在水软化过程中,CaCO3的同质和异质结晶之间的竞争
Xiaobao Nie1, Zhengbo Wang2, Junli Wan1
1School of Hydraulic & Environmental Engineering, Changsha University of Science and Technology, No. 960, Section 2, Wanjiali South Road, Tianxin District, Changsha 410114, China; Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China.
Water research
|December 27, 2023
概括
这项研究引入了一种使用磁石种子来区分和控制水软化过程中碳酸结晶的新方法. 优化条件可以抑制不必要的同质结晶,提高水处理效率.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 在种子诱导的水软化过程中,碳酸 (CaCO3) 的均质和异质结晶同时发生.
- 抑制均质结晶对于防止阻碍降水的细颗粒形成至关重要.
- 区分这两种结晶类型是具有挑战性的,但对于优化水软化过程至关重要.
研究的目的:
- 开发一种新的方法来区分使用磁石种子颗粒的同质和异质CaCO3结晶.
- 研究和指数 (SI),种子剂量和颗粒大小对同质和异质结晶之间的竞争的影响.
- 评估种子诱导结晶在提高水软化效率和去除硬度方面的有效性.
主要方法:
- 用磁石作为种子颗粒来区分同质和异质的CaCO3结晶.
- 多种和指数 (SI),种子剂量和平均颗粒大小,以分析它们对结晶的影响.
- 进行水软化试点测试,以评估CaCO3层形成和硬度去除效率.
主要成果:
- 和指数 (SI) 是两种结晶类型的主要驱动因素;在低SI时偏好异质结晶,而在高SI时偏好同质结晶.
- 同质结晶的最佳抑制发生在SI约为1.01.的SI.
- 较高的种子剂量和较小的种子颗粒大小促进了异质结晶,抑制了同质结晶.
- 由于异质结晶在低SI的适应性,二氧化碳吸收到溶液中提高了除硬性效率.
- 软化水的试点测试表明,SI值为1.5对于CaCO3层的形成和硬度去除是最佳的.
结论:
- 种子颗粒的引入,特别是磁铁是抑制水软化中同质CaCO3结晶的有希望的策略.
- 控制SI,种子剂量和颗粒大小允许优先促进异质结晶.
- 这项研究为增强种子诱导结晶技术提供了一个框架,以更有效地软化水.
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