沉积物中的内源和通过复合水净化污泥碳水化合物的不移
Ying Liu1, Liwenze He2, Yu Chen1
1Faculty of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu, People's Republic of China.
Environmental technology
|March 27, 2025
概括
一种新的复合材料有效地从水中沉积物中去除和. 这种过氧化/加载的化 (CaO2-LaHyd) 为沉积物修复提供了一种双作用溶液.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 水生生态学 水生生态学
背景情况:
- 沉积物充当 (P) 和重金属等污染物的沉降池.
- 现有的沉积物修复策略通常针对单一污染物,限制其有效性.
- 开发用于同时去除污染物的复合材料对于水生生态系统的健康至关重要.
研究的目的:
- 为了合成和评估一种新型复合材料,即过氧化物/满载的 (CaO2-LaHyd),用于同时从沉积物中去除P和 (Pb).
- 研究CaO2-LaHyd在模拟沉积物封闭中的吸附机制和被动化效应.
主要方法:
- 水热碳化水净化污泥,以制造水电.
- 连续加载离子和纳米过氧化物到化物上.
- 吸附实验以确定P和Pb吸收能力.
- 沉积物封闭模拟以评估污染物的释放和转化.
- 使用SEM,XPS,XRD和EDS进行材料表征.
主要成果:
- CaO2-LaHyd的吸附能力很高:P的吸附能力为66.05 mg·g-1;Pb的吸附能力为230.41 mg·g-1.
- 5%的CaO2-LaHyd添加剂在沉积物封顶过程中显著降低了沉积物上层水中的酸盐.
- 过氧化改善了沉积物的氧化还原条件,抑制了内源性P释放,并降低了间歇性P.
- 该材料促进了P的转化为稳定的形式,并减少了可生物利用的P分量.
- CaO2-LaHyd有效地被动化了Pb,减轻了泄漏风险.
结论:
- CaO2-LaHyd是一种有前途的复合材料,可以同时修复水中沉积物中的和.
- 该材料的有效性源于其吸附能力和和过氧化的协同作用.
- 这种方法为改善水质和减轻与污染沉积物相关的风险提供了可持续的解决方案.
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