电动力修复技术处理尾砂中重金属的研究

电动力修复技术处理尾砂中重金属的研究(8200字)
摘  要：本文采用间歇通电方式对尾砂中的重金属进行电动力修复，随着通电时间增长，反应器阴极端pH呈碱性，中间段和阳极端pH值呈酸性，不同形态的各种重金属在电动力修复后的去除率不同，最高的为酸溶解态，Zn、Pb、Cd最高分别达到93.18%、82.64%、99.46%，各种金属去除率最低的均为残存态。去除率还与尾砂中重金属在电场中所处的位置有关，离阳极越近，去除率越小。实验结果表明电动力修复技术处理尾砂中的重金属是一个高效的，值得推广的技术。
关键词：电动力修复；重金属；尾砂；

Study on Electroremendiation of Heavy Metals in Mine Tail
Abstract: Electroremendiation of heavy metals in tailing by intermittent electric current was studied. The solution of cathode area was alkaline after the electroremendiation, while the solution of middle and anode area was acidic. The removal rates were different among deferent heavy metal speciation, the removal rate of acid-extraction fraction was the highest, 93.18%, 82.64% and 99.46% of Zn, Pb and Cd, while the removal rate of residual state was the lowest. The removal rate was affected by the position of heavy metal in the electric field, the closer to anode, the lower removal rate it will be. Electroremendiation of heavy metals in tailing was proved to be an efficient technology which was valuable to promotion. 
Key words: Electrormendiation; Heavy Metals; Mine Tail
 

目    录
摘  要    1
关键词    1
1  前言    2
2  实验材料和方法    3
2.1  实验原料及制备    3
2.2  实验仪器    3
2.3  电动力修复实验    3
2.4  样品测定方法    4
2.4.1  土壤的含水率（%）的测定    4
2.4.2  土壤pH值（H2O）的测定    5
2.4.3  土样的消解    5
2.4.4  土样中重金属总量的测定    5
2.4.5  重金属形态的测定    6
3  实验结果与讨论    7
3.1  尾砂样品的性质    7
3.3  PH值的空间变化    9
3.4  重金属去除率的分析    9
4  结论    11
致  谢    13