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

采矿对加拿大非常重要，但它也带来了一些环境挑战。迈尔斯顿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。这些采矿废水含有较高水平的氨，由于对鱼类的氨毒性，这些废水不能直接排放到河流或湖泊中。里程碑希望开发一种基于氯胺化然后在催化活性碳上吸附的处理系统。氯胺化反应使用较少的氯化反应，比断点氯化反应更快，它将氨转化为一氯胺。然后，新开发的催化活性碳将被用来吸收氯胺，并将水制成鱼。里程碑希望为该治疗系统申请专利，但它需要在实验中证明该系统的有效性。迈尔斯顿已经联系了国防部的纳贝茨博士。根据他在水处理和吸附工艺方面的专业知识，土木工程经理将评估：a)该工艺可行的氨浓度范围；b)后续吸附步骤的最佳氯化pH值；c)评估不同的活性碳材料；以及d)所需的活性碳接触时间。这项实验室规模的研究将涉及多个批量吸附实验，使用的是pH调整的氯胺化和一些不同类型的活性碳、由不同材料制备的催化活性碳和常规活性碳。

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.