| 多硫化钙对铬污染土壤处理效果的长期稳定性研究 |
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| 引用本文： | 刘馥雯,罗启仕,卢鑫,王漫莉,陆强,林匡飞,崔长征.多硫化钙对铬污染土壤处理效果的长期稳定性研究[J].环境科学学报,2018,38(5):1999-2007. |
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| 作者姓名： | 刘馥雯 罗启仕 卢鑫 王漫莉 陆强 林匡飞 崔长征 |
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| 作者单位： | 华东理工大学资源与环境工程学院国家环境保护化工过程环境风险评价与控制重点实验室;永清环保股份有限公司上海分公司; |
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| 基金项目： | 国家环境保护公益性行业科研专项项目（No.201509035） |
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| 摘 要： | 稳定化修复技术逐渐成为我国现阶段重金属污染土壤修复的主要技术,其修复后验收主要通过分析土壤重金属的浸出浓度来评价修复效果,然而该验收指标未反映土壤重金属在不同情景下的长期稳定性.本研究以经稳定化药剂多硫化钙(CPS)处理前后的某电镀厂铬(Cr)污染土壤为对象,开展多pH浸出、模拟酸雨淋溶、冻融循环和干湿交替作用下土壤重金属Cr的长期稳定性研究.结果表明:在多pH浸出实验中,稳定化处理后达标土壤(CPS-D-3)在pH大于6.92时,Cr(Ⅵ)浸出浓度大于0.05 mg·L~(-1).在整个试验模拟酸雨淋溶作用的过程中(30年),稳定化处理可以有效抑制Cr向环境中释放,CPS-D-3中的总Cr和Cr(Ⅵ)的累积释放量比未经稳定化处理的Cr污染土壤(CPS-D-1)分别显著减少了91.86%和99.61%.在冻融循环的过程中,稳定化处理可有效降低土壤中浸出总Cr的含量.经过15次干湿交替后CPS-D-1和CPS-D-3分别比未经过干湿交替作用时浸出总Cr浓度减少了99.96%和96.88%.多pH浸出试验可以作为检验土壤安全的较为敏感的指标,冻融循环、模拟酸雨淋溶和干湿交替评估方法可协助评价重金属的长期稳定性.
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| 关 键 词： | Cr污染土壤 稳定化 多pH浸出 模拟酸雨淋溶 冻融循环 干湿交替 |
| 收稿时间： | 2017/11/6 0:00:00 |
| 修稿时间： | 2017/12/24 0:00:00 |
Study on long-term stability of the treatment of Cr-contaminated soil by using CPS |
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| LIU Fuwen,LUO Qishi,LU Xin,WANG Manli,LU Qiang,LIN Kuangfei and CUI Changzheng.Study on long-term stability of the treatment of Cr-contaminated soil by using CPS[J].Acta Scientiae Circumstantiae,2018,38(5):1999-2007. |
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| Authors: | LIU Fuwen LUO Qishi LU Xin WANG Manli LU Qiang LIN Kuangfei and CUI Changzheng |
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| Institution: | School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237,Branch of Shanghai, Yonker Environmental Protection Co., Ltd, Shanghai 200051,School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237,School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237,School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237,School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237 and School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237 |
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| Abstract: | |
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| Keywords: | chromium contaminated soil stabilization pH-depended leaching simulated acid rain leaching freeze-thaw cycles wet-dry cycles |
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