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Solving mine drainage water issues with peat-based sorption media

机译:用泥炭基吸附介质解决矿井排水问题

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摘要

The Soudan Mine was Minnesota's first iron mine, operating from 1882 to 1962. The mine was donated to the State of Minnesota in 1963 and became a state park in 1965. The mine discharge contains elevated copper and cobalt concentrations and has been treated with an ion-exchange-resin-based system since 2009. The system includes flow equalization tanks, bag and cartridge filters, a carbon tank and two commercial ion exchange tanks. Although effective, the system's high cost, inefficient removal of suspended material and substantial maintenance have been ongoing and troublesome issues. In November 2012, we initiated a pilot test using a peat-based sorption media. This media is produced from raw reed-sedge peat through a patented, low-temperature carbonization process that produces a hardened granular sorption material. The granules are uniform, have high hydraulic conductivity and maintain the high metal affinity of natural peat.
机译:Soudan矿是明尼苏达州的第一座铁矿,始建于1882年至1962年。该矿于1963年捐赠给明尼苏达州,并于1965年成为州立公园。矿山的排泄物中铜和钴的含量较高,并经过离子处理。自2009年起基于交换树脂的系统。该系统包括流量均衡罐,袋式和筒式过滤器,一个碳罐和两个商用离子交换罐。尽管有效,但是该系统的高成本,低效的悬浮物去除和大量维护一直在进行并且是麻烦的问题。 2012年11月,我们开始使用基于泥炭的吸附介质进行中试。该介质是通过获得专利的低温碳化过程由原始芦苇草皮泥炭制成的,该过程会产生硬化的颗粒状吸附材料。颗粒均匀,具有高的水力传导性,并保持天然泥炭的高金属亲和力。

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