博彩网站 暨广东省环境污染控制与修复技术重点实验室
报告题目：Sorting out the complexity of PFAS behaviors for environmental protection
报 告  人：刘锦霞 博士
                香港理工大学
时      间：2025年04月18日（周五）上午10:00-11:30
地      点：东校园环境大楼A206
主      持：李蕊 副教授
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报告人简介:
      Dr. Jinxia Liu is an Associate Professor in the Department of Civil and Environmental Engineering at Hong Kong Polytechnic University. Previously, she was an Associate Professor and Chwang-Seto Faculty Scholar in the Department of Civil Engineering at McGill University in Canada. She received a B. Eng. degree in environmental engineering at Tianjin University (China) and a PhD in Soil Chemistry from Purdue University (USA).  After earning her PhD, Dr. Liu worked as a research analyst at DuPont's Global R&D Center and participated in the US Environmental Protection Agency's (EPA) 2010/2015 PFOA Stewardship Program.
      Dr. Liu focuses on soil and water quality in relation to human and ecosystem health, with significant research on the environmental behavior of PFAS through lab experiments and field monitoring. Her work integrates chemistry, microbiology, and engineering to improve water and soil quality and develop innovative treatment technologies. She has secured 41 research grants/contracts, leading 25 and totaling CAD 7.1 million in her share, with significant funding from the US SERDP program. Dr. Liu collaborates with governmental agencies, private companies, and researchers across six countries and disciplines, including chemical engineering, biology, and toxicology. She serves on the Editorial Advisory Board of Environmental Science & Technology and has reviewed grants for various funding agencies in Canada, USA and Europe. Dr. Liu has contributed as a scientific expert in major PFAS-related lawsuits involving environmental pollution. Her accolades include the NSERC Discovery Accelerator Award, Chwang-Seto Faculty Scholar, and Review in Excellence from Environmental Science & Technology and its Letters journal. Her students have won prestigious honors like the Canada Vanier Scholarship, Swiss Postdoc Fellowship, and AEESP Best Masters Thesis Award. 
      刘锦霞博士是香港理工大学土木与环境工程系的副教授。此前，她曾任加拿大麦吉尔大学土木工程系的副教授，并获得Chwang-Seto学者称号。她在中国天津大学获得环境工程学士学位，并在美国普渡大学获得土壤化学博士学位。获得博士学位后，刘博士曾在杜邦全球研发中心担任研究分析师，并参与了美国环境保护署（EPA）2010/2015年PFOA责任管理计划。
      刘博士的研究重点是土壤和水质对人类与生态系统健康的影响，尤其是在PFAS（全氟和多氟烷基物质）环境行为方面的实验室研究与现场监测工作。她的研究融合了化学、微生物学与工程学，以改善水体和土壤质量，并开发创新的处理技术。她共获得41项科研资助/合同项目，其中主持25项，其所占经费总额达710万加元，其中包括来自美国战略环境研究与开发计划（SERDP）的重要资助。
      刘博士与政府机构、私营企业及来自六个国家的研究人员开展跨学科合作，涉及化学工程、生物学、毒理学等多个领域。她现为《Environmental Science & Technology》期刊的编辑顾问委员会成员，并为加拿大、美国及欧洲的多个资助机构审阅科研项目申请。她还曾以科学专家身份参与多起与PFAS环境污染相关的重大诉讼案件。
      刘博士荣获包括加拿大自然科学与工程研究委员会（NSERC）“Discovery Accelerator Award”、Chwang-Seto学者称号，以及《Environmental Science & Technology》及其子刊授予的“优秀审稿人奖”等多个奖项。她指导的学生亦屡获殊荣，包括加拿大范尼耶研究生奖学金、瑞士博士后奖学金，以及美国环境工程与科学学会（AEESP）最佳硕士论文奖。
报告内容简介：
      Per- and polyfluoroalkyl substances (PFAS), recognized as persistent organic pollutants, have generated considerable public and scientific concerns due to their adverse environmental and health impacts. This concern has prompted regulatory actions, risk mitigation, and remediation efforts. However, the complex chemical compositions and distinctive environmental behaviors of PFASs are not yet fully comprehended or adequately addressed. Regulators have primarily focused on perfluoroalkyl substances such as PFOS and PFOA, while most PFASs are produced as low-molecular-weight polyfluoroalkyl substances and high-molecular-weight polymers. Dr. Jinxia Liu's research team employs an interdisciplinary approach and cutting-edge science to unravel the complexities of PFAS pollution in soil and water. The insights gained over the past decade have significantly contributed to formulating appropriate legislation by regulators and developing effective treatment technologies.
      This seminar delves into findings from three key research areas. Firstly, it explores the challenges and advancements in monitoring PFAS in the environment. The discussion encompasses ongoing efforts to develop analytical tools capable of capturing PFAS in various environmental compartments. It also addresses the relative importance or abundance of polyfluoroalkyl substances in drinking water, soil, and biosolids based on extensive monitoring studies. Secondly, numerous treatment and remediation technologies have emerged to address PFAS-contaminated water and soil. The seminar discusses the development of clay-based sorbents and advanced chemical oxidation processes, elucidating their working mechanisms within the context of unique organofluorine chemistry. Thirdly, the seminar examines how polyfluoroalkyl substances transform microbially in the environment. Studies from Dr Liu’s team indicate that PFAS originating from film-forming foams (AFFFs) exhibit varying environmental stability and biotransformation potentials influenced by chemical structures. Novel transformation rules, bioinformatics and machine learning are deemed necessary to predict the transformation pathways of various PFAS structures.
      全氟和多氟烷基物质（PFAS）被公认为持久性有机污染物，因其对环境与人类健康的负面影响，引发了公众与科研界的广泛关注。这一关注推动了相关法规的出台、风险管控措施的制定以及污染修复工作的开展。然而，PFAS复杂的化学组成及其独特的环境行为至今仍未被充分理解和有效应对。监管机构主要关注的是如全氟辛烷磺酸（PFOS）和全氟辛酸（PFOA）等全氟化合物，而实际上，绝大多数PFAS属于低分子量的多氟化合物或高分子量的聚合物。
      刘锦霞博士的研究团队采用跨学科方法与前沿科学手段，致力于揭示土壤和水体中PFAS污染的复杂机制。在过去十年中，他们的研究成果为监管机构制定科学合理的法规提供了有力支持，并推动了高效处理技术的发展，对环境保护产生了深远影响。
      本次研讨会将深入探讨三个关键研究领域的最新成果。首先，研讨会将探讨PFAS环境监测中的挑战与进展。内容涵盖当前在分析技术方面的努力，旨在实现对各类环境介质中PFAS的精准捕捉与检测。基于大规模监测研究，研讨会还将讨论多氟化合物在饮用水、土壤和生物固体中相对的重要性和丰度。其次，面对PFAS污染的水体和土壤，已出现多种处理与修复技术。研讨会将重点介绍黏土基吸附剂和先进化学氧化技术的研发进展，并在有机氟化学的独特语境下解析其作用机制。第三，研讨会将探讨多氟化合物在环境中的微生物转化过程。刘博士团队的研究表明，源自抗火泡沫（AFFF）的PFAS因其化学结构差异，在环境中的稳定性与生物转化潜力表现出显著差异。为预测各种PFAS结构的转化路径，亟需建立新的转化规律，并结合生物信息学与机器学习等前沿工具加以研究。这场研讨将为理解和应对PFAS污染提供更深层次的科学洞见与应对策略。