化物从突岩中化,并通过天然和商业吸附剂去除化物
Takahiko Arima1, Nohara Yokobori2, Walubita Mufalo1
1Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Japan.
Chemosphere
|March 18, 2024
概括
从道施工中挖掘出来的岩石中的化物可以使用吸附层来管理. 天然材料S-1和S-4以及吸附剂显示出高除的潜力.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
背景情况:
- 在日本道建设中从挖掘岩石中出的化物 (F-) 通常超过环境标准 (0.8 mg/L).
- 有效的处置方法对于处理含有F的建筑垃圾至关重要.
- 吸附层系统为F-封装和材料回收提供了一个循环经济解决方案.
研究的目的:
- 为了确定合适的吸附材料,用于北海道道施工中的F-带的陶.
- 评估天然地质材料 (S-1至S-4) 和商业吸附剂 (Ca,Mg,CaMg) 的F吸附.
主要方法:
- 进行了批量吸附试验,以评估选定的天然和商业吸附剂的F去除效率.
- 分析了吸附等热体 (Langmuir) 的情况.
- 研究了pH,碳酸盐 (HCO3-),化物 (Cl-) 和硫酸盐 (SO2-) 对吸附的影响. 无形 (Al) 和铁 (Fe) 含量与F-吸附相关.
主要成果:
- 天然吸附剂S-1和S-4显示出高F-吸附能力,遵循Langmuir异温的行为.
- 对自然材料的F-吸附受到pH和HCO3的显著影响,与无形Al和Fe含量有很强的相关性.
- 含 (Mg) 的商业吸附剂显示出最高的F-亲和力,归因于静电相互作用和与Mg (OH) 2的共同沉.
结论:
- 天然地质材料 (S-1,S-4) 和基于Mg的吸附剂对从挖掘岩石中去除F-有希望.
- 吸附机制包括离子交换,静电相互作用和共降.
- 优化吸附层系统需要进一步确定诸如透性和停留时间等参数,以有效地保持F- .
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