CAREER: Beyond Conventional Drinking Water Management: Control of Redox-driven in situ Release of Accumulated Inorganic Contaminants from Water Distribution Infrastructure

PI姓名：刘建议书编号：1653931该项目的主要目标是调查从供水基础设施中释放有毒金属和类金属的化学过程。对腐蚀产物中累积污染物与残留消毒剂和源沃茨的化学反应性的认识在很大程度上是未知的。PI将专注于有毒金属在不同水化学中的释放机制。目标之一是创建一个新的饮用水管理模式，并为水处理应用的安全性提供重要见解。要实现这一目标，就需要将腐蚀、化学和动力学建模的基本原理与电化学中先进工具的开发相结合。从这项研究中获得的见解将用于最大限度地减少有毒饮用水污染物的释放，帮助保护公众健康，并确保水基础设施的可持续性。 该项目的主要目标是阐明水分配基础设施中的基本氧化还原化学。 中心研究假设是，从饮用水分配基础设施中原位释放累积的无机污染物与这些污染物的氧化还原行为密切相关。可以优化溶液化学条件以控制它们的迁移率。在本项目中，PI将研究1）由分配系统中不同残留消毒剂介导的铬、砷、硒和钒的氧化还原驱动释放; 2）量化溶液化学条件和改变水源对无机污染物释放速率的催化和抑制作用;以及3）检查控制水分配系统中无机污染物的最终产率的短寿命金属中间体的性质。研究主题将被纳入系统评估的教育举措，将1）增加内陆南加州代表性不足的学生四年制大学入学率; 2）培养环境工程方面的创造性和全球参与的劳动力;和3）告知水务行业和公众有关配水系统的问题。PI将把研究与教育推广机会结合起来，为两名博士生、数百名本科生、社区大学生、K-12教师、水务管理人员和内陆南加州的居民提供机会。在加州大学，滨江（UCR）和三所社区学院（所有认可的西班牙裔服务机构）注册的学生将参加研究。PI将与当地的初中和高中在UC数学工程科学成就计划合作，让学生参与水质问题。与瑞士和中国的大学合作将培养学生成为具有全球竞争力的工程师。该研究将通过加州大学电视台，K-12 STEM教师培训课程，UCR课程，网站材料，工业研讨会和出版物向公众传播。

PI Name: LiuProposal Number: 1653931The main objective of this project is to investigate the chemical processes governing the release of toxic metals and metalloids from the water distribution infrastructure. Awareness of chemical reactivities of accumulated contaminants in corrosion products with residual disinfectants and source waters is largely unknown. The PI will focus on the mechanisms of toxic metal release in diverse water chemistries. One goal is to create a new paradigm in managing drinking water and provide essential insights for the safety of water treatment applications. Reaching this goal will require the integration of fundamental principles of corrosion, chemistry, and kinetics modeling with the development of advanced tools in electrochemistry. Insights gained from this study will be used to minimize release of toxic drinking water contaminants, help protect public health, and ensure sustainability of the water infrastructure. The primary objective of this project is to elucidate the fundamental redox chemistry in the water distribution infrastructure. The central research hypothesis is that in situ release of accumulated inorganic contaminants from the drinking water distribution infrastructure is closely associated with the redox behavior of these contaminants. Solution chemical conditions can be optimized to control their mobility. In this project the PI will investigate 1) the redox-driven release of chromium, arsenic, selenium, and vanadium mediated by different residual disinfectants in the distribution systems; 2) quantify catalytic and inhibitive effects of solution chemical conditions and changing water sources on the rates of inorganic contaminant release; and 3) examine the nature of short-lived metal intermediates that control the ultimate yields of inorganic contaminants in water distribution systems. Research themes will be integrated into systematically assessed educational initiatives that will 1) increase four-year university enrollment for underrepresented students in Inland Southern California; 2) cultivate a creative and globally engaged workforce in environmental engineering; and 3) inform the water industry and the public about water distribution system issues. The PI will integrate the research with educational outreach opportunities for two PhD students, hundreds of undergraduates, community college students, K-12 teachers, water utility managers, and the residents of Inland Southern California. Students enrolled at the University of California, Riverside (UCR) and three community colleges (all accredited Hispanic-Serving Institutions) will participate in research. The PI will collaborate with local middle and high schools in the UC Mathematics Engineering Science Achievement program to engage students in water quality issues. Collaborations with universities in Switzerland and China will prepare students as globally competent engineers. The research will be disseminated to the public through University of California Television, K-12 STEM teacher training curricula, UCR courses, website materials, industrial workshops, and publications.