Environmental applications of high purity dolomite as flocculant, oxydant and metal precipitator

高纯白云石作为絮凝剂、氧化剂和金属沉淀剂的环保应用

• 批准号: 445679-2012
• 负责人: GalvezCloutier, Rosa
• 金额: $ 4.74万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=535956
• 关键词: Environmental; applications; purity; dolomite; flocculant

In a society that is in constant change and development, the increased use of our natural resources is irreversible. Canada's exploitable natural resources foster dependence on our primary industry sectors - mining, energy (petroleum, hydropower) and agriculture. Unfortunately, these activities harm the environment because of their associated pollution. Thus, following principles of sustainable development, it is necessary to provide these industries with new techniques for not only managing environmental pollutants but also striving towards environmental restoration. The proposed project wants to develop new environmental applications of a carbonate sedimentary rock called dolomite. The active mineral dolomite (CaMg (CO3)2) is currently known for its use in agriculture including liming. In this project, a high purity dolomite will be used in a new application as a coagulant and disinfectant (oxidant). Three environmental applications are targeted through this project: acid mine drainage, agricultural runoff and landfill leachates. These matrices will be treated with dolomite under different physical characteristics ranging from the size of gravel (to be used in reactive filters) to fine-grained powder (to be used in reactors as a neutralizer). This project will generate new knowledge (chemistry and geochemistry of a new natural product) and apply existing abilities in eco-design and the engineering of reactors to develop innovative mitigation for significant environmental impacts due to pollution by acid mine drainage, agricultural runoff and landfill leachates.

在一个不断变化和发展的社会中，增加对我们自然资源的使用是不可逆转的。加拿大可开发的自然资源助长了对我们的第一产业部门-采矿、能源（石油、水电）和农业-的依赖。不幸的是，这些活动由于其相关的污染而损害环境。因此，根据可持续发展的原则，有必要为这些工业提供新技术，不仅管理环境污染物，而且努力恢复环境。该项目旨在开发一种名为白云石的碳酸盐沉积岩的新环境应用。活性矿物白云石（CaMg（CO 3）2）目前已知用于农业，包括石灰。在该项目中，高纯度白云石将用于混凝剂和消毒剂（氧化剂）的新应用。该项目的目标是三种环境应用：酸性矿井排水、农业径流和垃圾填埋场沥滤液。这些基质将用不同物理特性的白云石处理，从砾石大小（用于反应过滤器）到细粒粉末（用于反应堆中作为中和剂）。该项目将产生新的知识（一种新的天然产品的化学和地球化学），并将现有的生态设计和反应堆工程能力应用于开发创新的缓解措施，以减轻酸性矿山排水、农业径流和垃圾填埋场沥滤液造成的污染对环境的重大影响。