Mine tailings are one of the main sources of dissolved arsenic (As) in groundwater. In the present study, an investigation was conducted on the efficiency of sophorolipids, at different concentrations and pH levels and at two different temperatures (15°C and 23°C), to remove arsenic and heavy metals from mine tailings. Furthermore, the effect of sophorolipids on the speciation of arsenic and the effectiveness of sophorolipids on different fractions of the specimens were investigated by way of sequential extraction. After the treatment of the specimens with a solution of 1% sophorolipids at pH 5 and 23°C, 0·7% of the total removed arsenic was from the water-soluble portion of the mine tailing sample, 0·7% was from the exchangeable portion, 0·6% was from the carbonates, 29·9% was from the oxide/hydroxide fraction, 3·0% was from the organic portion and 65·1% was from the residual fraction of the specimen. The results from this study can help develop a sustainable and environment-friendly solution for the remediation of mine tailings.

中文翻译：

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槐糖脂去除矿山尾矿中砷的效率

矿山尾矿是地下水中溶解砷的主要来源之一。在本研究中，对在不同浓度和pH值以及两个不同温度（15°C和23°C）下槐糖脂的效率进行了研究，以从矿山尾矿中去除砷和重金属。此外，通过顺序提取的方法研究了槐糖脂对砷形态的影响以及槐糖脂在不同比例样品中的有效性。在pH 5和23°C下用1％槐糖脂溶液处理样品后，去除的总砷中的0.7％来自矿山尾矿样品的水溶性部分，0.7％来自矿山尾矿样品。可交换部分，0·6％来自碳酸盐，29·9％来自氧化物/氢氧化物部分，3×0％来自有机部分，65·1％来自样品的剩余部分。这项研究的结果可以帮助开发一种可持续且环境友好的解决方案来治理矿山尾矿。