[1]张国珍,王宏伟,李晓燕,等.紫外活化过硫酸盐降解水中阿莫西林的特性[J].中国给水排水,2021,37(19):53-59.
　ZHANG Guo-zhen,WANG Hong-wei,LI Xiao-yan,et al.Characteristics of Ultraviolet Activated Persulfate for Degradation of Amoxicillin in Water[J].China Water & Wastewater,2021,37(19):53-59.
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紫外活化过硫酸盐降解水中阿莫西林的特性

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第37卷 期数: 2021年第19期 页码: 53-59 栏目: 出版日期: 2021-10-01
Title:
Characteristics of Ultraviolet Activated Persulfate for Degradation of Amoxicillin in Water
作者:
张国珍1,2,3，王宏伟1,2，李晓燕1,2，武福平1,2，闵芮1,2，严婉铒1,2，周添红1,2
(1.兰州交通大学环境与市政工程学院，甘肃兰州730070；2.甘肃省黄河水环境重点实验室，甘肃兰州730070；3.寒旱地区水资源综合利用教育部工程研究中心，甘肃兰州730070)
Author(s):
ZHANG Guo-zhen1,2,3，WANG Hong-wei1,2，LI Xiao-yan1,2，WU Fu-ping1,2，MIN Rui1,2，YAN Wan-er1,2，ZHOU Tian-hong1,2
(1. School of Environmental and Municipal Engineering， Lanzhou Jiaotong University， Lanzhou 730070， China； 2. Key Laboratory of Yellow River Water Environment in Gansu Province， Lanzhou 730070， China； 3. Engineering Research Center for Comprehensive Utilization of Water Resource in Cold and Arid Regions ， Lanzhou 730070， China)
关键词:
紫外; 过硫酸钾; 阿莫西林; 反应动力学; 自由基
Keywords:
ultraviolet; potassium persulfate; amoxicillin; reaction kinetics; free radical
摘要:
为解决传统工艺难以有效去除水中难降解抗生素类污染物的问题，采用紫外活化过硫酸钾（UV/PPS）氧化降解水中典型抗生素类物质阿莫西林（AMX）。对比了UV/PPS联用工艺与单独UV、单独PPS工艺对AMX的降解效果，考察底物初始浓度、PPS投加量、溶液pH值、碳酸氢根离子浓度、氯离子浓度5种因素对AMX降解动力学的影响，并鉴定了反应系统的主导活性自由基。结果表明，UV/PPS联用工艺与单独UV、单独PPS工艺对AMX的降解均与准一级动力学模型相符（R2≥0.95），且UV/PPS联用工艺大大提高了AMX的降解率；底物初始浓度较低有助于AMX的降解；过硫酸盐投加量为0.5 mmol/L时，对AMX的降解率达到最大值；溶液pH值较高时UV活化PPS的反应速率更快；碳酸氢根离子和氯离子的存在均会降低反应速率，且两者对该反应的抑制作用为碳酸氢根离子＞氯离子。UV/PPS工艺中·SO4-活性自由基主导AMX的氧化降解。
Abstract:
As the traditional process was difficult to effectively remove the refractory antibiotic pollutants in water, the ultraviolet activated potassium persulfate (UV/PPS) was thus applied to oxidize and degrade the typical antibiotic substance amoxicillin (AMX) in the water. The performances of the combined UV/PPS process, single UV and single PPS for the removal of AMX were compared. The effects of five factors including initial substrate concentration, PPS dosage, pH of the solution, bicarbonate ion concentration and chloride ion concentration on the degradation kinetics of the AMX were investigated, and the dominant active free radical in the reaction system was identified. The degradation of the AMX by the combined UV/PPS process, single UV process and single PPS process were all consistent with the quasi-first-order kinetic model (R2≥0.95), and the combined UV/PPS process greatly improved the removal efficiency of the AMX. The lower initial concentration of the substrate was conductive to the degradation of the AMX, and the maximum removal efficiency of the AMX was obtained when the persulfate dosage was 0.5 mmol/L. The reaction rate of the PPS activated by UV was faster when the pH of the solution was higher. The presence of HCO3- or Cl- both decreased the reaction rate, and the inhibition of HCO3- on the reaction was greater than that of Cl-. In the UV/PPS process, ·SO4- active free radical dominated the oxidative degradation of the AMX.

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[1]雷晨,许路,张琼华,等.紫外活化过硫酸盐技术用于污水厂二级出水深度处理[J].中国给水排水,2020,36(15):86.
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更新日期/Last Update: 2021-10-01