Mining is an activity that, along with providing essential materials for the development of humanity, produces pollution through the massive generation of mining waste and prolonged spills carried out in times when environmental control and protection were minimal. One of the ways to promote strategies for the valorization of mining-impacted soils is through the commercial impulses that exist behind it. For example, obtaining valuable materials with low treatment costs is highly desired compared to massive remediation tasks. Thus, this work focuses on obtaining copper salts with commercialization potential from mining-contaminated soils. The approach was addressed in two steps: by leaching and crystallization. The soil was leached with seawater at different conditions of pH, solid/liquid ratio, and number of recycling stages, achieving recoveries exceeding 70%. Crystallization was carried out under ambient conditions for water evaporation, obtaining crystals of copper chloride with high concentration. In this study, the obtained copper salts have a market, and the process resulted in a significant diminution of metal concentration in soils, becoming a remediation strategy that can be evaluated in larger scale.

中文翻译：

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受采矿影响的土壤的湿法冶金处理：通过海水淋滤和结晶回收铜盐的初步研究

采矿活动除了为人类发展提供必需的材料外，还通过在环境控制和保护极少的情况下大量产生采矿废物和长期泄漏而产生污染。促进受采矿影响土壤增值战略的方法之一是通过其背后存在的商业冲动。例如，与大规模的修复任务相比，人们非常希望以较低的处理成本获得有价值的材料。因此，这项工作的重点是从采矿污染的土壤中获取具有商业化潜力的铜盐。该方法分两个步骤：浸出和结晶。采用不同pH值、固液比和循环次数条件下的海水对土壤进行淋洗，回收率超过70%。常温条件下蒸发水分，得到高浓度氯化铜晶体。在这项研究中，获得的铜盐具有市场，并且该过程导致土壤中的金属浓度显着降低，成为可以进行更大规模评估的修复策略。