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[1]吴丽瑞,严园园,胡煜,等.树脂负载PEI复合吸附剂对Cr(Ⅵ)的吸附去除性能研究[J].南京工业大学学报(自然科学版),2020,42(02):173-180.[doi:10.3969/j.issn.1671-7627.2020.02.006]
 WU Lirui,YAN Yuanyuan,HU Yu,et al.Removal of Cr(Ⅵ)by an adsorption with polyethyleneimine-loaded chloromethylated polystyrene resin[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2020,42(02):173-180.[doi:10.3969/j.issn.1671-7627.2020.02.006]
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树脂负载PEI复合吸附剂对Cr(Ⅵ)的吸附去除性能研究()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
42
期数:
2020年02期
页码:
173-180
栏目:
出版日期:
2020-03-22

文章信息/Info

Title:
Removal of Cr(Ⅵ)by an adsorption with polyethyleneimine-loaded chloromethylated polystyrene resin
文章编号:
1671-7627(2020)02-0173-08
作者:
吴丽瑞严园园胡煜王海玲聂广泽
南京工业大学 环境科学与工程学院,江苏 南京 211800
Author(s):
WU LiruiYAN Yuanyuan HU Yu WANG Hailing NIE Guangze
School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211800, China
关键词:
聚乙烯亚胺(PEI) 纳米复合吸附剂 重金属铬Cr(Ⅵ) 废水处理 吸附
Keywords:
polyethyleneimine(PEI) nanocomposite adsorbent Cr(Ⅵ) wastewater treatment adsorption随着现代工农业的发展人们的生活水平不断提高随之而来的环境污染问题也日益凸显。如含重金属离子废水的大量排放使水体和土壤都受到了严重的污染这直接危害到了人们的健康[1]。Cr(Ⅵ)是一种典型的有毒重金属也是主要的环境污染物之一。人和动物主要通过3种途径摄入Cr(Ⅵ):吸入、食入和接触。研究表明Cr(Ⅵ)会干扰酶体系引发“三致”作用:致突变、致癌、致畸[2]
分类号:
X703.1
DOI:
10.3969/j.issn.1671-7627.2020.02.006
文献标志码:
A
摘要:
为了克服溶解性的聚乙烯亚胺(PEI)吸附重金属离子后难于从水中分离的应用难点,本文将PEI大分子通过戊二醛进行交联,使之固定到树脂的网状结构当中,制备负载PEI的纳米复合吸附剂(PEI-CMPS),并通过序批式静态吸附实验考察其对水中重金属Cr(Ⅵ)的吸附效果。结果表明:PEI-CMPS在酸性条件下能够更好地吸附Cr(Ⅵ),其吸附行为符合Langmuir模型,并且在14 h左右达到平衡,动力学行为符合准二级模型; 在Cl-、NO3-、SO2-4等竞争离子存在下,PEI-CMPS对Cr(Ⅵ)具备良好的吸附选择性。该复合吸附剂用NaOH进行脱附后可重复使用,但再生后的材料对Cr(Ⅵ)的吸附量明显下降。
Abstract:
A nanocomposite adsorbent named PEI-CMPS was fabricated by loading soluble polyethyleneimine(PEI)onto the chloromethylated polystyrene(CMPS)resin to overcome the application bottleneck that PEI is difficult to separate from water. Batch adsorption experiments were performed to evaluate the adsorption performance of PEI-CMPS for Cr(Ⅵ)removal. The adsorbent could retain Cr(Ⅵ)better under acidic conditions. The adsorption behavior of the adsorbent for Cr(Ⅵ)was in accordance with the Langmuir model and the pseudo-second-order model, and it could be in equilibrium within 14 hours. Competition experiments showed that PEI-CMPS had a good adsorption selectivity for Cr(Ⅵ). When the NaOH solution was employed as the regenerant, PEI-CMPS could be reused but with a significant capacity loss.

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备注/Memo

备注/Memo:
收稿日期:2018-07-28
基金项目:国家自然科学基金(21507060)
作者简介:吴丽瑞(1995—),女,E-mail:756614653@qq.com; 聂广泽(联系人),助理教授,E-mail:gznie@njtech.edu.cn.
引用格式:吴丽瑞,严园园,胡煜,等.树脂负载PEI复合吸附剂对Cr(Ⅵ)的吸附去除性能研究[J].南京工业大学学报(自然科学版),2020,42(2):173-180.
WU Lirui, YAN Yuanyuan, HU Yu, et al. Removal of Cr(Ⅵ)by an adsorption with polyethyleneimine-loaded chloromethylated polystyrene resin[J].Journal of Nanjing Tech University(Natural Science Edition),2020,42(2):173-180..
更新日期/Last Update: 2020-03-20