再生水地下储存过程中微塑料环境行为及调控机制研究

The underground storage of reclaimed water is deemed as a new topic in the field of wastewater resource utilization, environmental risk created by pollutants in reclaimed water has been a hot issue in environmental research. Being a new pollutant with small size and low density, microplastics(MPs) becomes a good carrier of other pollutants. Since high abundance of microplastics is continuously detected in reclaimed water, it's vital to clarify the joint toxicity of microplastics and its complex in complicated environment medium, not mentioning the risk to reclaimed water storage environment is still unknown yet. To ensure the safety of recycled water quality, this projectbased on the characteristics of reclaimed water underground storage, will propose a rapid collection, efficient separation and accurate detection method, which aims to scientifically evaluate the influence of microplastics recharge flux on reclaimed water quality. Mechanism of the joint toxicity of microplastics on the formation of biofilm is deemed as a critical scientific issue to identify the molecular mechanism of microplastics on characteristic microorganisms. Meanwhile, by simulating in-situ reclaimed water underground storage environment, this project will propose a biofilm pollution control scheme in accordance with the stimulation of microplastics joint toxicity. Findings of the scheme is supposed to scientifically evaluate environmental risks of microplastics in the underground storage process of reclaimed water.

再生水地下储存被视为污水资源化领域的新命题，再生水中污染物引发的环境风险一直是环境领域研究的热点问题。新型污染物微塑料具有粒径小、密度低等特点，极易成为其它污染物的优良载体。随着微塑料在再生水中不断检出且丰度较高，在复杂环境介质下微塑料及其复合体的联合毒性尚不明晰，对于再生水地下储存环境风险的研究尚属空白。为保障再生水回用水质安全，本项目拟通过建立基于再生水地下储存特征的快速采集、高效分离和精准检测方法，科学评估微塑料回灌通量对再生水地下储存水质安全的影响；以再生水中微塑料诱发的联合毒性对生物膜形成的影响机制为关键科学问题，探索微塑料对代表性微生物的分子作用机制；结合模拟原位再生水地下储存条件，建立微塑料联合毒性刺激条件下的生物膜污染控制方案，为评价再生水地下储存过程中微塑料引起的环境风险提供科学依据。

再生水地下储存被视为污水资源化领域的新命题，再生水中污染物引发的环境风险一直是环境领域研究的热点。近年来微塑料被联合国环境规划署在《新型污染物议题》的中正式列为最为关注的污染物。在复杂环境介质下微塑料及其复合体的联合毒性尚不明晰，为保障再生水回用水质安全，研究高效的微塑料提取、分析、检测方法，明确微塑料与有毒有害物质的相互作用机制。针对再生水地下储存过程中微塑料可能产生的环境行为，开展了基于杂多酸催化体系的微塑料污染控制研究，阐释其降解的构效机制。针对微塑料的污染特性，开发了功能化多酸催化材料体系，实现资源物质与污染物高效转化与降解的目标，为绿色功能化材料在实际工程中的应用提供新思路。巧妙构建功能化多金属氧酸盐催化材料，通过调控酸中心和氧化还原中心及微观结构，优化选择性催化性能，并提出生态环境循环发展的技术框架。