改性泥炭对Pb(Ⅱ)和Cd(Ⅱ)的单一及竞争吸附研究

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英文篇名：Single and competitive adsorption of Pb(Ⅱ) and Cd(Ⅱ) onto modified peat 作者：陈月芳 ; 彭焕玲 ; 侯荣荣 ; 孙善伟 ; 许锦荣 ; 王飞 英文作者：CHEN Yue-fang;PENG Huan-ling;HOU Rong-rong;SUN Shan-wei;XU Jin-rong;WANG Fei;School of Energy and Environmental Engineering,University of Science and Technology Beijing;Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants,University of Science and Technology Beijing; 关键词：碱改性泥炭 ; 竞争吸附 ; Pb(Ⅱ) ; Cd(Ⅱ) 英文关键词：alkaline treated peat;;competitive adsorption;;Pb(Ⅱ);;Cd(Ⅱ) 中文刊名：SXHG 英文刊名：Applied Chemical Industry 机构：北京科技大学能源与环境工程学院;北京科技大学北京工业污染物资源处理重点实验室; 出版日期：2018-11-29 09:33 出版单位：应用化工 年：2019 期：v.48;No.324 基金：国家水体污染控制与治理科技重大课题(2014ZX07101-012) 语种：中文; 页：SXHG201902001 页数：5 CN：02 ISSN：61-1370/TQ 分类号：7-11

摘要

以强碱改性泥炭,研究改性泥炭对Pb~(2+)、Cd~(2+)的吸附效果及竞争吸附机制。结果表明,改性泥炭对Pb~(2+)、Cd~(2+)具有显著的吸附效果,吸附容量分别由118,64 mg/g提高到225,95 mg/g;FTIR分析表明,吸附过程为Pb~(2+)、Cd~(2+)与—OH、—COO-、C—H等官能团的络合作用或者离子交换作用。当吸附时间为70 min,pH在4～8,改性泥炭添加量分别为0.8,1.6 g/L时,可达到高效与经济双层效益。竞争吸附中,Pb~(2+)、Cd~(2+)的吸附容量均低于单一离子时的吸附容量,且竞争吸附能力Pb~(2+)>Cd~(2+)。
        The alkali-modified peat was used as adsorbent to study the adsorption effect and competitive adsorption mechanism of Pb~(2+) and Cd~(2+) in solution.The results showed that the modified peat had a significant effect on Pb~(2+) and Cd~(2+),and the adsorption capacity increased from 118 mg/g and 64 mg/g to225 mg/g and 95 mg/g,respectively.FTIR analysis showed that the adsorption process was complexation or ion exchange between Pb~(2+),Cd~(2+) and —OH,—COO-,C—H.When the adsorption time was 70 min,the pH was 4～8,and the modified peat content was 0.8 g/L and 1.6 g/L respectively,the double-layer efficiency can be achieved.In the competitive adsorption,the adsorption capacities of Pb~(2+) and Cd~(2+) were lower than those in the presence of a single ion,and the competitive adsorption capacity was Pb~(2+)>Cd~(2+).

引文

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