功能化氮杂环卡宾聚合树脂对Cu^(2+)的吸附研究  

Study on Adsorption of Functional Nitrogen Heterocyclic Carbene Polymeric Resin for Cu^(2+)

作　　者：伍婵翠[1] 蔡怀然 李学军[1] 陈培博 黄健 梁英[1] WU Chancui;CAI Huairan;LI Xuejun;CHEN Peibo;HUANG Jian;LIANG Ying(School of Life and Environmental Science,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学生命与环境科学学院,广西桂林541004

出　　处：《环境科学与技术》2024年第3期208-218,共11页Environmental Science & Technology

基　　金：国家自然科学基金项目(41965006);桂林电子科技大学科研基金项目(UF19018Y)。

摘　　要：该研究制备了功能化氮杂环卡宾聚合树脂(PNO),旨在去除废水中Cu^(2+);基于静态和动态吸附实验,研究了PNO对废水中Cu^(2+)的吸附效果。结果表明:PNO对Cu^(2+)的最佳吸附条件为吸附剂投加量100 mg、吸附时间30 min、pH值4.0~5.9、温度298 K、转速150 r/min,最大吸附量为51.55 mg/g。PNO对Cu^(2+)的吸附过程符合Langmuir、Freundlich等温吸附模型和准二级动力学模型。动态吸附量随柱高增加、流速降低和进水Cu^(2+)浓度增加而增大。使用Thomas和Bohart-Adams模型拟合,相关系数R^(2)均大于0.92,预测值与实验值相符。经过5次静态吸附-解吸和3次动态循环再生后,PNO对Cu^(2+)的去除率仍达到第一次循环的96%以上,去除效果和再生性能良好。PNO对含铜废水高效处理具有广泛的应用前景。The functional nitrogen heterocyclic carbene polymeric resin(PNO)was synthesized for the removal of Cu^(2+)from wastewater.Based on static and dynamic adsorption experiments,the adsorption effect of PNO on Cu^(2+)in wastewater was studied.The results showed that the optimal adsorption conditions of PNO for Cu^(2+)were as 100 mg of adsorbent dosage,30 minutes of adsorption time,4~5.9 of pH,a temperature of 298 K,and a rotational speed of 150 r/min.The maximum adsorption capacity was 51.55 mg/g.The adsorption process was consistent with the Langmuir and Freundlich isothermal adsorption models,as well as the pseudo-second-order kinetic model.The dynamic adsorption capacity increased with the decrease in flow velocity,the increase in column height,and Cu^(2+)concentration.Thomas and Bohart-Adams models'results indicated that the predicted values were consistent with the experimental data(R^(2)>0.92).After 5 rounds of static adsorption and desorption,and 3 cycles of dynamic regeneration,the removal rate still exceeded 96%of the initial cycle,indicating effec⁃tive removal and regeneration capabilities.This study highlighted that PNO had a wide application prospect for the efficient treatment of copper-containing wastewater.

关 键 词：功能化氮杂环卡宾聚合树脂 Cu^(2+) 吸附性能 吸附模型 

分 类 号：X703[环境科学与工程—环境工程]