在水中提取的溶液中通过合石的吸附和通过结的稳定来去除重金属
Chang-Jung Sun1, Sue-Huai Gau2, Yu-Kai Huang3
1Department of Environmental Engineering, Dongguan City University, Guangdong, China.
概括
帕利戈尔斯基特有效吸附城市固体废物焚烧飞灰液中的重金属,防止污染. 用飞填充进一步稳定这些金属,确保安全回收和环境保护.
科学领域:
- 环境科学与工程环境科学与工程
- 材料科学 材料科学 材料科学
- 废物管理 废物管理
背景情况:
- 通过提取水来去除水溶性化物 (WSC) 是回收城市固体废物焚烧 (MSWI) 飞灰 (FA) 的关键.
- 提取的溶液往往含有超出污水标准的重金属,造成环境风险.
- 有效的重金属稳定对于安全的MSWI FA回收至关重要.
研究的目的:
- 为了研究石矿从水中提取的飞灰溶液中吸附重金属.
- 探索稳定重金属的可行性,通过用水提取的飞灰 (WFA) 合聚石吸附重金属 (PAHMs).
- 为了确保在整个过程中保持WSC清除效率.
主要方法:
- 两个阶段的MSWI飞灰的提取水.
- 沉重金属 (Pb,Cd,Cr,Cu,Zn) 的吸附,在提取的溶液中使用不同量的平石.
- 用WFA长时间填充PAHM.
- 使用毒性特征出程序 (TCLP) 和顺序提取进行分析.
主要成果:
- 每100毫升溶液中3克平石去除了99.7%的重金属 (Pb,Cd,Cr,Cu,Zn),以满足废水标准.
- WSC的去除效率没有受到影响,其中98.44%没有被吸收.
- 复合导致混合粉中重金属分布>99.44%.
- TCLP度符合监管标准,重金属主要以稳定的分数.
结论:
- 帕利戈尔斯基特有效地去除和稳定MSWI飞灰液中的重金属.
- 用WFA填充PAHM可以确保重金属固定,满足监管标准.
- 这种综合方法可以防止二次污染,使MSWI飞灰的安全回收成为可能.
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