预测吸附剂的全尺度性能,以吸附多基和多基物质:小规模快速列测试的作用
Tihitna G Mulugeta1, Mahmut S Ersan1, Sergi Garcia-Segura2
1Department of Civil Engineering, University of North Dakota, Grand Forks, ND 58201, USA.
The Science of the total environment
|March 28, 2025
概括
快速小规模列式试验 (RSSCTs) 有效地评估吸附剂去除持久性per-和多基基物质 (PFAS). 基于树脂的吸附剂表现出优越的性能,但水的吸附剂表现出优越的性能.
科学领域:
- 环境科学 环境科学
- 水处理技术水处理技术
- 吸附科学 吸附科学
背景情况:
- 和多基基物质 (PFAS) 是持久性环境污染物,具有重大健康问题.
- 有效的清除策略对于减轻PFAS污染至关重要.
- 快速小规模列测试 (RSSCTs) 是评估吸附剂性能的一种具有成本效益的方法.
研究的目的:
- 通过RSSCT通过树脂和碳基吸附剂审查PFAS的去除.
- 分析PFAS突破曲线模型和吸附相互作用.
- 评估影响RSSCT中PFAS吸附的因素,并确定研究缺口.
主要方法:
- 对使用快速小规模列测试 (RSSCTs) 进行PFAS清除的研究的文献综述.
- 分析PFAS属性 (链长,功能组) 和它们对吸附的影响.
- 基于树脂和基于碳的吸附剂性能的比较.
- 对缩放方法的评估 (比例扩散率与比例扩散率对比. 对于RSSCTs来说,它们具有常量扩散率 (Constant Diffusivity).
主要成果:
- PFAS链长度和头部功能组显著影响突破时间;较短的链和碳酸盐更早地突破.
- 基于树脂的吸附剂通常优于基于碳的吸附剂,处理更多的床体积.
- 水中有机物质的存在对PFAS吸附有不利影响,加速突破.
- 恒定扩散度 (CD) -RSSCTs的缩放与试点规模的结果更好地协调,而不是比例扩散度 (PD) -RSSCTs.
结论:
- RSSCT实验设计和解释需要仔细考虑多个因素,以准确评估PFAS的去除.
- 了解PFAS-吸附剂相互作用和水矩阵的影响对于有效的吸附剂选择和应用至关重要.
- 需要进一步的研究来解决PFAS在固定床柱流程中被吸附剂吸附的挑战.
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