典型全氟化合物在土水界面的环境行为及微生物响应

Due to their unique amphiphylic properties, perfluorinated compounds (PFCs) have been used in a variety of applications such as surfactants and surface protectors. Widespread application as well as environmental persistence and bioaccumulation of terminal degradation products of PFCs have resulted in global occurrence in air, water, sediment, as well as organisms. The study medium of PFCs was mainly focused on waters and sediments, but few reports on soil environment. In addition, up to now, most of toxicological studies on PFCs in soil are concentrated on animal experiments, whereas much less studies are focused on the potential toxicity of PFCs to soil microorganisms. To obtain more information about the fate and behavior of PFCs in soil, we aimed to (i) study the sorption behavior and mechanisms of PFCs onto different types of soils in soil-water interface and determine the potential contributions of soil physicochemical properties; (ii) systematically investigate the ecological effect of PFCs on soil microorganisms and microbial responses from the standpoint of energy metabolism at the molecular level by microcalorimetry and molecular biotechnology. This will lead to the development of a new interdisciplinary approach of Environmental Geochemistry, Biothermochemistry and Microbiology, and may provide a scientific basis and technical support for removing and transforming of PFCs research and ecological risk assessment of PFCs to soil microorganisms.

全氟化合物（PFCs）在全球范围内的各环境介质中已被检出，其环境持久性和对生物体的危害性引起了人们的广泛关注。国内外关于PFCs的环境行为研究主要集中于水体和沉积物，而对作为PFCs重要归趋的土壤介质研究甚少；同时，关于PFCs的土壤生态毒理学研究多限于土壤动物，对更易受PFCs影响的微生物的毒性研究却鲜有报道。本项目拟在室内模拟的条件下，以不同碳链长度的典型PFCs为研究对象，围绕土壤中PFCs的环境行为及微生物响应这一主线，运用先进的化学分析技术、微量热技术、传统微生物技术及现代分子生物学技术等手段，探索PFCs在土水界面的吸附机理，并从能量代谢角度和分子水平上阐明PFCs对土壤微生物的生态毒性及土壤微生物响应机制。本项目的实施将形成环境地球化学、生物热化学和微生物学等多学科交叉渗透的新途径，为研究土壤中PFCs的环境地球化学行为及评价其对土壤微生物的生态风险提供科学依据和理论基础。

全氟化合物（PFCs）在全球范围内的各环境介质中已被检出，其环境持久性和对生物体的危害性引起了人们的广泛关注。国内外关于PFCs的环境行为研究主要集中于水体和沉积物，而对作为PFCs重要归趋的土壤介质研究甚少；同时，关于PFCs的土壤生态毒理学研究多限于土壤动物，对更易受PFCs影响的微生物的毒性研究却鲜有报道。本项目在室内模拟的条件下，以不同碳链长度的典型PFCs为研究对象，围绕土壤中PFCs的环境行为及微生物响应这一主线，运用先进的化学分析技术、微量热技术、传统微生物技术及现代分子生物学技术等手段，探索了PFCs在土水界面的吸附机理，并从能量代谢角度和分子水平上阐明了PFCs对土壤微生物的生态毒性及土壤微生物响应机制。本项目的实施形成了环境地球化学、生物热化学和微生物学等多学科交叉渗透的新途径，为研究土壤中PFCs的环境地球化学行为及评价其对土壤微生物的生态风险提供了科学依据和理论基础。该项目的相关研究工作共发表学术论文6篇，其中SCI收录4篇，EI收录1篇，中文核心期刊1篇；培养博士生1名，硕士生2名，本科生3名。该项目较好的完成了研究任务。