硅酸钙负载零价纳米铁吸附去除水中六价铬  

Removal Cr^(6+) from Water Using Nanoscale Zero-valentiron Supported on Calcium Silicate

作　　者：秦泽敏 董黎明[1] 赖花 周恋彤 

机构地区：[1]北京工商大学环境科学与工程系,北京100048 [2]神华准格尔能源有限责任公司,呼和浩特0103001

出　　处：《硅酸盐通报》2015年第8期2376-2381,共6页Bulletin of the Chinese Ceramic Society

基　　金：北京市教育委员会科技计划面上项目(KM201310011005);北京市学科建设-重点学科-环境工程项目(PXM2014_014213_000037);北京市自然科学基金(8112012)

摘　　要：利用液相还原法制备硅酸钙负载零价纳米铁(CS-n ZVI)进行去除水中Cr(Ⅵ)的实验研究。结果表明,CSn ZVI对Cr(Ⅵ)的去除效果明显优于还原铁粉和硅酸钙,略差于零价纳米铁;低p H值、越低初始Cr(Ⅵ)浓度及较大投加量均有利于Cr(Ⅵ)去除,最大去除率可达98.9%;反应后CS-n ZVI颗粒扫描电镜及X射线能谱分析结果表明Cr占3.06wt%;等温吸附实验结果表明较好拟合Langmuir和Freundlich等温吸附模型,CS-n ZVI对Cr(Ⅵ)的最大吸附容量达253.8 mg/g。The removal of Cr6 ＋ from water was investigated by the nanoscale zero-valent iron supported on calcium silicate（CS-nZVI） prepared with theliquid phase reduction method. Results showed that much higher removal rate of Cr6＋ Was observed from CS-nZVI than those from iron powder and calcium silicate. Lower pH and initial Cr6＋ concentration, and much more dosage were favorable of removal of Cr6＋ in water, and the best removal rate was nearly 98.9%. The Cr element with 3.06wt% concentration was detected on the post-reaction CS-nZVI particle surface by SEM and EDS. Meanwhile, the Langmuir and Freundlich isothermal adsorption model was used for simulation, which showed that the maximum adsorption ability of CS-nZVI was 253.8 mg/g.

关 键 词：零价纳米铁 硅酸钙负载 六价铬 去除 

分 类 号：TQ028[化学工程]