在UV/工艺中,在聚烯微塑料上的氧化降解和同时存在的脱甲乙烯 (BDE-209) 的可能相互作用
Nannan Wu1, Wenrui Xiang2, Feng Zhu3
1State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China; State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products & Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, P. R. China.
Water research
|September 9, 2023
概括
在紫外线/处理中,老化聚烯微塑料抑制了脱甲乙烯 (BDE-209) 降解. 相互作用形成有毒的副产品,影响水处理过程和生态风险.
科学领域:
- 环境化学环境化学
- 水处理技术水处理技术
- 聚合物科学 聚合物科学
背景情况:
- 微塑料,如聚钢 (PS),是普遍存在的环境污染物.
- 甲基乙烯 (BDE-209) 是一种持久性有机污染物,通常被发现吸附在微塑料上.
- 紫外线/工艺用于饮用水和废水处理厂 (DWTP和WWTP).
研究的目的:
- 研究BDE-209在UV/处理下与微塑料共存的降解.
- 探索BDE-209和老化聚烯 (PS) 微塑料之间的相互作用机制.
- 评估与加工产品相关的生态风险.
主要方法:
- 在PS微塑料的存在下对BDE-209降解动力学的实验研究.
- 使用先进的分析技术分析降解途径和转化产品.
- 评估水化学 (pH,离子) 和PS特性对降解效率的影响.
- 降解和相互作用产品的毒性评估.
主要成果:
- 陈旧的PS微塑料显著抑制了BDE-209的降解.
- 降解效率受到BDE-209度和水化学 (NO3-, SO42-, HCO3-, HA) 的影响.
- 直接光解,HO•,和Cl为BDE-209的降解做出了贡献,其中直接光解占主导地位.
- 聚氨酸微塑料影响了BDE-209转化产物的类型和丰度,并形成了相互作用产物.
- 转化产品,特别是那些具有碳化合物键的产品,呈现出增加的毒性.
结论:
- 陈旧的PS微塑料的存在使BDE-209在UV/工艺中的去除复杂化.
- 了解这些相互作用对于评估水处理的有效性和安全性至关重要.
- 有毒副产品的形成凸显了对微塑料污染和相关污染物的谨慎管理的需要.
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