化学絮凝与氧化耦合实现底泥中复合污染应急修复研究  

Coupling of Chemical Flocculation and Oxidation to Achieve Emergency Remediation of Combined Pollution in Sediment

作　　者：陈良波 曾庆军[2,4] 张一凡 刘俊杰 欧阳晓芳 冯春华 Chen Liangbo;Zeng Qingjun;Zhang Yifan;Liu Junjie;Ouyang Xiaofang;Feng Chunhua(Seventh Engineering Company of CCCC Fourth Harbor Engineering Co.,Ltd.,Guangdong,510230;CCCC Fourth Harbor Engineering Institute Co.,Ltd.,Guangdong,510230;School of Environment and Energy,South China University of Technology,Guangdong,511400;Key Laboratory of Environmental Protection&Safety of Communication Foundation Engineering,CCCC,Guangdong,510230)

机构地区：[1]中交四航局第七工程有限公司,广东510230 [2]中交四航工程研究院有限公司,广东510230 [3]华南理工大学环境与能源学院,广东511400 [4]中交交通基础工程环保与安全重点实验室,广东510230

出　　处：《当代化工研究》2022年第17期38-42,共5页Modern Chemical Research

摘　　要：随着外源污染物的不断汇入,营养元素、有机物和重金属等多种污染物在河涌底泥中形成复合污染,是引起河涌暴发黑臭问题的主要因素。本文以深圳铁排河污染河涌为研究对象,通过投加铁基生物炭和次氯酸钙混合药剂,实现复合污染物同步修复。研究表明,枯水期现场修复可将上覆水中3.92mg/L NH_(4)^(+)-N及0.04mg/L的总P去除完全。实现了底泥中84.2%NH_(4)^(+)-N的去除,重金属Pb和Cd的浸出质量浓度为0.03mg/L和0.01mg/L,分别比初始降低了73.8%和85.5%;丰水期现场修复可将底泥中47.7%总有机碳、83.8%的89.0mg/L NH_(4)^(+)-N和88.7%的53.9mg/L S^(2–)降解转化,3周的监测证明修复效果保持稳定。通过修复前后微生物群落分析对比,证明铁基生物炭与次氯酸钙耦合对底泥菌群结构没有产生显著影响。The continuous input of exogenous contaminants leads to the ubiquity of multiple pollutants such as nutrients,organic matter,and heavy metals in sediment.The combined pollution is the key factor causing the black-odor problem.Taking the sediment and overlying water of TiePai River in Shenzhen as the research subject,we propose to use the combination of iron-based biochar and calcium hypochlorite for remediating various pollutants simultaneously.The results show that during the low-water season,the 1-hour operation allowed the disappearance of 3.92 mg/L NH_(4)^(+)-N,0.04 mg/L total phosphorus in the overlying water,and 84.2%of NH_(4)^(+)-N in the sediment.The leached concentration of sediment Pb and Cd were 0.03 mg/L and 0.01 mg/L,decreased by 73.8%and 85.5%,respectively.During the high-water season,the 1-hour operation permitted the removal of 47.7%of total organic carbon,83.8%of 89.0 mg/L NH_(4)^(+)-N,and 88.7%of 53.9 mg/L S^(2–) in sediment.The consecutive monitoring of the water/sediment quality parameters over 3 weeks suggested the relatively long-term performance was maintained.The analysis of microbial community before and after treatment indicated that the coupling of iron-based biochar and calcium hypochlorite had insignificant impact on the bacterial composition.

关 键 词：黑臭河涌 底泥原位修复 复合污染 现场修复 应急处理 

分 类 号：X52[环境科学与工程—环境工程]