热解参数对来自污水污泥的生物炭的影响,包括重金属的环境风险评估
Dorota Makowska1, Manikandan Pandiyan2, Katarzyna Kapusta1
1Department of Fuels Technology, Faculty of Energy and Fuels, AGH University of Krakow, 30-059 Krakow, Poland.
Journal of environmental management
|November 7, 2025
概括
污水污泥的热解产生生物炭,温度和停留时间对其质量产生重大影响. 较高的温度 (>600°C) 增强了土壤的修复特性,使重金属不动,减少了环境风险.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
背景情况:
- 污水污泥管理是一个全球性的挑战.
- 热解为污泥处理和生物炭生产提供了一个可持续的解决方案.
- 生物炭的特性受到热解条件的影响.
研究的目的:
- 研究热解参数对污水污泥衍生生物炭性质的影响.
- 优化生物炭特性,用于土壤整治和重金属固定.
主要方法:
- 系统地调查热解温度 (200-800°C),停留时间 (5-60分钟) 和惰性气体流速.
- 综合生物炭表征:终极,近距离,元素,分子分析,酸度,表面积,孔径大小.
- 在污泥和生物炭中进行重金属评估.
主要成果:
- 温度和停留时间显著影响了生物炭质量;气体流速的影响最小.
- 高温 (>500°C) 增加了pH,灰和营养含量.
- 温度>600°C增加了表面积,减少了孔径,降低了H/C比 (<0.57).
- 热解挥发了As和Cd;在700°C时,Cd的去除超过了90%.
- 重金属固定降低了环境风险从高 (PERI=1158) 到低 (PERI<50) 在>600°C.
结论:
- 热解对于污水污泥管理和生产土壤修复生物炭是有效的.
- 优化的热解条件增强了生物炭的环境效益.
- 数据指导通过热解进行可持续的污泥管理.
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