有机污染物的反扩散、拖尾和反弹等问题严重影响传统原位化学氧化(In-Situ Chemical Oxidation,ISCO)技术对污染地下水的修复效果。药剂缓释技术可以实现对污染地下水的长时间持续修复,是保证原位化学氧化修复效果的有效方式。经过大量...有机污染物的反扩散、拖尾和反弹等问题严重影响传统原位化学氧化(In-Situ Chemical Oxidation,ISCO)技术对污染地下水的修复效果。药剂缓释技术可以实现对污染地下水的长时间持续修复,是保证原位化学氧化修复效果的有效方式。经过大量文献调研,介绍药剂缓释体-原位化学氧化(Controlled Release Materials-In-Situ Chemical Oxidation,CRM-ISCO)技术原理及缓释体材料组成,系统分析国内外CRM-ISCO技术修复地下水的研究现状及工程应用进展,总结技术应用存在的问题并对前景进行展望,以期为CRM-ISCO技术在我国有机污染地下水修复中的推广和应用提供参考。展开更多
Restoration of contaminated soil and groundwater could be divided into two phases. The first phase takes aim at reducing human being＇s health risks by active remediation, while the second phase aims at eliminating ec...Restoration of contaminated soil and groundwater could be divided into two phases. The first phase takes aim at reducing human being＇s health risks by active remediation, while the second phase aims at eliminating ecological risks by natural attenuation （NA）. Because of cost-effective and sustainable cleanup, monitored natural attenuation （MNA） and enhanced natural attenuation （ENA） have been gaining more attention recently, especially in the respects of ecological risk-oriented contaminated land management and a follow-up measure after active remediation. The uses and procedures of MNA for contaminated site cleanup and remediation in USA and EU were introduced firstly, and then possible applications of MNA in China were suggested. More developments and practices of MNA and ENA for managing contaminated sites in China are expected.展开更多
比较了活性炭吸附工艺、混凝工艺、Fenton氧化工艺以及O_3+H_2O_2氧化在以烷烃类和苯系类为主的农药复合污染场地地下水COD去除率的差异,选择了去除效率较高的Fenton氧化+活性炭联合修复工艺。结果表明,在1 L污染地下水中,将pH调节至4～...比较了活性炭吸附工艺、混凝工艺、Fenton氧化工艺以及O_3+H_2O_2氧化在以烷烃类和苯系类为主的农药复合污染场地地下水COD去除率的差异,选择了去除效率较高的Fenton氧化+活性炭联合修复工艺。结果表明,在1 L污染地下水中,将pH调节至4～4.5,投加25 mL 30%H_2O_2+3.53 g FeSO_4的Fenton试剂,反应3 h,过滤后再投加10 g/L活性炭吸附1 h,污染地下水的COD去除率达到85.3%,各污染组分均在标准限值以内。SEM电镜表明,实验前后活性炭微观结构发生了较大变化,活性炭对农药类污染组分有一定的吸附作用。展开更多
文摘有机污染物的反扩散、拖尾和反弹等问题严重影响传统原位化学氧化(In-Situ Chemical Oxidation,ISCO)技术对污染地下水的修复效果。药剂缓释技术可以实现对污染地下水的长时间持续修复,是保证原位化学氧化修复效果的有效方式。经过大量文献调研,介绍药剂缓释体-原位化学氧化(Controlled Release Materials-In-Situ Chemical Oxidation,CRM-ISCO)技术原理及缓释体材料组成,系统分析国内外CRM-ISCO技术修复地下水的研究现状及工程应用进展,总结技术应用存在的问题并对前景进行展望,以期为CRM-ISCO技术在我国有机污染地下水修复中的推广和应用提供参考。
文摘Restoration of contaminated soil and groundwater could be divided into two phases. The first phase takes aim at reducing human being＇s health risks by active remediation, while the second phase aims at eliminating ecological risks by natural attenuation （NA）. Because of cost-effective and sustainable cleanup, monitored natural attenuation （MNA） and enhanced natural attenuation （ENA） have been gaining more attention recently, especially in the respects of ecological risk-oriented contaminated land management and a follow-up measure after active remediation. The uses and procedures of MNA for contaminated site cleanup and remediation in USA and EU were introduced firstly, and then possible applications of MNA in China were suggested. More developments and practices of MNA and ENA for managing contaminated sites in China are expected.
文摘比较了活性炭吸附工艺、混凝工艺、Fenton氧化工艺以及O_3+H_2O_2氧化在以烷烃类和苯系类为主的农药复合污染场地地下水COD去除率的差异,选择了去除效率较高的Fenton氧化+活性炭联合修复工艺。结果表明,在1 L污染地下水中,将pH调节至4～4.5,投加25 mL 30%H_2O_2+3.53 g FeSO_4的Fenton试剂,反应3 h,过滤后再投加10 g/L活性炭吸附1 h,污染地下水的COD去除率达到85.3%,各污染组分均在标准限值以内。SEM电镜表明,实验前后活性炭微观结构发生了较大变化,活性炭对农药类污染组分有一定的吸附作用。
