响应曲面优化胺化树脂吸附头孢曲松钠的性能  

Response Surface Optimization of Amination Resin for the Adsorption of Ceftriaxone Sodium

作　　者：戈晓东 孟冠华 刘宝河 杨建华 朱晨晨 张林森 GE Xiaodong;MENG Guanhua;LIU Baohe;YANG Jianhua;ZHU Chenchen;ZHANG Linsen(School of Energy and Environment,Anhui University of Technology,Ma'anshan 234002,China;School of Foreign Languages,Anhui University of Technology,Ma'anshan 234002,China)

机构地区：[1]安徽工业大学能源与环境学院,安徽马鞍山234002 [2]安徽工业大学外国语学院,安徽马鞍山234002

出　　处：《环境科学与技术》2022年第9期71-82,共12页Environmental Science & Technology

基　　金：安徽高校自然科学研究重点项目(KJ2017A065);2017年度高校优秀骨干青年人才国内外访学研修项目(gxfx2017019)。

摘　　要：头孢曲松钠(CS)是常用的抗生素,在地表水和污水厂排水中经常被检出。为提升吸附树脂对CS的吸附性能,该研究通过Friedel-Crafts反应和化学修饰的方法,以低交联度的聚苯乙烯-二乙烯苯树脂为骨架,制备了氨基修饰的超高交联吸附树脂GNH-01。SEM-EDS、BET和FTIR表征结果显示,树脂表面有疏松的小孔,富有含氧和含氮官能团,比表面积较大。以CS为目标污染物,考察了时间、温度、初始浓度、pH、投加量等因素对GNH-01吸附性能的影响,并结合吸附动力学提出了吸附机制。结果表明:在初始浓度为40 mg/L、投加量为1 g/L、温度为30℃、pH=6.18时,吸附效果最好:吸附量为38.62 mg/g,去除率为96.55%。动力学研究表明,吸附过程符合拟二级动力学方程(R^(2)>0.98)。CS在GNH-01上既有物理吸附也有化学吸附,功能基团的引入提升了树脂的吸附性能。此外,氢键作用也增加了吸附过程的吸附量。采用响应曲面法Box-Behnken模型优化了实验条件,探讨了各因素及其交互作用对去除率的影响,确定了最佳吸附条件。以5.00%NaOH溶液为脱附液,GNH-01树脂脱附效果较好,可被重复使用。该研究为CS废水资源化处理中的应用提供了机制依据及数据支撑。Ceftriaxone sodium(CS)is a commonly used antibiotic drug that is frequently detected in surface water and sewage plant drainage.To enhance the adsorption performance of the adsorbent resin for CS,the amino-modified oxygenated ultra-high cross-linked adsorbent resin GNH-01 was prepared by Friedel-Crafts reaction and chemical modification using a low cross-linked polystyrene-divinylbenzene resin(CMCPS)as the backbone.Characterization analysis showed that the resin surface has loose small pores,large specific surface area,and abundant for-vacancy structure,and the surface is rich in oxygen-and nitrogen-containing functional groups.The effects of time,temperature,initial concentration,solution p H and resin dosage on the adsorption effect were investigated with CS as the target pollutant,and the adsorption mechanism was proposed in combination with the adsorption kinetics.The results showed that the best adsorption effect was achieved at an initial concentration of 40 mg/L,a dosage of 1 g/L,a temperature of 30℃and pH 6.18(Qe=38.62 mg/g,removal rate 96.55%).The kinetic study showed that the adsorption process was in good agreement with the proposed secondary kinetic equation(R^(2)>0.98).CS was both physisorbed and chemisorbed on the resin.The introduction of functional groups enhanced the adsorption performance of the resin due to the charge interaction between the adsorbent and CS.In addition,the hydrogen bonding interaction also increased the adsorption amount of the adsorption process.The Box-Behnken model of response surface method was used to optimize the experimental conditions,and the effects of the factors and their interactions on the adsorption effect were explored to determine the optimal adsorption conditions.Using 5.00%NaOH solution as its desorption solution,the GNH-01 resin was regenerated with good effect and could be reused.This study provides a mechanistic basis and data support for the application in CS wastewater resource treatment.

关 键 词：聚苯乙烯-二乙烯苯 头孢曲松钠 吸附 动力学 响应曲面法 

分 类 号：X703[环境科学与工程—环境工程]