Contact angle measurement system for environmental surface science research

细菌表面、油水界面和多孔介质表面的表征需要接触角测量系统。这些表面的表征将允许制定策略，以改善受石油污染、病原体和有毒纳米颗粒剂污染的场所的环境质量。接触角测量系统根据表面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征。接触角测量系统将用于支持两个申请者的合作研究。将使用该仪器的一个主要研究计划旨在制定快速清理石油污染土壤的战略。接触角测量系统将使我们能够研究各种污染物降解菌在油水界面上的黏附。这些信息将被用来确定如何通过地下水有效地将污染物降解菌输送到受污染场地的受影响区域。所要求的仪器还将用于研究土壤和含水层中石油溢出在加拿大典型低温下的动员行为。接触角测量系统将用于调查胶体环境污染物，如人造纳米材料和水性病原体在含水层沙子和土壤中以及在废水处理系统中的传输和滞留。含水层中存在O157：H7、隐孢子虫等水媒病原体和寄生虫，以及有毒的金属纳米颗粒，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细菌以及土壤颗粒或其他表面的表面特性，以便于了解影响其运输的环境参数。

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.