Contact angle measurement system for environmental surface science research

需要一种接触角测量系统来表征细菌表面、油水界面和多孔介质表面。这些表面的特征将有助于制定策略，以改善受石油污染或病原体和有毒纳米颗粒剂污染的地点的环境质量。接触角测量系统根据表面上液滴的图像确定各种液体的表面张力和固体表面的表面特性。接触角测量系统将用于支持两位申请人的合作研究。该仪器将用于一个主要的研究方案，其目的是制定迅速清理受石油污染的土壤的战略。接触角测量系统将使我们能够研究各种污染物降解细菌在油水界面上的粘附性。这些信息将用于确定如何通过地下水将污染物降解细菌有效地输送到受污染地点的受影响地区。所要求的仪器还将用于研究加拿大典型的低温条件下溢油在土壤和含水层中的动员行为。接触角测量系统将用于研究胶体环境污染物（如人造纳米材料和水传播病原体）在含水层砂和土壤以及废水处理系统中的运输和保留。水媒病原体和诸如大肠杆菌O157:H7、隐孢子虫等寄生虫以及含水层中有毒金属纳米颗粒的存在对公众健康构成严重威胁。所要求的设备将使我们能够表征人造纳米颗粒和致病菌以及土壤颗粒或其他表面的表面特性，以促进对影响其运输的环境参数的理解。

A Contact Angle Measurement system is requested for characterization of bacterial surfaces, oil-water interfaces, and porous media surfaces.  The characterization of these surfaces will allow development of strategies to improve the environmental quality at sites contaminated by oil pollution, or by pathogens and toxic nano-particle agents.  The Contact Angle Measurement system determines surface tension of various liquids and surface characteristics of solid surfaces from images of liquid drops on surfaces. The Contact Angle Measurement system will be used to support the collaborative research of two applicants.  A major research program, for which the instrument will be used, is aimed at developing strategies for rapid clean-up of petroleum-contaminated soils. The Contact Angle Measurement system will allow us to study the adhesion of various pollutant-degrading bacteria on oil-water interfaces.  The information will be used to determine how pollutant-degrading bacteria can be effectively delivered through groundwater to impacted areas of contaminated sites. The requested instrument will be used also to study the mobilization behaviour of oil spills in soils and aquifers under cold temperatures typical to Canada.   The Contact Angle Measurement system will be used to investigate the transport and retention of colloidal environmental contaminants such as manufactured nano-materials and waterborne pathogens in aquifer sands and soils, and in wastewater treatment systems. The presence of waterborne pathogens and parasites such as E. coli O157:H7, Cryptosporidium and of toxic metallic nano-particles in aquifers pose serious threats to public health. The requested equipment will allow us to characterize the surface properties of manufactured nano-particles and pathogenic bacteria and of soil particles or other surfaces to facilitate understanding of the environmental parameters that influence their transport.