Heavy metal removal from aqueous solution using carbonaceous K_2S-impregnated adsorbent

查看全文 作　　者：Takaaki [1]Wajima;Kenji [1]Murakami;Takahiro [1]Kato;Katsuyasu [1]Sugawara

机构地区：[1]Faculty of Engineering and Resource Science,Akita University

出　　处：《Journal of Environmental Sciences》索引2009年第21卷第12期,共5页

摘　　要：A novel carbonaceous adsorbent for heavy metal removal was prepared from raw coal by one-step simple sulfur impregnation using K2S. Raw coal was mixed with K2S powder and then heated at 800°C for 30 min in nitrogen to produce K2S char. The sulfur content and form in K2S char were determined, and the ability of K2S char to adsorb Zn2+, Cd2+ and Pb2+ was examined. The K2S impregnation was effective at impregnating sulfur into coal, especially in the form of elemental, thiophenic and sulfatic sulfur. The sulfur content of K2S char was higher than those of raw coal and pyrolysis char. The Zn2+ removal in 2.4 mmol/L of Zn2+ solution by K2S char was higher than raw coal with the removal rate of 100%. K2S char adsorbed Pb2+ and Cd2+ in 24 mmol/L of Pb2+ and Cd2+ solution with the removal rate of 97% and 35%, respectively. The elution extents of adsorbed Pb2+ and Cd2+ were zero in distilled water and 27% in 0.1 mol/L HCl solution. These results indicated that an effective adsorbent for heavy metal ions was prepared from coal using K2S sulfur impregnation, and that the adsorbed metals were strongly retained in K2S char. 关键词：碳质吸附剂重金属离子水溶液硫含量吸附能力盐酸溶液去除率字符

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Heavy metal removal from aqueous solution using carbonaceous K_2S-impregnated adsorbent

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