磺胺甲恶唑和甲氧苄啶对生物脱氮过程的影响规律  

Effect of sulfamethoxazole and trimethoprim on biological nitrogen removal

作　　者：杨腾飞 张小寒 黄铄淇 许艺凡 莫耀钧 招思丽 任源 YANG Tengfei1 ZHANG Xiaohan1 HUANG Shuoqi1 XU Yifan1 MO Yaojun1 ZHAO Sili1 REN Yuan1,2,3(1. School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; 2. The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China; 3. The Key Laboratory of Environmental Protection and Eco-Remediation of Guangdong Regular Higher Education Institutions, Guangzhou, 510006, Chin)

机构地区：[1]华南理工大学环境与能源学院,广州510006 [2]工业聚集区污染控制与生态修复教育部重点实验室,广州510006 [3]污染控制与生态修复广东省普通高等学校重点实验室,广州510006

出　　处：《环境化学》2018年第3期471-479,共9页Environmental Chemistry

基　　金：广州市科技计划项目(201707010158)资助~~

摘　　要：近年来,滥用抗生素对环境和人类健康的潜在危害引起了广泛的关注.生物脱氮是废水处理系统中的重要组成部分,抗生素的大量存在影响了水中含氮污染物的高效去除.本文以磺胺甲恶唑(SMX)和甲氧苄啶(TMP)为例,探究了这两种抗生素单独作用和混合存在时对生物脱氮的影响,以及脱氮过程中抗生素自身的降解情况.结果显示,在硝化过程中,暴露48 h的条件下,TMP和SMX对硝化过程的抑制作用随其浓度的增大而增强,并且TMP和SMX混合作用时对硝化过程的抑制比单独作用时明显增强,SMX和TMP分别单独作用和混合存在时,对污泥的氨氧化最大抑制率分别为42.1%、55.2%和64.0%.在反硝化过程中,TMP通过影响硝态氮还原为亚硝态氮的过程,对反硝化产生明显的抑制作用.此外,在脱氮过程中,SMX和TMP自身会被微生物降解,在硝化过程中SMX比TMP更容易被降解,而在反硝化过程中TMP比SMX更容易被降解.In recent years,the potential harm of antibiotics abuse to environment and human health has triggered wide concern. Biological nitrogen removal is an important process in wastewater treatment system,and the large amount of antibiotics in the influent of sewage treatment plant may affect the efficient removal of total nitrogen in wastewater. In this paper,the effects of antibiotics on biological nitrogen removal and the degradation of antibiotics were investigated with sulfamethoxazole（ SMX） and trimethoprim（ TMP） as representative antibiotics. The results showed that the inhibition of TMP and SMX on nitrification was enhanced with their concentration under the condition of 48 h exposure in the nitrification process. Moreover,the inhibition on nitrification by the mixture of SMX and TMP was significantly enhanced compared to that of the individual one,and the maximum inhibition rates of ammonia oxidation were 42.1%（ TMP）,55. 2%（ SMX）,and 64%（ TMP and SMX） respectively. In the denitrification process, TMP had a significant inhibitory effect viainhibiting the process of nitrate reduction to nitrite. In addition,SMX and TMP themselves were degraded by microorganisms in the process of nitrogen removal. SMX was more susceptible to degradation in nitrification than TMP. In contrast,TMP was more susceptible to degradation than SMX in the denitrification process.

关 键 词：硝化 反硝化 磺胺甲恶唑 甲氧苄啶 降解 

分 类 号：X52[环境科学与工程—环境工程]