磁性壳聚糖微球对酸性嫩黄G吸附行为的研究  

Investigation of adsorption behavior of magnetic chitosan microspheres to acid light yellow G

作　　者：朱明新 张进雨 陈贝贝 刘家扬 潘顺龙 周华 ZHU Mingxin;ZHANG Jinyu;CHEN Beibei;LIU Jiayang;PAN Shunlong;ZHOU Hua(School of Environmental Science and Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]南京工业大学环境科学与工程学院,江苏南京211816

出　　处：《工业水处理》2023年第2期61-67,共7页Industrial Water Treatment

基　　金：国家自然科学基金项目(52000102);江苏省自然科学基金项目(BK20190689)。

摘　　要：随着我国工业化进程的快速推进,大量印染废水随之产生。印染废水具有色度高、有机物含量高、难降解等特点,且存在致畸、致癌等健康风险,对环境和人类健康造成极大危害。本研究采用反相乳液法制备了磁性壳聚糖微球(MCPs),并系统研究了其对酸性嫩黄G染料的吸附行为。结果表明,MCPs对酸性嫩黄G的平衡吸附量(q e)随染料初始浓度的增大而增大,随pH的减小而增大。在MCPs添加量为0.05 g、染料初始质量浓度为1000 mg/L、溶液体积为50 mL、pH为3.5、吸附时间为24 h的条件下,MCPs对酸性嫩黄G的吸附量达到272.86 mg/g。在时间尺度上,前200 min内MCPs对酸性嫩黄G的吸附量随时间延长迅速增加,200~480 min时吸附速率逐渐降低,480 min后吸附基本达到平衡。吸附动力学表明,MCPs对酸性嫩黄G的吸附过程符合准二级动力学模型,属于化学吸附。Langmuir模型相关系数高达0.9249,表明MCPs吸附酸性嫩黄G的过程为单分子层吸附。本研究可为MCPs在印染废水处置领域的基础及应用研究提供一定思路。With the rapid progress of industrialization of China,a large number of dyeing waste water was produced.The dyeing waste water was endowed the characteristics of high chroma,high organic content and difficult to degrada⁃tion.At the same time,there were series of health risks such as teratogenicity and carcinogenicity of dyeing waste wa⁃ter,resulting in great harm to environment and human health.This work aimed to fabricate magnetic chitosan micro⁃spheres(MCPs)by reversed emulsion method,and systematically investigated adsorption behaviors of MCPs to acid light yellow G.The results showed that the equilibrium adsorption capacity(qe)increased with the increase of initial dye concentration and decrease of pH for the dye solution.When the preparation conditions were as follows:MCPs addition 0.05 g,initial dye concentration 1000 mg/L,volume of the dye solution 50 mL,pH 3.5 and adsorption time 24 h,MCPs exhibited adsorption capacity of 272.86 mg/g.On time scales,the adsorption capacity of MCPs for acid yellow G increased with time in 200 min,while the adsorption rate gradually decreased from 200 min to 480 min,and the adsorption process almost reached equilibrium state after 480 min.The investigation of adsorption kinetics con⁃firmed that the adsorption process conformed to quasi second-order kinetic model,which belonged to chemical ad⁃sorption.The investigation of adsorption isotherm model implied that the correlation coefficient of the adsorption pro⁃cess to Langmuir model was high to 0.9249,suggesting a mono-layer adsorption of this process.This work could pro⁃vide some ideas for the theoretical and applied researches of MCPs in the field of dyeing water treatment.

关 键 词：壳聚糖 磁性微球 染料 吸附 吸附模型 

分 类 号：X703[环境科学与工程—环境工程] TQ424[化学工程]