羧甲基壳聚糖复合絮凝剂对电镀废水中六价铬的絮凝效果

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英文篇名：Flocculation of hexavalent chromium in electroplating wastewater by using carboxymethyl chitosan composite flocculant 作者：尹爱萍 ; 陈彦娇 ; 李田伟 英文作者：YIN Ai-ping*Department of Chemistry, Xinzhou Teachers University, Xinzhou 034000, China, CHEN Yan-jiao, LI Tian-wei 关键词：羧甲基壳聚糖 ; 硅酸钠 ; 氯化铁 ; 复合胶体 ; 电镀废水 ; 六价铬 ; 絮凝 英文关键词：carboxymethyl chitosan; sodium silicate; ferric chloride; composite colloid; electroplating wastewater; hexavalent chromium; flocculation 中文刊名：DDTL 英文刊名：Electroplating & Finishing 机构：忻州师范学院化学系; 出版日期：2013-08-15 出版单位：电镀与涂饰 年：2013 期：v.32;No.206 基金：山西省高等学校科技研究开发项目(20111123);; 忻州师范学院科研基金资助项目(201128) 语种：中文; 页：DDTL201308018 页数：4 CN：08 ISSN：44-1237/TS 分类号：47-50

摘要

以FeCl3和Na2SiO3为原料制得聚硅酸氯化铁(PFSC),再与羧甲基壳聚糖(CMC)复合,获得低成本、高絮凝能力的新型无机–有机复合胶体,并将其用作絮凝剂,探讨了其投加量以及温度、pH、絮凝时间等工艺条件对电镀废水中六价铬去除率的影响。结果表明:室温下加入600mL/L复合胶体絮凝1h时,Cr(VI)去除率达到99.75%以上。与单一絮凝剂相比,该复合絮凝剂投加量少,絮凝时间短,pH范围广。
        Poly-silicic-ferric chloride (PFSC) was prepared from FeCl3 and Na2SiO3 , and then blended with carboxy-methyl chitosan (CMC) to synthesize a novel low-cost and high-performance inorganic–organic composite colloid as flocculant. The effects of the dosage of the composite colloid, temperature, pH, and treatment time on removal of Cr(VI) in electroplating wastewater were studied. The results showed that the removal rate of Cr(VI) reached >99.75% after flocculation with 600 mL/L composite colloid at room temperature for 1 h. The application of the composite flocculant has the advantages of less dosage, shorter flocculation time, and wider pH range as compared to using a single flocculant.

引文

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