2025年學術報告“Sorting out the complexity of PFAS behaviors for environmental protection”
太阳集团1088vip暨廣東省環境污染控制與修複技術重點實驗室
報告題目：Sorting out the complexity of PFAS behaviors for environmental protection
報 告 人：劉錦霞 博士
香港理工大學
時 間：2025年04月18日（周五）上午10:00-11:30
地 點：東校園環境大樓A206
主 持：李蕊 副教授
歡迎廣大師生參加！
報告人簡介:
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.
劉錦霞博士是香港理工大學土木與環境工程系的副教授。此前，她曾任加拿大麥吉爾大學土木工程系的副教授，并獲得Chwang-Seto學者稱号。她在中國天津大學獲得環境工程學士學位，并在美國普渡大學獲得土壤化學博士學位。獲得博士學位後，劉博士曾在杜邦全球研發中心擔任研究分析師，并參與了美國環境保護署（EPA）2010/2015年PFOA責任管理計劃。
劉博士的研究重點是土壤和水質對人類與生态系統健康的影響，尤其是在PFAS（全氟和多氟烷基物質）環境行為方面的實驗室研究與現場監測工作。她的研究融合了化學、微生物學與工程學，以改善水體和土壤質量，并開發創新的處理技術。她共獲得41項科研資助/合同項目，其中主持25項，其所占經費總額達710萬加元，其中包括來自美國戰略環境研究與開發計劃（SERDP）的重要資助。
劉博士與政府機構、私營企業及來自六個國家的研究人員開展跨學科合作，涉及化學工程、生物學、毒理學等多個領域。她現為《Environmental Science & Technology》期刊的編輯顧問委員會成員，并為加拿大、美國及歐洲的多個資助機構審閱科研項目申請。她還曾以科學專家身份參與多起與PFAS環境污染相關的重大訴訟案件。
劉博士榮獲包括加拿大自然科學與工程研究委員會（NSERC）“Discovery Accelerator Award”、Chwang-Seto學者稱号，以及《Environmental Science & Technology》及其子刊授予的“優秀審稿人獎”等多個獎項。她指導的學生亦屢獲殊榮，包括加拿大範尼耶研究生獎學金、瑞士博士後獎學金，以及美國環境工程與科學學會（AEESP）最佳碩士論文獎。
報告内容簡介：
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.
全氟和多氟烷基物質（PFAS）被公認為持久性有機污染物，因其對環境與人類健康的負面影響，引發了公衆與科研界的廣泛關注。這一關注推動了相關法規的出台、風險管控措施的制定以及污染修複工作的開展。然而，PFAS複雜的化學組成及其獨特的環境行為至今仍未被充分理解和有效應對。監管機構主要關注的是如全氟辛烷磺酸（PFOS）和全氟辛酸（PFOA）等全氟化合物，而實際上，絕大多數PFAS屬于低分子量的多氟化合物或高分子量的聚合物。
劉錦霞博士的研究團隊采用跨學科方法與前沿科學手段，緻力于揭示土壤和水體中PFAS污染的複雜機制。在過去十年中，他們的研究成果為監管機構制定科學合理的法規提供了有力支持，并推動了高效處理技術的發展，對環境保護産生了深遠影響。
本次研讨會将深入探讨三個關鍵研究領域的最新成果。首先，研讨會将探讨PFAS環境監測中的挑戰與進展。内容涵蓋當前在分析技術方面的努力，旨在實現對各類環境介質中PFAS的精準捕捉與檢測。基于大規模監測研究，研讨會還将讨論多氟化合物在飲用水、土壤和生物固體中相對的重要性和豐度。其次，面對PFAS污染的水體和土壤，已出現多種處理與修複技術。研讨會将重點介紹黏土基吸附劑和先進化學氧化技術的研發進展，并在有機氟化學的獨特語境下解析其作用機制。第三，研讨會将探讨多氟化合物在環境中的微生物轉化過程。劉博士團隊的研究表明，源自抗火泡沫（AFFF）的PFAS因其化學結構差異，在環境中的穩定性與生物轉化潛力表現出顯著差異。為預測各種PFAS結構的轉化路徑，亟需建立新的轉化規律，并結合生物信息學與機器學習等前沿工具加以研究。這場研讨将為理解和應對PFAS污染提供更深層次的科學洞見與應對策略。