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使用自动温度控制系统从反透废水中回收盐水:盐结晶

Jumanne Mayige Shimba^1,2, Oscar Ezekiel Njau¹, Juma Selemani¹

¹School of Materials, Energy, Water, and Environmental Sciences, Nelson Mandela African Institution of Science and Technology (NM-AIST), P.O. Box 447, Arusha, Tanzania.

Water science and technology : a journal of the International Association on Water Pollution Research

|May 1, 2025

概括

这项研究表明,自动温度控制 (ATC) 可以从工业逆透 (RO) 盐水中回收盐. ATC为管理盐水废水及其对环境的影响提供了一个有前途的解决方案.

科学领域:

环境科学环境科学
化学工程是化学工程的重要组成部分.
材料科学材料科学材料科学

背景情况:

来自工业反透 (RO) 过程的盐水废水不当处置会导致严重的环境问题,包括土壤退化和对鸟类野生动物的伤害.
目前的处理方法只提供短期解决方案,混合盐副产品的分离仍然是一个持续的挑战.

研究的目的:

评估本地可用的自动温度控制 (ATC) 系统的有效性,用于通过结晶的方式从RO废水中回收盐.
评估结温度,度和接触时间对盐回收效率的影响.

主要方法:

实验室规模的批量实验使用单个和混合盐样本 (NaCl·2H2O,Na2SO4·10H2O,Na2CO3·10H2O) 进行.
该研究调查了不同结温度,盐度和接触时间对结晶过程的影响.

主要成果:

单个盐的最大回收效率是:NaCl·2H2O在-26°C (72小时) 时达到85.3%,Na2SO4·10H2O在-10°C (96小时) 时达到93.3%,Na2CO3·10H2O在-2°C (2小时) 时达到32.0%.
对于混合样品 (-10°C,3小时,50毫升),65.27% (29.37克) 的盐被回收,其特定的离子组成包括Na+ (34.1%),Cl− (1.6%),SO42− (11.3%),CO32− (32.4%) 和杂质 (20.57%).

结论:

自动温度控制 (ATC) 系统证明了作为工业和采矿RO过程中盐水回收的替代技术的潜力.
使用ATC有效的盐回收可以减轻与盐废水处理相关的环境问题.

关键词:

自动调节温度的自动控制器盐水盐水是什么意思结结晶化结晶化反透的反透是什么意思盐水晶中的盐水晶.

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