改性煤渣用于吸附去除废水中磺胺抗生素  

Modified coal cinder was prepared for adsorption and removal of sulfonamides antibiotics in wastewater

作　　者：周良芹 张奥 王蓉 范金龙 付大友 ZHOU Liangqin;ZHANG Ao;WANG Rong;FAN Jinlong;FU Dayou(School of Chemical Engineering,Sichuan University of Science and Engineering,Zigong 643000,China;School of Materials Science and Engineering,Sichuan University of Science and Engineering,Zigong 643000,China)

机构地区：[1]四川轻化工大学化学工程学院,四川自贡643000 [2]四川轻化工大学材料科学与工程学院,四川自贡643000

出　　处：《应用化工》2024年第6期1305-1309,共5页Applied Chemical Industry

基　　金：四川省科技厅重点项目(2020YFS0347);精细化工助剂及表面活性剂四川省高校重点实验室项目(2017JXY01);绿色催化四川省高校重点实验室项目(LZJ1704)。

摘　　要：为提升废弃煤渣的使用价值,提高其对水中抗生素的去除效果,以氯化铁溶液为改性剂,通过设计正交实验,对煤渣的改性条件进行优化,并研究了吸附剂用量、溶液pH值对最佳条件下制备的改性煤渣吸附抗生素的影响,最后对吸附过程进行了动力学和热力学分析。结果表明,煤渣的最佳改性条件为:粒径40~100目,煅烧温度200℃,固液比1∶8,改性时间4 h;吸附抗生素的实验中,随着吸附剂用量增加,磺胺嘧啶(SD)和磺胺噻唑(STZ)的去除率增大,吸附量降低;溶液在弱酸和中性条件下有利于改性煤渣吸附去除SD和STZ;吸附过程符合准二级动力学模型和Langmuir等温模型;热力学参数显示该吸附过程为放热、自发的;对SD和STZ的最大吸附量分别为0.4052,0.6620 mg/g,提升至原始煤渣的7.8倍和4.8倍。The orthogonal experiment was employed to optimize the modified conditions of coal cinder by FeCl_(3),so as to improve the utilization value of waste coal cinder and enhance the removal effect of antibiotics in waste water.Effects of the dosage of modified coal cinder and solution pH were researched.In addition,adsorption kinetics and isotherm of modified coal cinder on sulfadiazine(SD)and sulfathiazole(STZ)was investigated.The results showed that the optimal modification conditions were following:particle size is 40~100 mush,calcination temperature is 200℃,solid-to-liquid ratio is 1∶8 and modification time is 4 h.With the increase of the amount of adsorbent,the removal rate of SD and STZ increased but the adsorption amount decreased.The weak acid and neutral conditions are conducive to the adsorption of SD and STZ by modified cinder.This adsorption reaction was consist with quasi-secondary kinetic and Langmuir isotherm models,and was a spontaneous,exothermic process.The maximum adsorption capacity modified coal cinder on SD and STZ was 0.4052 mg/g and 0.6620 mg/g,respectively,which increased to 7.8 and 4.8 times of the original cinder.

关 键 词：煤渣 抗生素 磺胺 吸附 氯化铁 

分 类 号：TQ424[化学工程] TQ13[矿业工程—矿井通风与安全] TD75