Adsorption of Hg(Ⅱ) from aqueous solution using thiourea functionalized chelating fiber  

作　　者：Xiaoxia Yao Huicai Wang Zhenhua Ma Mingqiang Liu Xiuqing Zhao Dai Jia 

机构地区：[1]School of Environmental and Chemical Engineering,Tianjin Polytechnic University [2]State Key Laboratory of Separation Membranes and Membrane Processes,Tianjin Polytechnic University

出　　处：《Chinese Journal of Chemical Engineering》2016年第10期1344-1352,共9页中国化学工程学报（英文版）

基　　金：Supported by the Tianjin and MOST Innovation Fund for Small Technology-based Firms(14ZXCXGX00724,13C26211200305);Science and Technology Support Program(13ZCZDSF00100)

摘　　要：A fast and selective adsorbent for Hg（ll） from aqueous solutions using thiourea （TU） functionalized polypropylene fiber grafted acrylic acid （PP-g-AA）, PP-g-AA-TU fibers, was characterized by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The adsorption behavior of the functionalized chelating fibers for Hg（Ⅱ） was investigated by static adsorption experiments, and the effects of some essential factors on adsorption of Hg（Ⅱ） were examined, such as pH, initial concentration, adsorption time, coexisting cations, and temperature, The results showed that the adsorptive equilibrium could be achieved in 10 min, and the equilibrium adsorption quantity of PP-g-AA-TU fibers was 20 times that of PP-g-AA fibers. The PP-g-AA-TU fibers showed a very high adsorption rate and a good selectivity for Hg（Ⅱ） over a wide range of pH. The adsorption isotherm can be well described with Langmuir model, with the maximum adsorption capacity for Hg（Ⅱ） up to 52.04 mg.g-1 and the removal of Hg（Ⅱ） more than 97%. The kinetic data indicate that the adsorption process is best-fitted into the pseudo-second-order model.A fast and selective adsorbent for Hg(II) from aqueous solutions using thiourea(TU) functionalized polypropylene fiber grafted acrylic acid(PP-g-AA),PP-g-AA-TU fibers,was characterized by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy.The adsorption behavior of the functionalized chelating fibers for Hg(II) was investigated by static adsorption experiments,and the effects of some essential factors on adsorption of Hg(II) were examined,such as pH,initial concentration,adsorption time,coexisting cations,and temperature.The results showed that the adsorptive equilibrium could be achieved in 10 min,and the equilibrium adsorption quantity of PP-g-AA-TU fibers was 20 times that of PP-g-AA fibers.The PP-g-AA-TU fibers showed a very high adsorption rate and a good selectivity for Hg(II) over a wide range of p H.The adsorption isotherm can be well described with Langmuir model,with the maximum adsorption capacity for Hg(II) up to52.04 mg·g^(-1)and the removal of Hg(II) more than 97%.The kinetic data indicate that the adsorption process is best-fitted into the pseudo-second-order model.

关 键 词：Thiourea Chelating fiber Adsorption Mercury ions Aqueous solution 

分 类 号：TQ342.792[化学工程—化纤工业] O647.33[理学—物理化学]