Competitive adsorption of Pb(Ⅱ), Cu(Ⅱ) and Zn(Ⅱ) onto xanthate-modified magnetic chitosan

Yehua Zhu; Jun Hu; Jianlong Wang

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Competitive adsorption of Pb(Ⅱ), Cu(Ⅱ) and Zn(Ⅱ) onto xanthate-modified magnetic chitosan

机译：黄药酸酯修饰的磁性壳聚糖对Pb（Ⅱ），Cu（Ⅱ）和Zn（Ⅱ）的竞争吸附

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摘要

The competitive adsorption of Pb(Ⅱ), Cu(Ⅱ) and Zn(Ⅱ) onto a novel xanthate-modified magnetic chitosan (XMCS) was systematically investigated in single and ternary metal systems. In single system, equilibrium studies showed that the adsorption of Pb(II), Cu(ll) and Zn(ll) followed the Langmuir model and the maximum adsorption capacities were found to be 76.9,34.5 and 20.8 mg/g, respectively. In ternary system, the combined action of the metals was found to be antagonistic and the metal sorption followed the order of Pb(Ⅱ) > Cu(Ⅱ) > Zn(Ⅱ); the Langmuir isotherm fitted the data of Pb(Ⅱ) and Cu(Ⅱ) well while the isotherm data of Zn(Ⅱ) correlated well with the Freundlich model. The Fourier transform infrared spec-troscopy (FTIR) and X-ray photoelectron spectra (XPS) studies showed that the thiol and amino group participated in the adsorption of Pb(Ⅱ), Cu(Ⅱ) and Zn(Ⅱ).

机译：在单，三元金属体系中，系统地研究了Pb（Ⅱ），Cu（Ⅱ）和Zn（Ⅱ）在新型黄药改性的磁性壳聚糖（XMCS）上的竞争吸附。在单一系统中，平衡研究表明，Pb（II），Cu（II）和Zn（II）的吸附遵循Langmuir模型，最大吸附容量分别为76.9、34.5和20.8 mg / g。在三元体系中，金属的结合作用是拮抗的，金属的吸附顺序为Pb（Ⅱ）> Cu（Ⅱ）> Zn（Ⅱ）。 Langmuir等温线很好地拟合了Pb（Ⅱ）和Cu（Ⅱ）的数据，而Zn（Ⅱ）的等温线数据与Freundlich模型很好地相关。傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）研究表明，巯基和氨基参与了Pb（Ⅱ），Cu（Ⅱ）和Zn（Ⅱ）的吸附。

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来源
《Journal of Hazardous Materials》 |2012年第30期|p.155-161|共7页
作者
Yehua Zhu; Jun Hu; Jianlong Wang;
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作者单位

Laboratory of Environmental Technology, 1NET, Tsinghua University, Beijing 100084. PR China;

Laboratory of Environmental Technology, 1NET, Tsinghua University, Beijing 100084. PR China;

Laboratory of Environmental Technology, 1NET, Tsinghua University, Beijing 100084. PR China,Beijing Key Laboratory of Fine Ceramics, Tsinghua University, Beijing 100084, PR China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类
关键词
xanthate-modified magnetic chitosan; heavy metal; adsorption; magnetic chitosan; equilibrium; competitive adsorption;

机译：黄药改性的磁性壳聚糖;重金属;吸附磁性壳聚糖平衡;竞争性吸附;

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Competitive adsorption of Pb(Ⅱ), Cu(Ⅱ) and Zn(Ⅱ) onto xanthate-modified magnetic chitosan

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