期刊论文

中文

环境科学研究

1001-6929

2008

21

1

150-154

10.13198/j.res.2008.01.156.leim.030

国家自然科学基金资助项目(20677080)； 日本JICA资助项目(J-05-00729)；

本校为其他机构

在运用MINTEQA2模型对模拟重金属废水和EDTA萃取液中重金属离子形态进行分析的基础上，选用Na_2S沉淀法处理含EDTA的重金属废水．结果表明：没有含EDTA的重金属废水，Cd~(2＋)，Cu~(2＋)，Pb~(2＋)和Zn~(2＋)是重金属离子的主要形态；而在含EDTA的模拟重金属废水和重金属萃取液中，重金属络合物是重金属离子的主要形态．在C（EDTA）为0的条件下，Cd~(2＋)，Cu~(2＋)和Pb~(2＋)的去除率达到100％，而Zn~(2+)’的去除率仅为57．0％；随着c（EDTA）的增加，相同c（Na_2S）对废水中重金属的去除率逐渐下降．在一定c（EDTA）的条件下，废水中重金属的去除率随着c（Na_2S）的增加而增加；但是在相同c（...

On the base of analysis of species distributions of heavy metals in solutions with MINTEQA2 computer programme at working condition, Na2S addition was used to remove metals from wastewater containing EDTA solution. The results showed that metal ion Cd^2＋ , Cu^2＋ , Pb^2＋ , and Zn^2＋ were main species in the simulated wastewater without EDTA solution. However, metal-EDTA was found to be predominant fraction among metal species in the simulated wastewater with EDTA solution. Heavy metals Cd^2＋ , Cu^2＋ , Pb^2＋ were precipitated completely by...