六价随着时间的推移从含Cr的烧化制厂污泥中释放出来
Lisa Ghezzi1, Enrico Mugnaioli2, Natale Perchiazzi2
1Department of Earth Science, University of Pisa, Via S. Maria 53, 56126, Pisa, Italy. lisa.ghezzi@unipi.it.
Scientific reports
|September 28, 2023
概括
皮厂废物 (KEU) 的热解可以在暴露于空气和水分时将 (III) 转化为有毒的 (VI). 这种转化将惰性废物转化为危险材料,影响环境安全.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 废物管理 废物管理
背景情况:
- 热解用于将皮革厂废物转化为可重复使用的材料.
- 皮革厂废弃物含有,可存在不同的氧化状态.
研究的目的:
- 研究 (III) 在烧化制废物 (KEU) 中转化为有毒 (VI).
- 了解促进这种危险转变的条件.
主要方法:
- 进行了老化实验和浸出试验.
- 微结构分析被用来检查矿物学变化.
- 该研究的重点是通过热解生成的KEU材料.
主要成果:
- 在环境温度下暴露于空气和水分时, (III) 转化为KEU中的 (VI).
- 在热解过程中形成的矿物相在冷却过程中不稳定,促进氧化.
- 新形成的氧化氧化 (CrOOH) 片是CrVI形成的关键中间体.
结论:
- 烧化皮厂废物 (KEU) 当暴露在环境条件下时可能变得危险.
- 在Cr (III) -Cr (VI) 相互转换带来环境风险.
- 要防止危险的Cr6形成,必须小心处理和储存KEU.
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