| 微波-过氧化氢工艺处理含Cu-EDTA废水 |
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| 引用本文： | 王宏杰,曹喆,赵子龙,董文艺. 微波-过氧化氢工艺处理含Cu-EDTA废水[J]. 化工学报, 2017, 68(12): 4756-4763. DOI: 10.11949/j.issn.0438-1157.20170776 |
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| 作者姓名： | 王宏杰 曹喆 赵子龙 董文艺 |
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| 作者单位： | 1.哈尔滨工业大学深圳研究生院, 广东 深圳 518055;2.深圳市水资源利用与环境污染控制重点实验室, 广东 深圳 518055 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项（2012ZX07206-002）；深圳市科技计划项目（JCYJ20160318093930497）。 |
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| 摘 要： | 采用微波-过氧化氢工艺处理含Cu-EDTA废水，考察反应时间、初始pH、H2O2投加量、微波功率以及共存物质等因素对该工艺处理效能的影响，并分析了氧化作用机制。结果表明，在初始pH为3，H2O2投加量为41 mmol·L-1，微波功率为210 W时，1.57 mmol·L-1Cu-EDTA反应10 min后，Cu和TOC去除率分别高达97.0%和60.7%，出水电导率低至1.8 mS·cm-1，产泥量仅为0.15 g·L-1。NO3-的存在对Cu-EDTA的氧化降解过程无明显影响，而Cl-、H2PO4-和酒石酸对反应过程有一定的抑制作用。该工艺下反应4 min后Cu-EDTA基本氧化为中间产物，并在4～6 min内急剧降解，最终形成小分子羧酸类物质、NH3-N和无机碳。反应过程沉淀产物主要以CuO形式存在。相比Fenton工艺，该工艺在氧化效能、出水电导率及产泥量等方面有显著优势。
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| 关 键 词： | 微波-过氧化氢 Cu-EDTA 氧化 废水 芬顿 污染 |
| 收稿时间： | 2017-06-15 |
| 修稿时间： | 2017-08-11 |
Treatment of Cu-EDTA containing wastewater by microwave-H2O2 process |
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| WANG Hongjie,CAO Zhe,ZHAO Zilong,DONG Wenyi. Treatment of Cu-EDTA containing wastewater by microwave-H2O2 process[J]. Journal of Chemical Industry and Engineering(China), 2017, 68(12): 4756-4763. DOI: 10.11949/j.issn.0438-1157.20170776 |
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| Authors: | WANG Hongjie CAO Zhe ZHAO Zilong DONG Wenyi |
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| Affiliation: | 1.School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, Guangdong, China;2.Shenzhen Key Laboratory of Water Resource Application and Environmental Pollution Control, Shenzhen 518055, Guangdong, China |
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| Abstract: | In the present study, microwave-H2O2 (MW-H2O2) process was applied for the treatment of Cu-EDTA containing wastewater. The effects of reaction time, initial pH, H2O2 dosage, microwave power and coexistent substances were investigated in detail. The corresponding degradation mechanism of Cu-EDTA was also described. The results showed that for the elimination of 1.57 mmol·L-1 Cu-EDTA, the highest removal efficiencies of Cu (97.0%) and TOC (60.7%) were achieved under the optimum conditions (i.e. initial pH 3, H2O2 dosage 41 mmol·L-1, microwave power 210 W, and reaction time 10 min). In this situation, the effluent conductivity decreased to 1.8 mS·cm-1, and only 0.15 g·L-1 of the sludge yield was generated. The presence of coexistent substances such as NO3- had nearly no effects on the degradation processes, while Cl-, H2PO4- and tartaric acid were unfavorable to the oxidation degradation of Cu-EDTA. After treated for 4 min, Cu-EDTA was almost totally oxidized to various Cu-intermediates, which rapidly degraded within 4-6 min, leading to the final formation of low molecular organic acids, NH3-N, and inorganic carbon. The solid sludge mainly presented in the forms of CuO. Compared with traditional Fenton process, MW-H2O2 process exhibited more excellent performance in terms of oxidation efficiency, effluent conductivity and sludge yield. |
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| Keywords: | microwave-hydrogen peroxide Cu-EDTA oxidation wastewater Fenton pollution |
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