高级氧化修复挥发性有机污染土壤的反应条件优化  

Optimization of Reaction Conditions for Advanced Oxidation Remediation of Volatile Organic Contaminated Soil

作　　者：徐子茜 诸毅 张汝壮 Xu Ziqian;Zhu Yi;Zhang Ruzhuang(Shanghai Environmental Ecological Remediation Technology Co.,Ltd.,Shanghai 200030;Shanghai Chentou 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 [2]上海城投上境生态修复科技有限公司,上海200030

出　　处：《广东化工》2022年第12期154-156,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。本研究针对上海普陀区某污染地块的高浓度挥发性有机污染土壤,对难降解的氯代芳香化合物及硝基苯类有机物采用高级氧化技术进行降解修复,对不同的反应条件进行了优化讨论,包括零价铁的投加、过硫酸钠投加量、过硫酸钠投加次数。研究结果表明,零价铁能在酸性环境中对污染物还原;过硫酸钠投加量影响反应达到平衡的时间,随着投加量不断提高,反应快能越早达到平衡;在过硫酸钠的投加量不变的情况下,应尽可能减少投加次数,少量多次投加导致反应不稳定,波动大。这些条件的探索可以保证反应稳定性好、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 Pu Tuo district in Shanghai,this study had made investigation on different reaction conditions of advanced oxidation on chlorinated aromatic and nitrobenzene compounds.Besides,optimization had been made for improvement.Results showed that it was effect to make a combination of reduction by zero-valent iron in acidic environment.The dosage of sodium persulfate affects the time to chemical equilibrium.With the increasing dosage,it would be faster to reach the equilibrium.With the same dosage of oxidation,it would be better to reduce the times of dosing since the more times of dosing would increase the instability.This method was a promising approach for it had steadily and effectively removed pollutants with affordable cost.

关 键 词：挥发性有机污染 氯代芳香化合物 硝基苯类有机物 高级氧化 优化 

分 类 号：TQ[化学工程]