探索表面和水性复合体与地下水酸盐和酸盐吸附的干扰机制
Shan Hu1,2, Jingyi Fu3,4, Shenmin Zhou3,4
1Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, 570228, China. hushan2000@126.com.
Environmental science and pollution research international
|January 5, 2024
概括
(Ca2+) 通过形成复合物来增强的去除,与 (Mg2+) 不同. 二碳酸盐 (HCO-III) 干扰了这个过程,特别是,影响了地下水处理的有效性.
科学领域:
- 环境化学环境化学
- 水处理技术 水处理技术
- 地质化学 地质化学
背景情况:
- 地质性 (As) 在地下水中的污染是一个全球性的问题.
- 常见的共存离子如 (Ca2+), (Mg2+) 和碳酸盐 (HCO3-) 影响的去除,但它们的不同作用仍然不清楚.
- 了解这些相互作用对于预测和优化吸附效率至关重要.
研究的目的:
- 阐明Ca2+,Mg2+和HCO3对吸附的分子级干扰机制.
- 为了区分Ca2+和Mg2+对固定的影响.
- 为了研究金属水性复合物的吸附作用.
主要方法:
- 进行了批量和列过试验.
- 使用光谱技术来分析相互作用.
- 在各种离子条件下量化了 (V) 和 (III) 的吸附效率.
主要成果:
- Ca2+通过形成三元Ca-As-TiO2复合体,显著增强了As (V) 和As (III) 的吸附.
- 2+只对去除产生了轻微的积极影响.
- HCO3-通过防止三元复合物的形成来抑制As(III) 的去除,但没有影响As(V) 的吸附.
- 观察到一种水性Ca-As(V) 复合物,促进了表面复合和吸附.
结论:
- 在通过表面复合增强吸附方面,Ca2+起着至关重要的作用,而Mg2+的影响有限.
- 存在的HCO3-有不同的影响去除As (V) 和As (III),显著减少As (III) 消除.
- 这些发现对于预测实际地下水处理场景中的吸附性能至关重要.
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