Fe_(78)Si_(9)B_(13)非晶合金对磺胺嘧啶的降解性能  

Degradation Properties of Fe_(78)Si_(9)B_(13)Amorphous Alloys to Sulfadiazine

作　　者：李坤 李嘉兴 焦蒙 曾浩宇 刘世杰 杨娟[1] LI Kun;LI Jia-xing;JIAO Meng;ZENG Hao-yu;LIU Shi-jie;YANG Juan(School of Ecology and Environment,Southwest Forestry University,Kunming 650244,China)

机构地区：[1]西南林业大学生态与环境学院,昆明650244

出　　处：《科学技术与工程》2025年第10期4377-4385,共9页Science Technology and Engineering

基　　金：国家自然科学基金(22166033);云南省科技厅基金(202101AT070046,202101BD070001-112,202203AC100001);云南省兴滇英才支持计划(990124083)。

摘　　要：抗生素为水环境中新型污染物,对水生生态环境以及人类的健康有潜在的威胁。针对磺胺类抗生素难降解氧化且并不能完全被污水处理厂高效去除,构建Fe_(78)Si_(9)B_(13)/H_(2)O_(2)体系高效环保降解磺胺类抗生素污染。通过一系列不同的实验参数实验遴选出,Fe_(78)Si_(9)B_(13)/H_(2)O_(2)体系作为高效降解磺胺嘧啶(sulfadiazine,SDZ)的最佳工艺。实验结果表明,在pH=2,H_(2)O_(2)=50μmol/L,温度为25℃时,能使250μg/LSDZ在4 min内100%降解,其表观速率常数(K_(obs))可达0.99 min~(-1),其体系中去除SDZ的活化能为25.42 kJ/mol。淬灭剂实验证明Fe_(78)Si_(9)B_(13)/H_(2)O_(2)体系降解SDZ的关键活性物质是羟基自由基(·OH)。通过高分辨鉴定中间体以及对中间体进行毒性评估,结果表明所有中间体相比母本都大幅度减少或无害。此外,通过实际水体降解实验,验证了该氧化降解体系实际应用潜力。Antibiotics are new pollutants in water environment,which have potential threat to aquatic ecological environment and human health.Considering that sulfanilamide antibiotics are difficult to degrade and oxidize and cannot be effectively removed by sewage treatment plants,Fe_(78)Si_(9)B_(13)/H_(2)O_(2)system was constructed to efficiently and environmentally degrade sulfanilamide antibiotic pollution.Fe_(78)Si_(9)B_(13)/H_(2)O_(2)system was selected as the best process for efficient degradation of SDZ(sulfadiazine)through a series of experiments with different experimental parameters.The experimental results show that 250μg/L SDZ can be degraded 100%within 4 min at pH=2,H_(2)O_(2)=50μmol/L and temperature 25℃,and its apparent rate constant(K obs)can reach 0.99 min-1.The activation energy of SDZ removal in the system is 25.42 kJ/mol.The quenching agent experiments show that the key active substance of Fe_(78)Si_(9)B_(13)/H_(2)O_(2)system degrades SDZ is hydroxyl radical(·OH).Through high resolution identification of intermediates and toxicity assessment of the intermediates,the results show that all intermediates are substantially reduced or harmless compared to the mother.In addition,the practical application potential of the oxidation degradation system is verified through the actual water degradation experiment.

关 键 词：铁基非晶合金 磺胺嘧啶 高级氧化法 水处理 

分 类 号：X703.1[环境科学与工程—环境工程]