二氧化废弃物的回收利用:通过铁,和修饰增强聚硫酸盐的生产
Chenglin Liu1, Xinyang Xu1, Huaiting Qin1
1National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, People's Republic of China.
Environmental technology
|February 12, 2026
概括
这项研究将二氧化废物转化为高性能聚硫酸盐 (PFS) 凝固剂. 这种循环经济方法通过回收硫酸铁废弃物来降低成本和环境影响.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 二氧化 (TiO2) 工业生产大量不纯铁二硫酸盐单 (FeSO4·H2O) 废物,这给环境和经济带来了挑战.
- 有效的废物利用对于可持续的工业实践和资源管理至关重要.
研究的目的:
- 开发一种用于将TiO2工业废物 (FeSO4·H2O) 转化为高性能聚硫酸盐 (PFS) 凝固剂的新方法.
- 调查铁粉在废物价值化中的同时酸中和铁丰富的使用.
- 优化使用氧硫酸和的修改策略,以提高凝血性能.
主要方法:
- 使用铁粉中和自由酸并丰富废弃物FeSO4·H2O中的铁含量.
- 优化了Fe/FeSO4·H2O摩尔比率,以实现所需的PFS产品特性.
- 研究了与氧硫酸和的修改,以使用确认Ti4+结合和键形成的技术来表征产生的PFS.
主要成果:
- 开发了一种含有20.33%总铁和16.63%基本度的固体PFS产品,在最佳条件下实现了80.20%的度去除 (Fe/FeSO4·H2O摩尔比率=0.24).
- 氧硫酸的修饰 (Ti/Fe = 0.4) 提高了度去除到92.1%.
- 修饰 (Ca/Fe = 0.01) 以较低的成本实现了91.25%的度去除,其特征证实了Ti4+和Ca2+的结合以及增强的凝固特性.
结论:
- 开发的废弃物到资源战略有效地将FeSO4·H2O废弃物利用为高性能PFS凝固剂.
- 用氧硫酸或进行修改,可显著提高凝血效率,为水处理提供量身定制的解决方案.
- 这种方法为TiO2行业提供了一个经济上可行的循环经济解决方案,将生产成本降低了25-35%.
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