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五乙烯六胺改性柿单宁金属吸附剂对Pd(Ⅱ)的吸附回收

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闵慧玉, 易庆平, 樊睿怡, 洪星星, 张青林, 罗正荣. 五乙烯六胺改性柿单宁金属吸附剂对Pd(Ⅱ)的吸附回收[J]. 环境化学, 2019, (8): 1775-1784. doi: 10.7524/j.issn.0254-6108.2018100902
引用本文: 闵慧玉, 易庆平, 樊睿怡, 洪星星, 张青林, 罗正荣. 五乙烯六胺改性柿单宁金属吸附剂对Pd(Ⅱ)的吸附回收[J]. 环境化学, 2019, (8): 1775-1784. doi: 10.7524/j.issn.0254-6108.2018100902
shu
MIN Huiyu, YI Qingping, FAN Ruiyi, HONG Xingxing, ZHANG Qinglin, LUO Zhengrong. Adsorptive characteristics and performance of pentaethylenehexamine modified persimmon power formaldehyde resin biosorbent for Pd(Ⅱ) recovery[J]. Environmental Chemistry, 2019, (8): 1775-1784. doi: 10.7524/j.issn.0254-6108.2018100902
Citation: MIN Huiyu, YI Qingping, FAN Ruiyi, HONG Xingxing, ZHANG Qinglin, LUO Zhengrong. Adsorptive characteristics and performance of pentaethylenehexamine modified persimmon power formaldehyde resin biosorbent for Pd(Ⅱ) recovery[J]. Environmental Chemistry, 2019, (8): 1775-1784. doi: 10.7524/j.issn.0254-6108.2018100902
shu

五乙烯六胺改性柿单宁金属吸附剂对Pd(Ⅱ)的吸附回收

  • 1. 华中农业大学, 园艺植物生物学教育部重点实验室, 武汉, 430070;

  • 2. 荆楚理工学院生物工程学院, 荆门, 448000;

  • 3. 广东省农业科学院果树研究所, 农业部南亚热带果树生物学与遗传资源利用重点实验室, 广州, 510640;

  • 4. 黄冈师范学院, 大别山特色资源开发湖北省协同创新中心, 黄冈, 438000

    • 通讯作者: 易庆平, E-mail: jmyiqingping@126.com ;  罗正荣, E-mail: luozhr@mail.hzau.edu.cn
  • 基金项目:

    大别山特色资源开发湖北省协同创新中心项目（2015TD01）和湖北省教育厅科学技术研究项目（D20174302）资助.

Adsorptive characteristics and performance of pentaethylenehexamine modified persimmon power formaldehyde resin biosorbent for Pd(Ⅱ) recovery

  • 1. Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan, 430070, China;

  • 2. College of Bioengineering, Jingchu University of Technology, Jingmen, 448000, China;

  • 3. Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization of the Ministry of Agriculture, Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China;

  • 4. Hubei Collaborative Innovation Center for the Characteristic Resources Exploitation of Dabie Mountains, Huanggang Normal University, Huanggang, 438000, China

    • Corresponding authors: YI Qingping, jmyiqingping@126.com ;  LUO Zhengrong, luozhr@mail.hzau.edu.cn
  • Fund Project: Supported by Hubei Collaborative Innovation Center for the Characteristic Resources Exploitation of Dabie Mountains (2015TD01) and Scientific Research Project of Hubei Provincical Dapartment of Education (D20174302).

  • 摘要: 为提高柿单宁金属吸附剂对贵金属Pd（Ⅱ）的吸附能力，采用五乙烯六胺（PEHA）改性柿粉甲醛树脂（PPFR），获得新型柿单宁金属吸附剂PH-PPFR.通过静态吸附、动态吸附以及SEM、FTIR、XRD和XPS等表征手段探讨其对Pd（Ⅱ）的吸附效应.结果表明，不同酸性溶液中改性后PH-PPFR对Pd（Ⅱ）的吸附量均显著高于未改性PPFR，PH-PPFR在盐酸浓度高达4.0 mol·L-1的条件下仍有较强吸附能力.PH-PPFR对Pd（Ⅱ）的吸附过程符合拟二级吸附动力学过程；等温线数据对Langmuir模型线性拟合系数R2均达到0.999，理论吸附最大值为263.16 mg·g-1.模拟线路板含钯液柱吸附-解吸附结果显示PH-PPFR对Pd（Ⅱ）的吸附具有极高的选择性，吸附后的Pd（Ⅱ）很容易被酸性硫脲洗脱.结合表征分析，推测吸附机理主要为表面螯合和氧化还原反应，同时受到阴离子交换反应及静电作用的影响，胺基基团和酚羟基为主要参与官能团.PH-PPFR制备方法简单、易行，对Pd（Ⅱ）表现出高吸附容量和选择吸附性，可实现盐酸体系下对电子废物酸浸液中贵金属Pd（Ⅱ）的高效富集和分离.
    Abstract: To improve the adsorption efficiency of persimmon tannin adsorbent, pentaethylenehexamine (PEHA) was grafted on the surface of persimmon powder formaldehyde resin (PPFR) to synthesize a new biosorbent named PH-PPFR. The biosorbent was characterized by FTIR, SEM, XRD and XPS, and the adsorption performance of PH-PPFR was evaluated through batch and dynamic adsorption tests. According to the experimental data, PH-PPFR showed higher adsorption capacity to Pd(Ⅱ) than PPFR, with a tolerance of strong acid condition as high as 4.0 mol·L-1 HCl solution. The pseudo-second-order model was appropriate for fitting the kinetic experimental data of PH-PPFR, and the adsorption isotherm was well fitted with Langmuir model (R2>0.999), which indicated that adsorption process took place on the surface of the adsorbent, and the maximum adsorption capacity was as high as 263.16 mg·g-1. The column adsorption-desorption experiment showed high adsorption selectivity and the adsorbed Pd(Ⅱ) ions could be easily desorbed with acidic thiourea. The main adsorption mechanism was proposed to be chelation and redox reaction between Pd(Ⅱ) and hydroxyl/amine groups on PH-PPFR, which was accompanied with negative ion-exchange and electrostatic adsorption. with easy synthesis, high adsorption capacity and efficiency, PH-PPFR is a promising sorbent for the enrichment and separation of Pd (Ⅱ) in HCl solution.
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  • 收稿日期:  2018-10-09
闵慧玉, 易庆平, 樊睿怡, 洪星星, 张青林, 罗正荣. 五乙烯六胺改性柿单宁金属吸附剂对Pd(Ⅱ)的吸附回收[J]. 环境化学, 2019, (8): 1775-1784. doi: 10.7524/j.issn.0254-6108.2018100902
引用本文: 闵慧玉, 易庆平, 樊睿怡, 洪星星, 张青林, 罗正荣. 五乙烯六胺改性柿单宁金属吸附剂对Pd(Ⅱ)的吸附回收[J]. 环境化学, 2019, (8): 1775-1784. doi: 10.7524/j.issn.0254-6108.2018100902
shu
MIN Huiyu, YI Qingping, FAN Ruiyi, HONG Xingxing, ZHANG Qinglin, LUO Zhengrong. Adsorptive characteristics and performance of pentaethylenehexamine modified persimmon power formaldehyde resin biosorbent for Pd(Ⅱ) recovery[J]. Environmental Chemistry, 2019, (8): 1775-1784. doi: 10.7524/j.issn.0254-6108.2018100902
Citation: MIN Huiyu, YI Qingping, FAN Ruiyi, HONG Xingxing, ZHANG Qinglin, LUO Zhengrong. Adsorptive characteristics and performance of pentaethylenehexamine modified persimmon power formaldehyde resin biosorbent for Pd(Ⅱ) recovery[J]. Environmental Chemistry, 2019, (8): 1775-1784. doi: 10.7524/j.issn.0254-6108.2018100902
shu

五乙烯六胺改性柿单宁金属吸附剂对Pd(Ⅱ)的吸附回收

    通讯作者: 易庆平, E-mail: jmyiqingping@126.com ;  罗正荣, E-mail: luozhr@mail.hzau.edu.cn
  • 1. 华中农业大学, 园艺植物生物学教育部重点实验室, 武汉, 430070;
  • 2. 荆楚理工学院生物工程学院, 荆门, 448000;
  • 3. 广东省农业科学院果树研究所, 农业部南亚热带果树生物学与遗传资源利用重点实验室, 广州, 510640;
  • 4. 黄冈师范学院, 大别山特色资源开发湖北省协同创新中心, 黄冈, 438000
  • 收稿日期:  2018-10-09
基金项目:

大别山特色资源开发湖北省协同创新中心项目（2015TD01）和湖北省教育厅科学技术研究项目（D20174302）资助.

摘要: 为提高柿单宁金属吸附剂对贵金属Pd（Ⅱ）的吸附能力，采用五乙烯六胺（PEHA）改性柿粉甲醛树脂（PPFR），获得新型柿单宁金属吸附剂PH-PPFR.通过静态吸附、动态吸附以及SEM、FTIR、XRD和XPS等表征手段探讨其对Pd（Ⅱ）的吸附效应.结果表明，不同酸性溶液中改性后PH-PPFR对Pd（Ⅱ）的吸附量均显著高于未改性PPFR，PH-PPFR在盐酸浓度高达4.0 mol·L-1的条件下仍有较强吸附能力.PH-PPFR对Pd（Ⅱ）的吸附过程符合拟二级吸附动力学过程；等温线数据对Langmuir模型线性拟合系数R2均达到0.999，理论吸附最大值为263.16 mg·g-1.模拟线路板含钯液柱吸附-解吸附结果显示PH-PPFR对Pd（Ⅱ）的吸附具有极高的选择性，吸附后的Pd（Ⅱ）很容易被酸性硫脲洗脱.结合表征分析，推测吸附机理主要为表面螯合和氧化还原反应，同时受到阴离子交换反应及静电作用的影响，胺基基团和酚羟基为主要参与官能团.PH-PPFR制备方法简单、易行，对Pd（Ⅱ）表现出高吸附容量和选择吸附性，可实现盐酸体系下对电子废物酸浸液中贵金属Pd（Ⅱ）的高效富集和分离.

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