多波长UV-LED/氯技术增效去除微塑料载带药物与个人护理品及机理研究

微塑料和药物与个人护理品（PPCPs）对水体的污染日益严峻，是亟待解决的环境问题。然而，微塑料对PPCPs的吸附行为及其影响机制未得到系统解析。去除微塑料载带PPCPs，抑制毒性中间体生成，是减小环境风险的关键。本项目创新性提出多波长UV-LED/氯技术，并将其用于塑料载带PPCPs的增效去除。借助现代表征技术，探寻微塑料微观结构特性与吸附PPCPs行为的关联性；基于氯光解原理，优化多波长UV-LED组合，实现活性物种高效产生；探明去除微塑料载带PPCPs的优势活性物种及降解贡献；采用色谱质谱联用追踪降解产物，评估消毒副产物（DBPs）生成势能；以量化计算为指导，调控多波长UV-LED/氯体系活性物种，以抑制毒性中间体和DBPs生成。本项目旨在揭示微塑料和PPCPs相互作用机制，明晰多波长UV-LED/氯技术增效去除微塑料载带PPCPs的机理及影响，为微塑料基复合污染治理提供新的解决思路。

The pollution on microplastics and pharmaceutical and personal care products (PPCPs) in water is increasingly serious, which has become one of the urgent environmental issues. However, the adsorption behavior and mechanism of microplastics towards PPCPs have never been investigated systematically. Removal of attached PPCPs from microplastics, and inhibition formation of toxic intermediates, is the key for reduce the environment risk. In this project, multi-wavelength UV-LED/chlorine process will be proposed and used as the strategy of synergistic elimination of attached PPCPs from microplastics. In aid of advantages of modern characterization technology, the relevance between microstructure characteristics of microplastics and its adsorption behavior for PPCPs will be explored. According the principle of chlorine photolysis, combination of multi-wavelength UV-LED will be optimized to achieve the efficient generation of reactive species. The dominant reactive species and its contribution for decomposition of attached PPCPs from microplastics will be ascertained. Chromatography combined with mass spectrometry are utilized to identify the intermediate products, further evaluate the disinfection by-products (DBPs) formation potential. Guided by quantum chemical calculation, the formation of toxic intermediates and DBPs will be inhibited by changing the type of reactive species generated from multi-wavelength UV-LED/chlorine. The aim of this project is to disclose the interaction mechanism between microplastics and PPCPs, clarify the mechanism and influence on synergistic removal of attached PPCPs from microplastic by multi-wavelength UV-LED/chlorine process, as well as a novel pathway for the abatement of microplastics-based combined pollution.