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首页> 外文期刊>Environmental toxicology and chemistry >METAL REMOVAL EFFICIENCY AND ECOTOXICOLOGICAL ASSESSMENT OF FIELD-SCALE PASSIVE TREATMENT BIOCHEMICAL REACTORS
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METAL REMOVAL EFFICIENCY AND ECOTOXICOLOGICAL ASSESSMENT OF FIELD-SCALE PASSIVE TREATMENT BIOCHEMICAL REACTORS

机译：现场大规模被动处理生化反应器的金属去除效率和生态毒理学评估

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Anaerobic biochemical reactors (BCRs) are useful for removing metals from mining-impacted water at remote sites. Removal processes include sorption and precipitation of metal sulfides, carbonates, and hydroxides. A question of interest is whether BCRs remove aquatic toxicity. Influent and effluent samples from the Luttrell Repository and Peerless Jenny King, both in Montana, USA; Park City, Utah, USA; and Standard Mine, Colorado, USA, were examined and compared for removal of metals and aquatic toxicity. Effluent samples from Standard Mine included those having solely BCR treatment and those having BCR treatment followed by aeration in a polishing cell. Metal removal for all sites was >90%. All influent samples were acutely toxic to Ceriodaphnia dubia and Pimephales promelas; toxicity was removed following treatment, except in the Luttrell Repository and Standard Mine BCR samples. Laboratory aeration of undiluted samples eliminated (Standard Mine BCR) or significantly reduced (Luttrell Repository, 65% survival) acute toxicity, most likely through removal of hydrogen sulfide. A toxicity identification evaluation suggested that metals also might be contributing to toxicity in the Luttrell Repository effluent samples; metals other than Mn were either not detected or very low (Fe and Pb) in the Standard Mine BCR samples. Field-aerated samples were not acutely toxic, and only the Luttrell Repository and Standard Mine samples showed short-term subchronic toxicity. Overall, results indicated BCR treatment had high metal removal efficiency and that inclusion of in-field aeration was beneficial in removal of acute and short-term subchronic toxicity.
机译：厌氧生化反应器（BCR）可用于从偏远地区的采矿影响水中去除金属。去除过程包括金属硫化物，碳酸盐和氢氧化物的吸附和沉淀。感兴趣的问题是BCR是否能消除水生毒性。来自美国蒙大纳州的Luttrell仓库和Peerless Jenny King的进水和出水样品；美国犹他州帕克城；和美国科罗拉多州标准矿山进行了检查，并比较了金属和水生毒性的去除。来自标准矿山的废水样品包括仅经过BCR处理的样品和经过BCR处理然后在抛光池中充气的样品。所有位置的金属去除率均> 90％。所有进水样品对杜鹃花和Pimephales promelas具有急性毒性。除Luttrell储存库和标准矿井BCR样品外，处理后均消除了毒性。实验室中未稀释样品的通气被消除（标准矿井BCR）或显着降低（鲁特尔储存库，存活率65％）的急性毒性，最有可能是通过去除硫化氢而实现的。毒性鉴定评估表明，金属可能也有助于Luttrell储存库废水样品的毒性。在标准矿山BCR样品中未检测到锰以外的其他金属，或者含量极低（铁和铅）。野外充气的样品没有剧毒，只有Luttrell仓库和标准矿场样品显示出短期亚慢性毒性。总体而言，结果表明BCR处理具有较高的金属去除效率，并且加入野外曝气有助于去除急性和短期亚慢性毒性。

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