废弃聚氯乙烯塑料衍生的氮掺杂碳纳米片活化过一硫酸盐去除水中四环素  

Nitrogen doped carbon nanosheet derived from waste PVC plastic activatedperoxymonosulfate for tetracycline removal

作　　者：龚焱 汤琪 白纯 曹鹤龄 廉菲 王骏[2] 赵旭[3] GONG Yan;TANG Qi;BAI Chun;CAO Heling;LIAN Fei;WANG Jun;ZHAO Xu(Institute of Pollution Control and Environmental Health,School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China;School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010,China;State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)

机构地区：[1]河北工业大学能源与环境工程学院污染控制与环境健康研究所,天津300401 [2]西南科技大学材料与化学学院,绵阳621010 [3]中国科学院生态环境研究中心,环境水质学国家重点实验室,北京100085

出　　处：《环境工程学报》2024年第4期1161-1171,共11页Chinese Journal of Environmental Engineering

基　　金：工业生态与环境工程教育部重点实验室开放基金项目(KLIEEE-21-04);环境友好能源材料国家重点实验室开放基金项目(22kfhg06)。

摘　　要：本研究分别以废弃聚氯乙烯塑料和三聚氰胺作为碳源和氮源,采用高温热处理方法制备了氮掺杂薄层纳米碳片材料,并对其活化过一硫酸盐(PMS)去除水中抗生素四环素(TC)的性能进行研究。考察了PMS浓度、催化剂投加量、pH及不同离子对TC去除的影响。多种物化表征结果表明,所制备材料为薄层纳米片结构且主要由碳、氮和氧元素组成。降解实验结果表明,该催化剂具有较优的活化过一硫酸盐(PMS)去除TC的性能。在投加PMS浓度为1 mmol·L^(-1)、催化剂投加量为0.1 g·L^(-1)条件下,催化剂去除TC活性最佳,反应30 min后,TC的去除率达到98%。自由基捕获实验和电子自旋共振测试结果表明,该催化剂活化PMS降解TC过程中,起主导作用的为单线态氧、超氧自由基。重复性实验结果表明该催化剂具备较好的稳定性。本研究可为新型高效活化PMS碳基催化体系的开发及其在环境污染控制领域的应用提供参考。In this work,nitrogen doped carbon nanosheet catalyst was synthesized via a thermal treatment method by employing waste polyvinyl chloride(PVC)plastic as carbon source and melamine as nitrogen source.The performance of tetracycline(TC)removal from water by the catalyst activated peroxymonosulfate(PMS)was evaluated.The effects of the operational parameters including PMS concentration,catalyst dosage,pH and different inorganic ions on TC degradation were studied.The results of various characterizations revealed that the prepared catalyst had a thin nanosheet structure and consisted of carbon,nitrogen and oxygen elements.Moreover,the catalyst displayed an excellent PMS activation ability for TC degradation.The optimum TC removal happened at the catalyst dosage of 0.1 g·L^(-1) and PMS content of 1 mmol·L^(-1),98%of TC could be removed after 30 min reaction.As confirmed by results of the radical trapping experiments and EPR tests,the formed singlet oxygen and superoxide radicals played a vital role during TC degradation by catalyst/PMS.The result of cycling tests revealed that the catalyst had a relatively robust stability.This work paves the way for the rational design of a novel carbon-based catalytic system with high-efficiency PMS activation and application in the field of environmental pollution control.

关 键 词：过一硫酸盐 氮改性碳 聚氯乙烯 四环素 

分 类 号：X703[环境科学与工程—环境工程]