CSB-BOC活化PMS去除河流缓集区水中盐酸四环素的性能及机理

何西; 刘晨; 李婧璐; 陈明; B. Larry LI

doi:10.13205/j.hjgc.202402010

CSB-BOC活化PMS去除河流缓集区水中盐酸四环素的性能及机理

doi: 10.13205/j.hjgc.202402010

何西^1,2,3,
刘晨²,
李婧璐⁴,
陈明^2, ,,
B. Larry LI⁵

1. 重庆交通大学, 重庆 400074;
2. 中国科学院重庆绿色智能技术研究院, 重庆 400714;
3. 中国科学院大学重庆学院, 重庆 400714;
4. Department of Civil and Environmental Engineering, Imperial College London, London SW7 2BU, UK;
5. Ecological Complexity and Modeling Laboratory, University of California, California CA 92521-0124, USA

基金项目:

国家自然科学基金面上项目(52170060)

重庆市自然科学基金(cstc2021jcyj-msxmX0163)

详细信息

作者简介:
何西(1996-),女,硕士研究生,主要研究方向为水环境修复。hexi@cigit.ac.cn

通讯作者:
陈明,男,硕导,主要研究方向为水环境修复。chenming@cigit.ac.cn

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出版历程
- 收稿日期: 2022-09-13
- 网络出版日期: 2024-04-28

PERFORMANCE AND MECHANISM OF CSB-BOC ACTIVATED PMS FOR REMOVAL OF TETRACYCLINE HYDROCHLORIDE IN WATER IN SLOW-GATHERING AREAS OF RIVER

HE Xi^1,2,3,
LIU Chen²,
LI Jinglu⁴,
CHEN Ming^{2
, ,},
B. Larry LI⁵

1. Chongqing Jiaotong University, Chongqing 400074, China;
2. Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China;
3. Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China;
4. Department of Civil and Environmental Engineering, Imperial College London, London SW7 2BU, UK;
5. Ecological Complexity and Modeling Laboratory, University of California, California CA 92521-0124, USA

摘要

摘要: 利用浸渍-后热解法制备了Bi₂O₃-Bi_7.90Mo_0.10O_12.15/Cu₇S₄生物碳催化剂(CSB-BOC),并采用X射线衍射仪(XRD)、场发射扫描电子显微镜(SEM)、X射线电子能谱仪(XPS)等对其晶格结构、形貌、表面元素及化学形态进行了表征和分析,随后探明其活化过一硫酸盐(PMS)去除新型污染物的催化性能及机理。以典型新型污染物盐酸四环素(TC)作为测试对象,研究了不同催化剂反应体系、PMS浓度、阴离子、腐植酸(HA)和pH对污染物去除的影响,考察了CSB-BOC循环使用的稳定性和异位去除河流缓集区水样中污染物的可行性,评估了TC降解产物的植物毒性。结果表明:CSB-BOC-5-1具有最佳催化性能,当其浓度为0.2 g/L,PMS浓度为0.2 g/L,TC浓度为20 mg/L,初始pH=6.8,温度为23℃,60 min内对TC去除率为95%左右,是生物碳(CSB)+PMS去除率的2.79倍;CSB-BOC-5-1循环使用4次后降解率仅降低了10百分点;自由基猝灭实验和电子自旋共振(ESR)结果表明¹O₂为降解TC主要活性物种;使用LC-MS鉴定了TC的降解产物并提出了2条可能的降解路径;植物毒性实验和实际水样实验表明CSB-BOC-5-1+PMS降解TC的处理溶液为无毒或低毒性,并且在用于异位去除河流缓集区水中的新型污染物时表现出良好效果。
- 生物碳 /
- 过一硫酸盐 /
- 新型污染物 /
- 浸渍-后热解 /
- 河流缓集区
Abstract: Biochar-supported Bi₂O₃-Bi_7.90Mo_0.10O_12.15/Cu₄S₇(CSB-BOC) composites were prepared by impregnation-post pyrolysis method and its lattice structure, morphology, surface elements, and chemical morphology were characterized and analyzed by XRD, SEM, XPS and other technologies. Subsequently, the performance and mechanism of CSB-BOC activated peroxymonosulfate(PMS) to remove emerging contaminants were explored. Tetracycline hydrochloride(TC), a typical emerging contaminant, was used as the target pollutant, and the effects of different catalyst reaction systems, PMS concentration, anions, humic acid(HA) and pH on pollutant's removal were studied; the stability of CSB-BOC recycling and the feasibility of removing pollutants in slow-gathering areas of river water were investigated; the phytotoxicity of TC degradation intermediates was evaluated. The results showed that CSB-BOC-5-1 had the best catalytic performance. When the concentration of CSB-BOC-5-1 was 0.2 g/L, the concentration of PMS was 0.2 g/L, the concentration of TC was 20 mg/L, pH=6.8, and the temperature was 23 ℃, the removal rate of TC reached 95% within 60 min at room temperature, 2.79 times that of coconut shell carbon(CSB)+PMS. The degradation efficiency after four degradation cycles only decreased by 10 percentage points. The results of the radical quenching experiment and electron spin resonance(ESR) showed that¹O₂ was the main active species for TC degradation. The degradation products of TC were identified by LC-MS, and two possible degradation pathways were proposed. The phytotoxicity test and the actual water tests showed that the treatment solution of CSB-BOC+PMS for TC degradation was non-toxic or low toxic, and it showed good effect when being used to remove emerging contaminants in the water samples of slow-gathering areas of a river.
- biochar /
- peroxymonosulfate /
- emerging contaminants /
- impregnation-post pyrolysis /
- slow-gathering areas

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