Sustainable Water Recovery from a Hydrometallurgical Effluent Using Gas Hydrate-Based Desalination in the Presence of CO2 Nanobubbles

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-07-19 DOI:10.1007/s42461-024-01046-7

Seyed Mohammad Montazeri, Georgios Kolliopoulos

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Abstract

Hydrometallurgical processes generate large volumes of aqueous effluents, which are being treated and disposed in tailings ponds. Effluent desalination, i.e., clean water recovery for reuse in process circuits, is key to attain a zero liquid discharge future in the industry. In this study, we report on the use of hydrate-based desalination (HBD) to treat a synthesized effluent from the zinc industry. HBD is an innovative, energy-efficient, and sustainable desalination technology, capable to treat hydrometallurgical effluents to recover water in the form of gas hydrates by consuming CO₂. Water recovery and total dissolved solids (TDS) removal efficiency of 42 ± 2% and 60 ± 4% were achieved in a three-stage HBD process. Further, CO₂ nanobubbles (NBs) were tested as a sustainable kinetic promoter of the process. The desalination outcomes verified that CO₂ NBs played a crucial role in enhancing the kinetics of the process. Specifically, the presence of CO₂ NBs resulted in a notable increase in water recovery, which reached 60 ± 2%, accompanied by a TDS removal efficiency of 53 ± 1% in a three-stage HBD process.

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在二氧化碳纳米气泡存在的情况下利用气体水合物脱盐技术从湿法冶金废水中可持续地回收水资源

湿法冶金工艺会产生大量的含水废水，这些废水正在尾矿池中进行处理和弃置。废水脱盐，即回收清洁水供工艺回路重复使用，是该行业未来实现液体零排放的关键。在本研究中，我们报告了使用水合物海水淡化 (HBD) 处理锌工业合成废水的情况。HBD 是一种创新、节能、可持续的海水淡化技术，能够处理湿法冶金废水，通过消耗二氧化碳回收气体水合物形式的水。在三级 HBD 工艺中，水回收率和总溶解固体（TDS）去除率分别达到 42±2% 和 60±4%。此外，还对二氧化碳纳米气泡（NBs）作为该工艺的可持续动力学促进剂进行了测试。海水淡化结果证实，二氧化碳纳米气泡在提高工艺动力学方面发挥了关键作用。具体而言，在三级 HBD 工艺中，二氧化碳纳米气泡的存在显著提高了水回收率，达到 60 ± 2%，同时 TDS 去除效率为 53 ± 1%。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.