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品，在食物网中具有生物放大作用，对高营养级生物的神经和生殖产生影响。汞污染是一个全球性问题，在可预见的未来，汞污染将对人类和汞敏感生态系统中的食物网构成越来越大的健康风险。纳尔逊O 'Drivel博士于2007年加入加拿大环境生物地球化学研究中心，担任加拿大环境生物地球化学领域的二级研究主席，是环境生物地球化学领域的领导者，特别是在汞形态研究领域。他的小组发表了许多关于汞在生态系统中的形态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组成部分中痕量水平的汞形态，需要高质量的I类去离子水（DI）来源。正在申请资金，以购买一个新的净水系统，生产最高质量的第一类去离子水。O 'Drivel博士现有的DI系统已经有15年的历史了，现在已经坏了。它需要从供应商处不再提供的更换部件（该型号已停产），此外，也不具备本研究计划所需的水质。** 所要求的特定离子水系统（Milli-Q IQ 7003/Element）对于开展新项目和成功完成许多正在进行的研究项目以及本科生和研究生论文至关重要。这将是加拿大东部唯一可用的同类系统。它具有许多优点，特别适用于O 'Drivel博士和他的团队进行的汞光化学和通量研究。所要求的升级去离子水系统将提高我们当前项目所需分析的准确性和重现性。升级后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来访的国际合作者和学生的相关培训。许多学生（未来5年每年超过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。该研究计划中开发的科学直接纳入预测模型，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. **