| 臭氧预破络-重金属捕集耦合体系高效去除废水中络合态镍的机理研究 |
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| 引用本文： | 关智杰,郭艳平,区雪连,周思宇,孙水裕,任杰,陈楠纬,李保庆,周伟文.臭氧预破络-重金属捕集耦合体系高效去除废水中络合态镍的机理研究[J].环境科学学报,2019,39(6):1754-1762. |
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| 作者姓名： | 关智杰 郭艳平 区雪连 周思宇 孙水裕 任杰 陈楠纬 李保庆 周伟文 |
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| 作者单位： | 广东工业大学环境科学与工程学院,广州,510006;广东省固体废弃物资源化与重金属污染控制工程技术研究中心,广东环境保护工程职业学院,佛山528216;广东工业大学环境科学与工程学院,广州510006;广东省固体废弃物资源化与重金属污染控制工程技术研究中心,广东环境保护工程职业学院,佛山528216 |
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| 基金项目： | 广东省科技计划项目（No.2017A030223007）；广东高校省级重点平台和重大科研项目（No.2017GKZDXM007，2017GKCXTD004）；广东省自然科学基金（No.2015A030308008） |
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| 摘 要： | 电镀废水处理厂化学镀镍废水经常规物化处理后,仍存在低浓度、高稳态的重金属污染物,导致后续出现难处理、难生化、难达标排放的普遍技术问题.本文提出一种新型高效的臭氧预氧化破络-重金属捕集螯合深度处理技术体系,即臭氧-重金属捕集剂(O_3-SN-9)耦合体系.通过单因素静态实验,重点考察了臭氧(O_3)氧化初始pH值、氧化时间、臭氧载气流量、重金属捕集剂(SN-9)投加量等对出水总镍(Ni)去除率的影响,并探讨了臭氧氧化破络络合态Ni的途径及SN-9捕集重金属Ni的机理.结果表明,在化学镀镍废水初始总Ni浓度为2.76 mg·L~(-1),臭氧预氧化初始pH值范围为7.0～11.0,反应时间为40 min,载气流量为3 L·min~(-1),SN-9投加量为40 mg·L~(-1)的条件下,处理后出水总Ni浓度稳定低于0.1 mg·L~(-1),可达到《电镀水污染物排放标准》(DB44/1597—2015)水污染物特别排放限值中总Ni的排放限值要求.液相色谱-质谱(LC-MS)、叔丁醇(Tert-Butyl Alcohol,TBA)捕获羟基自由基(·OH)实验和傅里叶变换红外光谱(FTIR)分析表明,在臭氧预氧化破络与螯合捕集Ni前后协同耦合的高效体系中,前端臭氧氧化以间接氧化为主,直接氧化为辅;氧化进程可控制为部分氧化破络,将高稳态镍络合物氧化成易失稳的小分子Ni络合物及部分离子态Ni;后续SN-9高效螯合捕集Ni的主要官能团为巯基官能团(—SH),可从低分子易失稳的Ni络合物上竞争夺取Ni离子,或直接与游离态Ni(II)反应,形成稳定的四边形配位螯合沉淀物,从而达到去除Ni的目的.
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| 关 键 词： | 化学镀镍废水 部分破络 螯合捕集 深度处理 络合态Ni |
| 收稿时间： | 2018/11/2 0:00:00 |
| 修稿时间： | 2018/12/14 0:00:00 |
Mechanism of high efficiency removal of complex nickel in wastewater by ozone pre-decomposition-coupling heavy metal capture system |
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| GUAN Zhijie,GUO Yanping,OU Xuelian,ZHOU Siyu,SUN Shuiyu,REN Jie,CHEN Nanwei,LI Baoqing and ZHOU Weiwen.Mechanism of high efficiency removal of complex nickel in wastewater by ozone pre-decomposition-coupling heavy metal capture system[J].Acta Scientiae Circumstantiae,2019,39(6):1754-1762. |
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| Authors: | GUAN Zhijie GUO Yanping OU Xuelian ZHOU Siyu SUN Shuiyu REN Jie CHEN Nanwei LI Baoqing and ZHOU Weiwen |
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| Institution: | School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006,Guangdong Province Solid Waste Recycling and Heavy Metal Pollution Control Engineering Technology Research Center, Guangdong Polytechnic of Environmental Protection Engineering, Foshan 528216,Guangdong Province Solid Waste Recycling and Heavy Metal Pollution Control Engineering Technology Research Center, Guangdong Polytechnic of Environmental Protection Engineering, Foshan 528216,School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006,1. School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006;2. Guangdong Province Solid Waste Recycling and Heavy Metal Pollution Control Engineering Technology Research Center, Guangdong Polytechnic of Environmental Protection Engineering, Foshan 528216,Guangdong Province Solid Waste Recycling and Heavy Metal Pollution Control Engineering Technology Research Center, Guangdong Polytechnic of Environmental Protection Engineering, Foshan 528216,Guangdong Province Solid Waste Recycling and Heavy Metal Pollution Control Engineering Technology Research Center, Guangdong Polytechnic of Environmental Protection Engineering, Foshan 528216,Guangdong Province Solid Waste Recycling and Heavy Metal Pollution Control Engineering Technology Research Center, Guangdong Polytechnic of Environmental Protection Engineering, Foshan 528216 and Guangdong Province Solid Waste Recycling and Heavy Metal Pollution Control Engineering Technology Research Center, Guangdong Polytechnic of Environmental Protection Engineering, Foshan 528216 |
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| Abstract: | |
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| Keywords: | electroless nickel plating wastewater partial decomposition chelation capture depth treatment complex Ni |
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