从受污染的土壤中提取强化化物,结合化剂和表面活性剂:洞察土壤表面电荷的吸附性控制
Shoji Yoshioka1, Akio Ohta2, Shafiqur Rahman2
1Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan.
Journal of environmental management
|November 24, 2024
概括
一种可生物降解的化剂,HIDS,通过吸附到土壤表面并取代,有效地从土壤中去除化物. 混合HIDS和表面活性剂SDT进一步通过复合和表面吸附增强了化物提取.
科学领域:
- 环境化学环境化学
- 土壤科学 土壤科学
- 整治技术 整治技术
背景情况:
- 传统的土壤清洗剂对环境构成风险.
- 可生物降解的化剂和表面活性剂为有毒元素的修复提供了环保的替代方案.
- 了解提取机制对于优化土壤洗系统至关重要.
研究的目的:
- 评估可生物降解化剂和表面活性剂在污染土壤中化物 (F) 修复的有效性.
- 阐明这些剂的基础提取机制.
- 为了研究一种化剂-表面活性剂混合物的协同效应.
主要方法:
- 使用可生物降解化剂 (HIDS) 和阳离子表面活性剂 (SDT) 的土壤清洗实验.
- 对化物提取效率和矿物溶解的分析.
- 使用泽塔电位和FT-IR测量进行表面表征.
- 优化洗条件 (度,pH,时间).
主要成果:
- HIDS证明了有效的F提取与最小溶解的F含有矿物质 (Ca,Fe,Al).
- 在土壤表面的HIDS吸附会取代F,并产生负面电荷,抑制再吸附.
- 混合HIDS和SDT可以实现最大的F去除 (132mgkg-1),比单独使用HIDS增加22%.
- 针对HIDS-SDT混合物的优化条件包括10 mmol L-1 HIDS,10 mmol L-1 SDT,pH 3和1小时的洗时间.
结论:
- 生物降解化剂HIDS和阳离子表面活性剂SDT对于化土壤修复是有效的.
- HIDS-SDT混合物通过联合复合,酸溶解和表面吸附机制来增强F提取.
- 该过程涉及F的移位,减轻再吸附,并通过表面电荷修改增强提取.
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