用奇托桑接种的聚合Fe柱状土:有效地从废水中去除Cd和As
Ruize Jia1, Ronghao Man2, Liannan Shang3
1School of Architecture and Engineering, Xinjiang University, Urumqi, 830017, China; MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China.
Environmental research
|September 14, 2025
概括
一种新型的酸盐植入的Fe柱状土 (CS@Fe@Bt) 有效地从采矿废水中去除 (Cd) 和 (As). 这种可持续吸附剂提供了高容量和多种去除机制,用于共同污染的水处理.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 采矿和工业活动会产生污染有毒重金属的废水,如 (Cd) 和 (As).
- 同时去除阴离子 (Cd) 和阴离子 (As) 污染物在废水处理中是一个重大挑战.
- 需要可持续的,低成本的吸附剂,能够有效地处理复杂的工业废水.
研究的目的:
- 为了合成和表征酸盐移植的Fe柱状丁 (CS@Fe@Bt) 作为共污染的Cd和As废水的吸附剂.
- 为了评估CS@Fe@Bt的吸附性能,动力学和同热量,用于Cd(II) 和As(III).
- 阐明CS@Fe@Bt在处理Cd和As共污染水中的主要吸附机制.
主要方法:
- 通过Fe-pillaring和随后的用奇多接种来修改天然顿石,以创建CS@Fe@Bt.
- 进行了吸附实验,以确定pH,动力学和异热的作用.
- 分析吸附剂的特性和吸附机制,包括氧化As(III) 到As(V) 的特征化技术.
主要成果:
- 铁支柱显著增加了本托尼特的特定表面积和孔积,增强了酸盐负荷.
- CS@Fe@Bt在6-8的pH范围内显示出对Cd(II) (80.79毫克g−1) 和As(III) (34.90毫克g−1) 的高吸附能力.
- 吸附跟随伪二阶动力学,表明多层异质表面相互作用.
- 关键的去除机制包括氧化 (III) 到 (V),静电相互作用和复合物形成.
结论:
- CS@Fe@Bt是一种高效且稳定的吸附剂,可同时从废水中去除Cd (II) 和As (III).
- 该材料增强的结构性质和多种吸附机制有助于其卓越的性能.
- 这项研究提供了一个有前途的技术解决方案,用于处理矿业污染和的废水.
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