在土壤中,EK-PRB应用对Cd"聚焦"效应的影响:PRB应用,活性碳的替代和极性交换
Sheng Li1, Guihong Lan1, Qiao Sun2
1College of Chemistry and Chemical Engineering, Southwest Petroleum University (SWPU), Chengdu, People's Republic of China.
Environmental technology
|March 27, 2025
概括
这项研究优化了使用活性碳可通反应屏障 (PRBs) 的电动力学 (EK) 补救,以减轻电动阻.
科学领域:
- 环境科学 环境科学
- 土壤修复土壤的修复.
- 电动力学过程 电动力学过程
背景情况:
- 重金属污染,特别是 (Cd),对环境构成重大风险.
- 电动力学 (EK) 整治是一种有前途的土壤清理技术.
- 在EK整治中的"聚焦"效应会影响污染物分布和去除效率.
研究的目的:
- 为了研究充满活性碳的透反应屏障 (PRBs) 在Cd污染土壤的EK整治过程中对"聚焦"效应的影响.
- 为了优化PRB布局,活性碳替换频率和极性交换策略,以提高Cd去除.
- 为了评估优化EK-PRB系统的能源效率.
主要方法:
- 在9天内进行了5次电动力学 (EK) 实验.
- 优化了充满活性炭的PRB的放置.
- 实施定期更换活性碳和极性交换策略.
- 在土壤样本中分析了Cd度和分数分布.
主要成果:
- 在EK3实验中,使用PRB放置和实验中部活性碳替换,有效地减轻和转移了Cd"聚焦"效应.
- 达到最大的平均Cd去除效率为31.66%.
- 在积累区 (S3,S5) 中降低危险Cd分数 (可交换,可减少),在清理区 (S1,S2,S4) 中增加不太危险的分数 (可氧化,残留).
- 与对照组 (EK0) 相比,证明了大约31.88%的潜在节能.
结论:
- 结合EK和活性炭PRB的方法有效地管理了"聚焦"效应并增强了Cd修复.
- 优化策略为改善重金属土壤整治效率和减少能源消耗提供了实际解决方案.
- 为开发可持续和具有成本效益的土壤整治技术提供了宝贵的见解.
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