| 混凝和强化混凝对印染废水中锑(Ⅴ)的去除特性 |
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| 引用本文： | 王文龙,胡洪营,刘玉红,杜鑫,黄天寅,王纯,吴乾元.混凝和强化混凝对印染废水中锑(Ⅴ)的去除特性[J].环境科学学报,2019,39(10):3374-3380. |
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| 作者姓名： | 王文龙 胡洪营 刘玉红 杜鑫 黄天寅 王纯 吴乾元 |
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| 作者单位： | 清华大学环境学院,环境模拟与污染控制国家重点联合实验室,北京100084;清华大学深圳研究生院,国家环境保护环境微生物利用与安全控制重点实验室,深圳518055;清华大学环境学院,环境模拟与污染控制国家重点联合实验室,北京100084;清华-伯克利深圳学院,深圳环境科学与新能源技术工程实验室,深圳518055;苏州科技大学环境科学与工程学院,苏州,215009;清华大学深圳研究生院,国家环境保护环境微生物利用与安全控制重点实验室,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（No.2017ZX07205001） |
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| 摘 要： | 印染废水中锑的排放标准日趋严格,是印染废水处理面临的新挑战.以混凝和强化混凝去除印染废水中锑(Ⅴ)为目标,发现聚硫酸铁(PFS)混凝剂对印染废水中锑(Ⅴ)的去除效率显著优于铁铝复配混凝剂和铝盐混凝剂,去除效率达97.4%,出水锑(Ⅴ)浓度可达4μg·L~(-1).酸性条件(低水解度)有利于PFS生成Fe(a)活性组分和静电吸引、锑(Ⅴ)迁移,且絮体颗粒较小,促进PFS混凝除锑(Ⅴ)效率;酸性条件下PFS除锑(Ⅴ)效率是中性条件的1.27倍,处理出水中锑(Ⅴ)浓度仅为中性条件的33.3%.PFS投加量与除锑(Ⅴ)效率符合反比例模型.在较高锑(Ⅴ)浓度下,提升PFS投加量可提高除锑(Ⅴ)效率,但在较低锑(Ⅴ)浓度下,提升PFS投加量对除锑(Ⅴ)效率的促进较小.PFS絮体回流与混凝沉淀串联或耦合可显著提升印染废水中锑(Ⅴ)的去除效率,其除锑(Ⅴ)效率分别是单一PFS混凝沉淀的1.14倍和1.32倍,可有效降低出水锑(Ⅴ)浓度并节约PFS投加量和减少污泥生成量.其中混凝-絮体回流耦合工艺中,最佳絮体回流比例为100%.
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| 关 键 词： | 印染废水 锑 混凝 聚硫酸铁 絮体回流 |
| 收稿时间： | 2019/6/25 0:00:00 |
| 修稿时间： | 2019/8/14 0:00:00 |
Comparative study on the removal of antinomy(V) from dyeing and finishing wastewater by conventional and enhanced coagulation |
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| WANG Wenlong,HU Hongying,LIU Yuhong,DU Xin,HUANG Tianyin,WANG Chun and WU Qianyuan.Comparative study on the removal of antinomy(V) from dyeing and finishing wastewater by conventional and enhanced coagulation[J].Acta Scientiae Circumstantiae,2019,39(10):3374-3380. |
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| Authors: | WANG Wenlong HU Hongying LIU Yuhong DU Xin HUANG Tianyin WANG Chun and WU Qianyuan |
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| Institution: | 1. Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing 100084;2. Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055,1. Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing 100084;2. Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055,1. Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing 100084;2. Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055,1. Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing 100084;2. Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055,School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009,Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055 and Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055 |
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| Abstract: | The disposal limitation of antimony is becoming more and more strict, and so the removal of antimony is a new challenge in the dyeing and finishing wastewater treatment. Conventional and enhanced coagulation were employed for the dyeing wastewater treatment to remove antimony (V). It is found that poly ferric sulfate (PFS) can remove antimony (V) with an efficiency of 97.4%, outperforming the aluminum coagulants. PFS achieved 1.27-fold higher efficiency under acidic condition than under basic condition, because PFS formed more active species of Fe(a) and was protonated at lower pH. The removal efficiency of antimony(V) was reversely related to the PFS dosage at various initial antimony (V) concentrations. alThough higher removal efficiency was achieved with higher PFS dosage, but it doesn''t work under low antimony (V) concentration. Thus, the floc backflow and coagulation were employed in tandem or in coupling mode, achieving 1.14 times and 1.32 times higher efficiencies than the sole coagulation, respectively. A floc backflow ratio of 100% was optimal In the synergy mode of coagulation-backflow. |
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| Keywords: | dyeing and finishing wastewater antinomy coagulation poly ferric sulfate floc backflow |
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