Treatment of explosives impacted mining wastewaters.******

处理受爆炸物影响的采矿废水。*****

• 批准号: 535910-2018
• 负责人: Narbaitz, Roberto
• 金额: $ 1.82万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=660657
• 关键词: Treatment; explosives; impacted; mining; wastewaters.

Mining is very important to Canada but it creates a number of environmental challenges. Milestone Environmental Inc. is extending their current water treatment portfolio into the mining environmental equipment/services sector. Accordingly, this company is seeking to develop a treatment system for water that becomes contaminated with the residuals of explosives. These mining wastewaters contain relatively high levels of ammonia, and due to ammonia toxicity to fish these waters cannot be discharged directly into rivers or lakes. Milestone hopes to develop a treatment system based on chloramination followed by sorption on catalytic activated carbon. Chloramination, which uses less chlorination and is faster than breakpoint chlorination, converts the ammonia to monochloramine. Newly developed catalytic activated carbons will then be used to sorb the chloramines and make the water to fish. Milestone hopes to patent the treatment system, but it needs to experimentally demonstrate the effectiveness of the system. Milestone has contacted Dr. Narbaitz of the Dept. of Civil Engineering based on his expertise on water treatment and sorption processes to evaluate: a) the range of ammonia concentrations for which the process is practical; b) optimal chlorination pH for the subsequent sorption step; c) evaluate different activated carbon materials; and d) the activated carbon contact period required. The lab-scale study will involve multiple batch sorption experiments using pH adjusted chloraminated and a number of different types of activated carbons, catalytic as well as conventional activated carbon prepared from different materials.

矿业对加拿大非常重要，但它也带来了许多环境挑战。Milestone环境公司正在将其目前的水处理产品组合扩展到采矿环境设备/服务部门。因此，该公司正在寻求开发一种处理被爆炸物残留物污染的水的系统。这些采矿废水沃茨含有相对高水平的氨，并且由于氨对鱼的毒性，这些沃茨不能直接排放到河流或湖泊中。 Milestone希望开发一种基于氯胺化然后吸附在催化活性炭上的处理系统。氯胺化，它使用较少的氯化，比断点氯化更快，将氨转化为一氯胺。新开发的催化活性炭将被用来吸附氯胺，使水的鱼。Milestone希望为该处理系统申请专利，但需要通过实验证明该系统的有效性。 Milestone已经联系了部门的Narbaitz博士根据他在水处理和吸附工艺方面的专业知识，他在土木工程学院担任首席执行官，以评估：a）该工艺适用的氨浓度范围; B）后续吸附步骤的最佳氯化pH值; c）评估不同的活性炭材料;以及d）所需的活性炭接触时间。 实验室规模的研究将涉及多个批次的吸附实验，使用pH值调节的氯胺和一些不同类型的活性炭，催化以及从不同材料制备的传统活性炭。