Enrica Fontananova, Elvira Pantuso, Laura Donato, Elisa Esposito, Rosanna Rizzi, Rocco Caliandro, Gianluca Di Profio
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引用次数: 0
摘要
采矿业排放的废水对生态环境造成严重影响,可能危及土壤和海洋生态系统。或者,通过技术上高效的工艺从这些超高盐水流中回收纯水和有价值的材料,将有助于减少废物对生态的影响,同时为镁、钾等对经济至关重要的原材料提供可行的供应链。在此背景下,这项工作旨在通过膜辅助结晶(MAC)同时回收矿山废水中的纯水和矿物盐。之前基于热力学参数的理论研究试图预测盐在不同温度下的沉淀情况。然后,在特定的热梯度和进料预处理条件下进行了 MAC 试验,从实际矿山尾矿废水中优先析出了含有大量 Ca 或 Mg/K 矿物质的不同成分的固体产品。实验还证明了异质成核效应的核心影响。
Turning mine-tailing streams into sources of water and mineral salts in a membrane-sustained circular scenario
The discharge of wastewater from the mining industry has a critical ecological impact, potentially endangering both soil and marine ecosystems. Alternatively, recovering pure water and valuable materials from these hypersaline streams through a technologically efficient process, would help reduce the ecological impact of the waste, while providing a viable supply chain for raw materials such as magnesium, potassium and others, considered critical to the economy. In this context, this work aimed to simultaneously recover pure water and mineral salts from mine wastewater by membrane-assisted crystallization (MAC). A prior theoretical study based on thermodynamic parameters attempted to predict salts precipitation at different temperatures. MAC tests were then performed at specific thermal gradients and feed pretreatment conditions, achieving preferential precipitation of solids products of different composition containing large quantities of Ca or Mg/K minerals from the real mine tailing wastewater. The experiments also demonstrated the central impact of heterogeneous nucleation effects.
npj Clean WaterEnvironmental Science-Water Science and Technology
CiteScore
15.30
自引率
2.60%
发文量
61
审稿时长
5 weeks
期刊介绍:
npj Clean Water publishes high-quality papers that report cutting-edge science, technology, applications, policies, and societal issues contributing to a more sustainable supply of clean water. The journal's publications may also support and accelerate the achievement of Sustainable Development Goal 6, which focuses on clean water and sanitation.