优化了用改性污泥生物炭的一步性热解合成,用于从水中提升 perfluorooctane 硫酸盐的去除
Muzi Li1, Ranbin Liu1, Xiaodi Hao1
1Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education/Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies, Beijing University of Civil Engineering & Architecture, Beijing, 100044, PR China.
一种新的改性污泥生物炭有效地从水中去除像PFOS这样的持久有机污染物. 这种废物转化为财富的战略为环境整治和污泥处理提供了可持续的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
背景情况:
- perfluorooctane 硫酸盐 (PFOS) 构成全球环境和健康风险.
- 污水污泥的处置是一个重要的废物管理挑战.
- 开发有效的PFOS整治和可持续的污泥利用是至关重要的.
研究的目的:
- 开发一种新的改性污泥生物炭 (Zn/SBC),以有效地去除PFOS.
- 为了应对PFOS污染和污水污泥处理的双重挑战.
- 研究开发的吸附剂的吸附机制和稳定性.
主要方法:
- 用ZnCl2作为激活剂的污水污泥的一步热解.作为激活剂.
- 生物炭性质的表征,包括特定表面积和多孔性.
- 在各种条件下的PFOS吸附实验 (pH,竞争离子,湿酸).
- 循环吸附-脱附试验用于评估材料稳定性.
主要成果:
- /SBC的特定表面积增加了50倍 (261.33 m2/g).
- 优化的26%Zn/SBC实现了高的PFOS吸附能力 (60.14 mg/g) 和>99%的去除效率.
- 吸附剂在5个循环中表现出极好的稳定性和可重复使用性.
- PFOS吸附涉及静电吸引,表面复合,π-阴离子相互作用和疏水效应.
结论:
- Zn/SBC是一种高性能,低成本的吸附剂,用于PFOS整治.
- 该研究提出了一种可持续的"废物致富"方法,用于管理污泥和去除污染物.
- 这种方法提供了一个有希望的途径,用于成本效益高的和多基物质 (PFAS) 的去除.
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