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Adsorption of Ni(II) using amine-functionalized MCM-41 optimized by response surface methodology

机译：响应面法优化的胺官能化MCM-41吸附Ni（II）

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摘要

Adsorption of Ni(II) by amine-functionalized MCM-41 (NH2-MCM-41) was studied with response surface methodology (RSM) employed to optimize the adsorption process. The independent variables include pH, metal concentration, temperature, and adsorbent dosage. Analysis of variance (ANOVA) of RSM indicated that the obtained second-order polynomial model was appropriate to predict the adsorption process. Meanwhile, the maximum removal efficiency for Ni(II) was 93.20%, which was achieved at pH 6.50, metal concentration 10.00 mg/L, temperature 35 degrees C, and adsorbent dosage 5.00g/L. The kinetic study revealed that the pseudo-second-order kinetic model could describe the experimental data better. While the intraparticle diffusion model suggested three stages of the adsorption process. In addition, the adsorption data conformed well to Langmuir isotherm model. Thermodynamic study implied the adsorption process was spontaneous and endothermic. The adsorption-desorption experiment showed that NH2-MCM-41 held good reusability.
机译：利用响应面法（RSM）研究了胺官能化MCM-41（NH2-MCM-41）对Ni（II）的吸附，以优化吸附过程。独立变量包括pH，金属浓度，温度和吸附剂剂量。 RSM的方差分析（ANOVA）表明，所获得的二阶多项式模型适合预测吸附过程。同时，Ni（II）的最大去除效率为93.20％，这是在pH 6.50，金属浓度10.00 mg / L，温度35℃，吸附剂量5.00g / L的条件下实现的。动力学研究表明，伪二级动力学模型可以更好地描述实验数据。而粒子内扩散模型建议了吸附过程的三个阶段。另外，吸附数据与Langmuir等温线模型吻合良好。热力学研究表明吸附过程是自发的和吸热的。吸附-解吸实验表明，NH2-MCM-41具有良好的可重复使用性。

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  • 来源
    《Desalination and water treatment》 |2016年第18期|8526-8539|共14页
  • 作者

    Yang Shengxin; Wu Yunhai; Aierken Ayinigaer; Zhang Meili; Wu Yunying;

  • 作者单位

    Hohai Univ, Coll Environm, Xikang Rd 1, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Minist Educ, Key Lab Integrated Regulat & Resources Dev Shallo, Xikang Rd 1, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Coll Environm, Xikang Rd 1, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Coll Environm, Xikang Rd 1, Nanjing 210098, Jiangsu, Peoples R China;

    Hanshan Normal Univ, Dept Chem, Chaozhou, Guangdong, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Isotherm; Kinetic; Ni(II); NH2-MCM-41; Response surface methodology;

    机译：等温线;动力学;Ni（II）;NH2-MCM-41;响应面法;

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