供水管网生长环内氯代烃迁移转化及类芬顿降解机理研究

Water distribution network (WDN) is the important urban infrastructure. After running for years, growth ring formed inside pipes. In recent years, because of widely applications in industrial production and unreasonable disposal, chlorinated aliphatic hydrocarbons (CAHs) migrated to the aquifer from the surface. After water purification process, although CAHs could satisfy drinking water standards, water with trace CAHs could also cause threat to human health and environment. Water with CAHs directly contacts with growth ring during transportation in pipelines, therefore, it is important to investigate the transport characteristics, transformation rules and degradation methods of CAHs. This research includes: investigate the transport characteristics and transformation rules of TCE and PCE in growth ring of WDN; build Fenton-like system based on growth ring in pipelines, and discuss the removal effect and influences of TCE and PCE; reveal the degradation mechanism of Fenton-like system. The results of this research could solve the problem of potential safety hazard caused by TCE and PCE in WDN, providing basis for safe water delivery in WDN.

供水管网是城市的重要基础设施，供水管道经过长年运行，沿管道内壁会逐渐形成生长环。近年来，由于氯代烃在工业生产中的广泛应用和不合理处置，致使其进入土壤及水环境中，导致供水水源氯代烃超标。受污染水体经净水工艺处理后可满足国家饮用水标准，然而，含有微量或痕量氯代烃的水体对人类健康仍存在风险，长期饮用或接触会导致癌症。水体在供水管网输送过程中与生长环长期接触，研究氯代烃在供水管网生长环内的迁移转化机制及降解方法至关重要。此项研究包括：研究TCE、PCE在供水管网生长环内的迁移转化规律；构建类Fenton体系，研究该体系内不同含铁矿物催化降解TCE、PCE的效果及影响因素；揭示所构建的类Fenton体系对TCE、PCE的催化降解机理。本项目的研究成果可以解决TCE、PCE在供水管网内的安全隐患问题，为供水管网安全输水提供依据。

供水管网是城市的重要基础设施，供水管道经过长年运行，沿管道内壁会逐渐形成生长环。近年来，由于氯代烃在工业生产中的广泛应用和不合理处置，致使其进入土壤及水环境中，导致供水水源氯代烃超标。受污染水体经净水工艺处理后可满足国家饮用水标准，然而，含有微量或痕量氯代烃的水体对人类健康仍存在风险，长期饮用或接触会导致癌症。此项主要研究TCE、PCE在供水管网生长环内的迁移转化规律、分析影响因素及探讨机理。构建基于供水管网生长环的类Fenton体系，研究其催化降解TCE、PCE的效果及影响因素、降解机理。本项目的研究成果可以解决TCE、PCE在供水管网内的安全隐患问题，为供水管网安全输水提供依据。