影响中国城市固体废物焚烧厂液中抗生素发生的分布,清除和潜在因素
Xuan Rui1, Huabo Gong2, Jinwen Hu2
1School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China; Hangzhou Environmental Protection Scientific Research and Design Co., Ltd., Hangzhou 310014, PR China.
抗生素和抗生素耐药性基因 (ARG) 在城市固体废物 (MSW) 焚烧浸出物中普遍存在,抗生素水平的区域差异很大. 处理过程有效地去除了抗生素,主要是通过生物降解.
科学领域:
- 环境科学 环境科学
- 环境化学环境化学
- 微生物学 微生物学
背景情况:
- 城市固体废物 (MSW) 焚烧中的液含有抗生素和抗生素耐药基因 (ARG),但比垃圾填埋场的液研究较少.
- 了解这些污染物的发生和命运对于环境保护至关重要.
研究的目的:
- 调查MSW焚烧液中硫胺,类和类物质在中国各地的分布.
- 确定影响抗生素和ARG污染水平的因素.
- 评估多阶段处理过程的去除效率,并确定主要的去除途径.
主要方法:
- 来自14个MSW焚烧厂的液中的8种硫胺,4种醇和4种宏酸的分析.
- 总ARG和移动遗传元素的量化.
- 与物理化学参数和微生物群体的相关性分析.
- 在"无氧-无氧/有氧-无氧/有氧-超-纳米"处理过程中对抗生素去除的评估.
主要成果:
- 总抗生素度从4406.1到14,930.6 ng/L不等,区域差异与经济状况,气候和废物政策有关.
- 总ARG的丰度从1.3×10^7到4.0×10^8拷贝/毫升不等;像intl1这样的移动遗传元素促进了ARG的传播.
- 抗生素和ARG水平与TOC,pH,氨,重金属和微生物群落有显著的相关性.
- 处理过程实现了76.1%-97.0%的抗生素去除,生物降解 (62.0%-90.9%) 是主要的机制,而不是污泥吸附 (1.0%-11.7%).
结论:
- 垃圾焚烧污水是抗生素和ARG的重要来源,呈现区域差异.
- 物理化学性质和微生物群落影响污染物水平.
- 通过先进的治疗,可以有效地去除抗生素,而生物降解起着关键作用.
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