有效吸附重金属使用由城市固体废物焚烧飞灰液合成的弗里德尔盐
Yushan Guan1, Yan Xia1, Liang Chen2
1State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China; Qingshanhu Energy Research Center, Zhejiang University, Hangzhou, 311300, China.
Environmental research
|July 10, 2025
概括
这项研究将危险的城市固体废物焚烧飞灰 (MSWIFA) 液转化为有价值的弗里德尔盐吸附剂. 合成的材料有效地去除像CrVI和CdII这样的重金属,提供可持续的废物管理解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 城市固体废物焚烧飞灰 (MSWIFA) 含有危险污染物和可溶化物,需要脱以确保安全利用.
- 来自MSWIFA处理的液会给环境带来风险,需要昂贵的净化.
- 目前的MSWIFA资源利用方法通常涉及能源密集型过程.
研究的目的:
- 开发一种新的,可扩展的共降策略,用于从MSWIFA洗液中合成弗里德尔盐.
- 评估在现场合成的弗里德尔盐作为有效吸附剂去除重金属的潜力.
- 探索对危险的MSWIFA水的可持续废物利用途径.
主要方法:
- 来自MSWIFA洗液的弗里德尔盐在现场合成的共同沉策略.
- 优化合成条件,包括pH值,Ca/Al比率和温度.
- 吸附实验以确定Cr (VI) 和Cd (II) 去除能力.
- 合成材料的表征和吸附机制的阐明,使用像X射线光电谱等技术.
主要成果:
- 高纯度 (95%) 结晶的弗里德尔盐是在最佳条件下合成的 (pH12.5,Ca/Al比率1:1,40°C).
- 合成的弗里德尔盐对Cr (VI) (132.5 mg/g) 和Cd (II) (680.1 mg/g) 具有很好的吸附能力.
- 合成的弗里德尔盐的性能超过了许多基于酸盐的吸附剂.
- 同型置换和层间交换被确定为关键的吸附机制.
结论:
- MSWIFA洗液可以有效地转化为一种有价值的吸附材料 (弗里德尔盐).
- 开发的共同沉方法为废物利用提供了一种可持续和可扩展的方法.
- 这项研究为危险固体废物资源利用和环境整治提供了新的视角.
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