Abstract The copper sulfide precipitation is a selective and efficient method for the recovery or removal of metals. However, the suspension behavior, and particularly the aggregation performance of generated precipitates, is still under investigation. In this context, the current work focuses on the assessment of the aggregation size evolution of copper sulfide precipitates at different operational conditions, based on FBRM. This method can measure non-invasive, in-situ and real-time the particle aggregation evolution in a suspension. A copper sulfide precipitation reaction was carried out using an experimental design varying pH, sulfide dosage, and copper concentration in the feed solution. The copper concentration had the most significant effect on the aggregates size, showing a high aggregation behavior above 1000 mg/L Cu, instead 200 mg/L where this tendency was negligible. This study is the first one to use FBRM in copper precipitates and its results can be used to support future studies to improve solid-liquid separation processes.

中文翻译：

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使用聚焦光束反射测量 (FBRM) 进行硫化铜沉淀物的原位和实时聚集尺寸演变

摘要 硫化铜沉淀法是一种选择性、高效的回收或去除金属的方法。然而，悬浮行为，特别是生成的沉淀物的聚集性能，仍在研究中。在这种情况下，当前的工作重点是基于 FBRM 评估不同操作条件下硫化铜沉淀物的聚集尺寸演变。该方法可以非侵入性、原位和实时地测量悬浮液中的颗粒聚集演化。使用实验设计改变进料溶液中的 pH、硫化物剂量和铜浓度，进行硫化铜沉淀反应。铜浓度对聚集体尺寸的影响最显着，在 1000 mg/L Cu 以上表现出高聚集行为，取而代之的是 200 mg/L，这种趋势可以忽略不计。这项研究是第一个在铜沉淀物中使用 FBRM 的研究，其结果可用于支持未来的研究，以改进固液分离过程。