生物粉末的使用作为潜在的有毒元素在水溶液中存在的吸附剂
Vanesa Santás-Miguel1,2,3, Vanesa Lalín-Pousa1,2, Manuel Conde-Cid1,2
1Department of Plant Biology and Soil Science, Area of Soil Science and Agricultural Chemistry, Faculty of Sciences, University of Vigo, 32004 Ourense, Spain.
Materials (Basel, Switzerland)
|February 13, 2025
概括
软木和松树皮有效地从水中去除,,化物和等有毒元素. 这些天然材料具有较高的吸附率和较低的脱吸率,表明它们在可持续水处理方面的潜力.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
背景情况:
- (P), (As), (F) 和 (Cr) 等潜在有毒元素 (PTE) 污染水溶液.
- 传统的水处理方法可能是昂贵的,并产生二次污染.
- 具有多孔结构和活性功能组的绿色材料为污染物清除提供了可持续的替代方案.
研究的目的:
- 研究软木皮 (CB) 和松皮 (PB) 在水溶液中对PTE的吸附和脱吸能力.
- 评估污染物度和pH对CB和PB的去除效率的影响.
- 评估CB和PB作为环境友好的水处理生物吸收剂的潜力.
主要方法:
- 使用不同度的P,As,F和Cr (0.01-10毫米) 和pH水平 (3.5-12) 进行了吸附和脱附实验.
- 吸附异温模型 (Freundlich和Langmuir) 用于分析吸附行为.
- 进行了溶解试验,以确定生物吸收剂的保留能力.
主要成果:
- 软木皮 (CB) 对 As 和 F 的吸附性更高,而松皮 (PB) 对 P 和 Cr 的吸附性更高.
- 吸附遵循弗洛伊德利希和兰格穆尔模型,表明表面异质性和多层吸附.
- 观察到低的脱吸率:CB保留高达99%的F和85%的As;PB保留高达86%的Cr和70%的P.
- 酸性pH增强了Cr吸附,而pH对As,P和F的去除影响很小.
结论:
- CB和PB生物粉是有效和环保的生物吸收剂,用于从水中去除PTE.
- 这些生物吸收剂的效率是特定于污染物的.
- 这些天然材料对可持续的水处理和土壤修复应用具有重大前景.
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