| 挥发及半挥发性有机物污染场地异位修复技术的二次污染及其防治 |
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| 引用本文： | 邓瑜衡,赵军.挥发及半挥发性有机物污染场地异位修复技术的二次污染及其防治[J].环境工程,2017,35(4):179-182. |
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| 作者姓名： | 邓瑜衡 赵军 |
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| 作者单位： | 1. 祁阳县环境保护监测站,湖南 永州,426100;2. 同济大学 长江水环境教育部重点实验室,上海,200092 |
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| 摘 要： | 欧洲和美国的污染场地修复实践表明:60%~90%的被污染场地存在有机物污染问题,其中挥发与半挥发性有机物(VOC/SVOC)是常见的土壤污染物。针对VOC/SVOC污染场地,采用异位修复技术符合现阶段的中国国情,但污染场地修复工程实践中可能存在二次污染问题。主要介绍了土壤气提、土壤机械通风、热脱附、土壤淋洗、生物堆和水泥窑协同处置6种污染土壤异位修复技术的原理,重点讨论了异位修复技术过程中共通的土壤挖掘、清运、堆放等中间环节产生的以及不同技术自身可能存在的二次污染问题,并给出了相应的防治措施,以期能够为中国和其他发展中国家的VOC/SVOC污染场地修复提供参考和建议。
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| 关 键 词： | 沉积物 重金属 迁移 转化 生物有效性 |
INFLUENCE OF SEDIMENT PROPERTIES ON MIGRATION AND BIOAVAILABILITY OF HEAVY METALS |
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| DENG Yu-heng,ZHAO Jun.INFLUENCE OF SEDIMENT PROPERTIES ON MIGRATION AND BIOAVAILABILITY OF HEAVY METALS[J].Environmental Engineering,2017,35(4):179-182. |
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| Authors: | DENG Yu-heng ZHAO Jun |
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| Abstract: | As the main sink and source of heavy metals,sediment played a significant role in the migration and transformation of heavy metals.This review comprehensively analyzed the mechanism of sediment physical-chemical and biological properties on transformation of heavy metals,exactly including how acid volatile sulfide (AVS),organic matter,texture (clay,silt and sand),hydrological condition,organism behaviors affect the bioavailability of metals in sediment.Additionally,various assessment methods of bioavailability of heavy metals were also discussed.Further,some novel materials such as polysulfides and nano-materials could be employed as promising adsorbents for the remediation of polluted sediment. |
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| Keywords: | sediment heavy metals migration transformation bioavailability |
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