研究报告

  • 孔巧平,李乐利,麻微微,施雪卿.氨基修饰氧化石墨烯-羧甲基纤维素复合吸附剂的制备及其对Cr (VI)的吸附性能研究[J].环境科学学报,2021,41(10):4003-4012

  • 氨基修饰氧化石墨烯-羧甲基纤维素复合吸附剂的制备及其对Cr (VI)的吸附性能研究
  • Preparation of amino modified graphene oxide-carboxymethyl cellulose composite adsorbent and its adsorption performance towards Cr(VI)
  • 基金项目:山东省高等学校青创科技计划项目(No.2020KJD003);山东省泰山学者青年专家计划项目(No.tsqn201812091)
  • 作者
  • 单位
  • 孔巧平
  • 青岛理工大学环境与市政工程学院, 青岛 266033
  • 李乐利
  • 青岛日报报业集团, 青岛 266033
  • 麻微微
  • 青岛理工大学环境与市政工程学院, 青岛 266033
  • 施雪卿
  • 青岛理工大学环境与市政工程学院, 青岛 266033
  • 摘要:为获得价格低廉、吸附性能优良的石墨烯基吸附剂,以氧化石墨烯(GO)、羧甲基纤维素(CMC)为基材,以聚乙烯亚胺(PEI)为改性试剂,通过化学修饰的方法制备了氨基修饰氧化石墨烯-羧甲基纤维素复合吸附剂(GO-PEI-CMC).采用扫描电镜(SEM)、傅里叶红外光谱(FT-IR)及X射线光电子能谱(XPS)等表征手段证实了CMC、氧化石墨烯与PEI已成功复合.静态吸附实验表明GO-PEI-CMC对Cr (VI)表现出良好的吸附性能,由Langmuir等温吸附模型所得最大吸附量值为243.92 mg·g-1.吸附动力学、吸附等温线研究表明GO-PEI-CMC对Cr (VI)的吸附为单分子层、化学吸附过程.GO-PEI-CMC对Cr (VI)吸附性能优良,且具有绿色环保、可生物降解的优点,是一种极具潜力的Cr (VI)吸附剂.
  • Abstract:In order to obtain graphene-based adsorbents with low price and excellent adsorption performance, amino modified graphene oxide-carboxymethyl cellulose composite adsorbent (GO-PEI-CMC) was prepared by chemical modification with graphene oxide and carboxymethyl cellulose (CMC) as substrates and polyethylenimine (PEI) as modifying reagent. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) were used to characterize GO-PEI-CMC and the results indicated that CMC, graphene oxide and PEI had been successfully compounded. The static adsorption experiment showed that GO-PEI-CMC exhibited good adsorption ability for Cr(VI), and the maximum adsorption capacity calculated by Langmuir isothermal adsorption model was 243.92 mg·g-1. The adsorption kinetics and isotherm analysis results indicated that the adsorption of Cr(VI) onto GO-PEI-CMC was a monolayer and chemisorption process. GO-PEI-CMC with the characteristic of excellent adsorption performance, environmental protection and biodegradability is a potential adsorbent for the removal of Cr(VI).

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