氯代芳香化合物及硝基苯类有机污染土的修复和应用性优化  

Remediation and Application Optimization of Chlorinated Aromatic and Nitrobenzene Compounds Polluted Soils

作　　者：徐子茜 李明 张汝壮 Xu Ziqian;Li Ming;Zhang Ruzhuang(Shanghai Environmental Ecological Remediation Technology Co.,Ltd.,Shanghai 200030,China)

机构地区：[1]上海环境绿色生态修复科技有限公司,上海200030

出　　处：《广东化工》2022年第11期146-148,共3页Guangdong Chemical Industry

摘　　要：有机污染土壤修复一直是实际工程中的难点,虽然相关研究较多,但研究中的反应条件比较理想难以应用到大规模的工程实践中。本研究针对上海桃浦地块的复合性有机污染土壤,对难降解的氯代芳香化合物及硝基苯类有机物进行不同的修复方法的比较,包括不同体系的高级氧化和热脱附反应,并结合实际对各类实施参数进行优化。研究结果表明,零价铁在酸性环境中对污染物还原,过硫酸钠在亚铁激活条件下对污染物高级氧化,当固液比为8∶1时能够对各类有机物进行有效降解,去除率可达到80%以上。固液比是最重要影响参数,固液比过高反应缓慢去、除率低,固液比过低所需反应空间大、造价高。该条件下,反应稳定性好、经济有效,修复后的土壤能满足修复目标,具有工程可行性。It is a key point for organic pollutants in soil remediation.Even though there are great many related investigations in this field,the reaction conditions are too ideal to apply to engineering.Concentrated on practical organic polluted soil in Tao Pu plot in Shanghai,this study had compared the performance of different sorts of remediation technologies,including different advanced oxidation and thermal desorption,on chlorinated aromatic and nitrobenzene compounds.Besides,optimization had been made in terms of parameters for improvement.Results showed that it was effect to make a combination of reduction by zero-valent iron in acidic environment firstly and oxidation by persulfate sodium activated with ferric with solid to liquid ratio of 8∶1.The total removal rate reached over than 80%in this optimal method.Solid to liquid ratio is the most important of all the parameters affecting the removal rate.The extreme high ratio would lower the reaction and removal rate while the extreme low ratio needs larger reaction space and more cost.This method was a promising approach for it had steadily and effectively removed pollutants with affordable cost.

关 键 词：有机污染土壤 氯代芳香化合物 硝基苯类有机物 高级氧化 固液比 

分 类 号：X53[环境科学与工程—环境工程]