高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (4): 20220695.doi: 10.7503/cjcu20220695

• 高分子化学 • 上一篇    下一篇

羧基功能化微滤膜PSF-g-PMAA的制备及对三嗪类除草剂的截留去除性能

杜瑞奎(), 高保娇, 门吉英   

  1. 中北大学材料科学与工程学院, 太原 030051
  • 收稿日期:2022-11-05 出版日期:2023-04-10 发布日期:2022-12-12
  • 通讯作者: 杜瑞奎 E-mail:dukui1107@163.com
  • 基金资助:
    国家自然科学基金(21805249)

Carboxyl Functionalized Microfiltration Membrane PSF-g-PMAA: Preparation, Rejection and Removal Properties for Triazine Herbicides

DU Ruikui(), GAO Baojiao, MEN Jiying   

  1. School of Materials Science and Engineering,North University of China,Taiyuan 030051,China
  • Received:2022-11-05 Online:2023-04-10 Published:2022-12-12
  • Contact: DU Ruikui E-mail:dukui1107@163.com
  • Supported by:
    the National Natural Science Foundation of China(21805249)

摘要:

使用过硫酸盐在胺基化的氯甲基化聚砜微滤膜表面形成—NH2/S2O82-氧化还原引发体系, 将甲基丙烯酸(MAA)接枝聚合到聚砜微滤膜表面, 得到羧基功能化PSF-g-PMAA微滤膜. 采用等温吸附和渗透实验, 考察了PSF-g-PMAA膜对三嗪类除草剂(扑草净、 莠灭净、 阿特拉津)的截留去除性能. 结果表明, 基于静电相互作用和氢键的协同吸附作用, PSF-g-PMAA膜对三嗪类除草剂显示出良好的去除效果, 其中对莠灭津的最大吸附量达到0.18 μmol/cm2(41 μg/cm2). 采用膜面积为1.77 cm2的注射过滤器, PSF-g-PMAA膜对浓度为0.8 mg/L的三嗪类除草剂溶液的截留率接近100%(渗透液体积100 mL).

关键词: 接枝微滤膜, 甲基丙烯酸, 三嗪类除草剂, 截留, 去除

Abstract:

A redox surface-initiating system of —NH2/S2O82- was constituted at the interface of amine-based chloromethylated polysulfone(CMPSF) microfiltration membrane by using persulfate. MAA was graft-polymerized on the surface of microfiltration membrane by using the surface-initiating graft-polymerization method, and the grafted microfiltration membrane of PSF-g-PMAA was obtained. The rejection and removing performance of PSF-g-PMAA membrane for the three triazine herbicides(ametryn, prometryn and atrazine) from water was examined by using isothermal adsorption experiments and the permeation experiments. The experimental results show that PSF-g-PMAA membrane has strong removal properties for the three triazine herbicides under the synergy adsorption of electrostatic interaction and hydrogen bond interaction, and the maximum adsorption capacity of PSF-g-PMAA membrane for ametryn can reach up to 0.18 μmol/cm2(41 μg/cm2). Using an injection filter with a membrane area of 1.77 cm2, the rejection rate of PSF-g-PMAA membrane for the solutions of the three triazine herbicides with a concentration of 0.8 mg/L can be closed to 100% under 100 mL of penetrating liquids.

Key words: Grafted-microfiltration membrane, Methacrylic acid, Triazine herbicides, Rejection, Removal

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