Replacement Type I Deionized Water System to Facilitate Trace Mercury Analyses

汞（Hg）是一种急性神经毒性和内分泌干扰化学物质，在食物网中生物放大，导致高营养级生物的神经和生殖影响。汞污染是一个全球性问题，在可预见的未来，将对汞敏感生态系统中的人类和食物网构成越来越大的健康风险。Nelson O'Driscoll博士于2007年加入Acadia，担任加拿大环境生物地球化学二级研究主席，是环境生物地球化学领域的领导者，特别是在汞物种形成领域。他的团队发表了许多关于生态系统中汞的物种形成及其区域和全球分布的新发现和基本见解。******为了测量水和其他生态系统成分中痕量汞的形态，需要一个高质量的I型去离子水（DI）来源。正在请求资金购买一种新的净水系统，以生产最高质量的第一类去离子水。O'Driscoll博士在阿卡迪亚现有的DI系统已经使用了15年，现在已经坏了。它需要更换的部件不再从供应商（该型号已停产），而且不具备本研究计划所需的水质。******所要求的离子专用水系统（milliq IQ7003/Element）对于新项目的开展和许多正在进行的研究项目以及本科生和研究生论文的成功完成至关重要。这将是加拿大东部唯一可用的此类系统。它有许多优点，对O'Driscoll博士和他的团队进行的汞光化学和通量研究特别有用。要求升级的去离子水系统将提高我们当前项目所需分析的准确性和可重复性。这种升级的设备将促进最先进的分析能力，并将支持许多学生的工作和许多访问的国际合作者和学生的相关培训。许多学生（未来5年每年10到10名学生）将受益于该设备，该设备将连接几所国际大学的研究生培训。在这个研究项目中发展的科学直接被纳入预测模型，用于国家和国际层面的政策制定，最终将有助于保护人类和生态系统的健康。**

Mercury (Hg) is an acute neurotoxicant and endocrine-disrupting chemical that biomagnifies in food webs, resulting in neurological and reproductive effects in higher trophic level organisms. Mercury pollution is a global problem that will pose increasing health risks to humans and food webs in mercury sensitive ecosystems into the foreseeable future. Dr. Nelson O'Driscoll joined Acadia in 2007 as a Tier 2 Canada Research Chair in Environmental Biogeochemistry and is a leader in the field of environmental biogeochemistry, particularly in the area of mercury speciation. His group has published many new findings and fundamental insights into the speciation of mercury in ecosystems and its regional and global distribution. ******In order to measure mercury speciation at trace levels in water and other ecosystem components, a source of high-quality type I deionized water (DI) is necessary. Funds are being requested to purchase a new water purification system to generate the highest quality type I deionized water. Dr. O'Driscoll's existing DI system at Acadia is 15 years old and is now broken. It requires replacement parts which are no longer available from the supplier (the model has been discontinued), and in addition does not have the quality of water required for this research program. ******The requested ion-specific water system (Milli-Q IQ7003/Element) is critical to the undertaking of new projects and the successful completion of many ongoing research projects and undergraduate and graduate student theses. It will be the only available system of its kind in eastern Canada. It has many advantages that are particularly useful for the type of mercury photochemistry and flux research that is performed by Dr. O'Driscoll and his team. The requested upgraded deionized water system will allow for increased accuracy and reproducibility of analyses required for our current projects. This upgraded equipment will facilitate state-of-the-art analysis capabilities and will support the work of many students and the associated training of many visiting international collaborators and students. Many students (>10 students per year over next 5 years) will benefit from this equipment which will link graduate student training at several international universities. The science developed within this research program is directly incorporated into predictive models that are being used for policy development at national and international levels and will ultimately help to protect human and ecosystem health. **