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首页> 外文期刊>Journal of Polymers and the Environment >Synthesis of Cross-linked Carboxyl Modified Polyvinyl Alcohol and its Application in Selective Adsorption Separation of Cu(Ⅱ)from Cd(Ⅱ) and Ni(Ⅱ)
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Synthesis of Cross-linked Carboxyl Modified Polyvinyl Alcohol and its Application in Selective Adsorption Separation of Cu(Ⅱ)from Cd(Ⅱ) and Ni(Ⅱ)

机译：交联羧基改性聚乙烯醇的合成及其在CD（Ⅱ）和Ni（Ⅱ）中Cu（Ⅱ）的选择性吸附分离的应用

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摘要

A cross-linked copolymer (XL-P(AA-co-VAc)) of vinyl acetate and acrylic acid was prepared using azobisisobutyronitrile as initiator andN,N'-methylenebisacrylamide as crosslinker. Then, XL-P(AA-co-VAc) was reacted with ethanol to prepare a crosslinked carboxyl modified polyvinyl alcohol (XL-P(AA-co-VA)). The as-prepared XL-P(AA-CO-VA) hydrogel was characterized by FTIR, XRD, SEM and BET, and investigated as an selective heavy metal ion adsorbent. The adsorption characteristics of the XL-P(AA-CO-VA) hydrogel were studied with a aqueous solution containing ternary metal ions Cu(II), Cd(II) and Ni(II). It was found that XL-P(AA-CO-VA) can selectively adsorb Cu(II) in competition with Cd(II) and Ni(II), and the selectivity coefficients of 48 (beta(Cu(II)/Cd(II))) and 80 (beta(Cu(II)/Ni(II))) were obtained. The kinetics were demonstrated to match well with the pseudo-second order kinetics model with the rate constants (K-2, g/(mg center dot min)) of 3.71 & x2715;10(- 4), 0.0011 and 0.0015 for Cu(II), Cd(II) and Ni(II), respectively. The equilibrium adsorption of Cu(II) to the XL-P(AA-CO-VA) hydrogel follows the Langmuir adsorption model withq(max)of 41.27 mg/g andK(L)of 0.94 L/mg. The thermodynamic studies indicate that Delta G(0)was negative and increased with temperature, and the adsorption process of XL-P(AA-CO-VA) for Cu(II) ion was spontaneous and exothermic. Delta Hand Delta Swere - 56.57 kJ/mol and - 171.18 J center dot(mol center dot K)(-1), respectively. The XL-P(AA-CO-VA) hydrogel is of interest for the selective separation of Cu(II) from industrial wastewater containing Cd(II) and Ni(II).
机译：使用偶氮二异丁腈作为引发剂ANDN，N'-亚甲基双丙烯酰胺作为交联剂制备乙酸乙酸乙烯酯和丙烯酸的交联共聚物（XL-P（AA-CO-VAC））。然后，将XL-P（AA-Co-VAC）与乙醇反应以制备交联的羧基改性聚乙烯醇（XL-P（AA-Co-Va））。通过FTIR，XRD，SEM和BET表征AS制备的XL-P（AA-CO-VA）水凝胶，并作为选择性重金属离子吸附剂研究。用含有三元金属离子Cu（II），CD（II）和Ni（II）的水溶液，研究了XL-P（AA-Co-Va）水凝胶的吸附特性。发现XL-P（AA-Co-VA）可以在竞争中选择性地吸附CD（II）和Ni（II），以及48（β（Cu）/ Cd的选择性系数（ II）））和80（β（β（II）/ Ni（II）））。证明动力学与伪二次阶动力学模型相匹配，其具有3.71＆X2715的速率常数（K-2，G /（Mg中心点）），为3.71＆x2715; 10（4），0.0011和0.0015用于Cu（ II），CD（II）和Ni（II）分别为单位。 Cu（II）与XL-P（AA-Co-Va）水凝胶的平衡吸附遵循41.27mg / g ANDK（L）的Langmuir吸附模型为0.94L / mg。热力学研究表明，ΔG（0）与温度为阴性并增加，Cu（II）离子的XL-P（AA-Co-Va）的吸附过程是自发性的和放热的。 Delta手ΔSwere - 56.57 kJ / mol和 - 171.18 j中心点（mol中心点k）（ - 1）。 XL-P（AA-Co-VA）水凝胶对于来自含CD（II）和Ni（II）的工业废水的选择性分离Cu（II）。

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  • 来源
    《Journal of Polymers and the Environment》 |2021年第1期|28-37|共10页
  • 作者

    Zeng Lelin; Zhou Feixiang; Hu Rong; Xie Wanyun; Wang Guoxiang; Yang Caixia; Liang Enxiang; Xu Wenyuan; Van der Bruggen Bart;

  • 作者单位

    Hunan Inst Sci & Technol Coll Chem & Chem Engn Yueyang 414006 Hunan Peoples R China|Katholieke Univ Leuven Dept Chem Engn Celestijnenlaan 200F B-3001 Leuven Belgium;

    Hunan Inst Sci & Technol Coll Chem & Chem Engn Yueyang 414006 Hunan Peoples R China;

    Delft Univ Technol Fac Civil Engn & Geosci Delft Netherlands;

    Hunan Inst Sci & Technol Coll Chem & Chem Engn Yueyang 414006 Hunan Peoples R China;

    Hunan Inst Sci & Technol Coll Chem & Chem Engn Yueyang 414006 Hunan Peoples R China;

    Hunan Inst Sci & Technol Coll Chem & Chem Engn Yueyang 414006 Hunan Peoples R China;

    Hunan Inst Sci & Technol Coll Chem & Chem Engn Yueyang 414006 Hunan Peoples R China;

    Hunan Inst Sci & Technol Coll Chem & Chem Engn Yueyang 414006 Hunan Peoples R China;

    Katholieke Univ Leuven Dept Chem Engn Celestijnenlaan 200F B-3001 Leuven Belgium|Tshwane Univ Technol Fac Engn & Built Environm Private Bag X680 ZA-0001 Pretoria South Africa;

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  • 正文语种 eng
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  • 关键词

    Carboxyl modified polyvinyl alcohol; Selective Adsorption; Heavy metal ion; Metal ions separation;

    机译：羧基改性聚乙烯醇;选择性吸附;重金属离子;金属离子分离;

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