| 铬污染土壤处理中的铬含量及形态变化 |
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| 引用本文： | 陈勇,王清森,张浩凡.铬污染土壤处理中的铬含量及形态变化[J].化工环保,2017,37(3):335-339. |
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| 作者姓名： | 陈勇 王清森 张浩凡 |
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| 作者单位： | 1.四川大学 四川省环境保护土壤环境保护工程技术中心,四川 成都 610065；;2.四川大学 川大-日立环境应用技术研究中心,四川 成都 610065 |
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| 摘 要： | 采用FeSO_4和Na_2S作为还原剂处理铬污染紫色土壤,研究了还原过程中铬的含量及形态的变化。实验结果表明:当FeSO_4加入量为1.5%(w,下同)时,浸出Cr(Ⅵ)含量由(1 745.13±27.93)mg/kg降至(17.65±2.28)mg/kg,浸出总铬含量由(1 768.83±57.24)mg/kg降至(69.79±8.61)mg/kg,铬形态由水溶+碳酸盐结合态转变到较稳定的铁锰结合态;当Na_2S加入量为0.4%时,浸出Cr(Ⅵ)含量由(1 745.13±27.93)mg/kg降至(25.50±0.12)mg/kg,浸出总铬含量由(1 768.83±57.24)mg/kg降至(410.87±12.83)mg/kg,铬形态由水溶+碳酸盐结合态转变到铁锰结合态和有机结合态。
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| 关 键 词： | 紫色土壤 铬污染 铬形态 水溶+碳酸盐结合态 铁锰结合态 有机结合态 |
| 收稿时间： | 2016-12-28 |
Content and speciation changes of chromium in treatment of contaminated soil |
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| Chen Yong,Wang Qingsen,Zhang Haofan.Content and speciation changes of chromium in treatment of contaminated soil[J].Environmental Protection of Chemical Industry,2017,37(3):335-339. |
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| Authors: | Chen Yong Wang Qingsen Zhang Haofan |
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| Institution: | 1.Sichuan Environmental Protection and Soil Environmental Protection Engineering and Technology Center,Sichuan University,Chengdu Sichuan 610065,China；;2.Sichuan University-Hitachi Environment Application Technology Research Center,Chengdu Sichuan 610065,China |
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| Abstract: | FeSO4 and Na2S were used as reducing agent to treat the chromium-contaminated purple soil. The content and speciation changes of chromium in the reduction process were studied. The experimental results showed that：When the amount of FeSO4 was 1.5%（w），the content of leached Cr（Ⅵ）was decreased from（1 745.13±27.93）mg/kg to（17.65±2.28）mg/kg，the content of leached total chromium was decreased from（1 768.83±57.24）mg/kg to（69.79±8.61）mg/kg，and chromium is changed from water soluble carbonate bound state to the stable Fe-Mn bound state；When the amount of Na2S was 1.5%（w），the content of leached Cr（Ⅵ）was decreased from （1 745.13±27.93）mg/kg to （25.50±0.12）mg/kg，the content of leached total chromium was decreased from （1 768.83±57.24）mg/kg to （410.87±12.83）mg/kg，and chromium is changed from water soluble carbonate bound state to Fe-Mn bound state and organic bound state.? |
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| Keywords: | purple soil chromium pollution chromium speciation water soluble carbonate bound state Fe-Mn bound state organic bound state |
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