| 含铬电镀废水的资源化处理 |
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| 引用本文： | 李岩,李亚林,郑波,杜冬云.含铬电镀废水的资源化处理[J].环境科学与技术,2009,32(6). |
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| 作者姓名： | 李岩 李亚林 郑波 杜冬云 |
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| 作者单位： | 1. 中南民族大学环境工程与科学研究所,化学与材料科学学院/催化材料科学湖北省重点实验室,湖北,武汉,430074
2. 大弟兄有色金属有限公司动力厂,湖北,黄石,435005 |
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| 基金项目： | 武汉市攻关课题，中南民族大学重点课题 |
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| 摘 要： | 针对电镀厂产生的高浓度含铬废水,研究了硫化钠还原沉淀法回收电镀废水中的铬的可能性。讨论了pH、投药量、反应时间和搅拌速率等变量对铬回收效果的影响。结果表明:在pH1.6,工业硫化钠(60%)投加量为4.0g/L废水,搅拌速率170r/min和反应时间t=90min的条件下能够将原水中初始浓度为533.1mg/L的三价铬C(rⅢ)和530.0mg/L的六价铬C(rⅥ)]分别降到42.9mg/L和0.01mg/L。此时铬渣中三氧化二铬(Cr2O3)含量为29.5%,满足回用要求。接下来,为了进一步去除残余的三价铬C(rⅢ),利用正交试验设计讨论了重金属捕集剂(FZ)对其去除的最佳条件。在上述条件下出水中总铬(TCr)浓度最终降到0.94mg/L。
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| 关 键 词： | 电镀废水 重金属捕集剂 资源化 铬渣 |
Resource Recovery of Chromium from Electroplating Wastewater |
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| LI Yan,LI Ya-lin,ZHENG Bo,DU Dong-yun.Resource Recovery of Chromium from Electroplating Wastewater[J].Environmental Science and Technology,2009,32(6). |
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| Authors: | LI Yan LI Ya-lin ZHENG Bo DU Dong-yun |
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| Institution: | 1.Institute of Environment Engineering and Science;School of Chemistry and Material Science;Hubei key Laboratory for Catalysis and Material Science;Central South University for Nationalities;Wuhan 430074;China;2.Power Plant;Daye Nonferrous Metals Co.Ltd;Huangshi 435005;China |
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| Abstract: | Sodium sulfide -reduction precipitation process was studied for the recovery of chromium from wastewater produced in electroplating plants.The affecting factors such as pH,dosage,reaction time and stirring rate of chromium recovery were discussed.Results showed that under the optimal conditions as pH value 1.6,dosage of sodium sulfide(60%)for industrial use 4.0g/L of wastewater,reaction time 90min and stirring rate 170r/min,the initial concentrations of C(rⅢ)and C(rⅥ) can be decreased from 533.1mg/L and 530.0mg/L to 42.9mg/L and 0.01mg/L respectively.The content of Cr2O3 in chromium slag was 29.5%,satisfactory to the reuse requirement.For removing residual Cr(Ⅲ)further with heavy metal chelating agent(FZ),orthogonal design was discussed and the optimal removal conditions were obtained.The concentration of total chromium in effluent was 0.94mg/L at the end. |
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| Keywords: | electroplating wastewater heavy metals chelating agent resource recovery chromium slag |
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