、Zn、Cu、Cd的含量分别降低了48.85%,44.27%,44.27%,39.23%,可为尾砂中重金属稳定化工程实施提供参考。
[Abstract]:A large amount of tailings produced by mining industry as a typical source of pollution, its heavy metals and other harmful components in the leaching of Rain Water will directly or indirectly cause pollution to the surrounding environment. In order to study the remediation technology of heavy metals in tailings, the tailings of an abandoned mining area in Chenzhou, Hunan Province were studied. By adding 2.0% of quicklime, reducing iron powder, superphosphate and other cheap restoration materials, The content change of DTPA extracted PbPb-ZnOCU / CD in tailings was studied, and the time effect and mechanism of the change were discussed. It was found that reducing iron powder had the best effect on tailings, followed by calcium superphosphate. The reduced iron powder reduced the content of DTPA extracted DTPA in tailing sand by 59.91% and 56.53% and 75.81% respectively, and calcium superphosphate reduced the content of DTPA extracted state Pb ~ (2 +) Zn ~ (2 +) Cu ~ (2 +) in tailings by 48.85% (44.2744.27) ~ 39.23 ~ (23), respectively, which could provide reference for the implementation of heavy metal stabilization engineering in tailings.
【作者单位】： 深圳市铁汉生态与环境股份有限公司;
【基金】：广东省软科学研究计划项目铁汉生态研究院建设(2014B090903015) 深圳市科技计划项目(CXZZ20140418105252027) 深圳市战略性新兴产业发展专项资金(发改办高技[2012]1065号,GCZX20120618100801416)
【分类号】：X753;X53
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本文编号：1835847