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通过优化准备协议,增强对和的层叠双氧化物基磁性生物炭的吸收

Peng Lyu¹, Lianfang Li¹, Jinli Huang²

¹Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.

Bioresource technology

|September 11, 2023

概括

通过制备协议优化基于层状双氧化物 (LDH) 的磁性生物炭 (LMBC) 提高了重金属的去除. 较高的LDH负载和热解温度显著提高了As (III) 和Cd (II) 的吸附能力.

科学领域:

环境化学环境化学
材料科学材料科学材料科学
吸附科学吸附科学

背景情况:

修改生物炭在去除污染物的有效性受制备方法的影响.
基于层状双氧化物 (LDH) 的磁性生物炭 (LMBC) 显示出吸附重金属的前景.
了解LMBC准备和性能之间的关系对于优化其应用至关重要.

研究的目的:

调查不同的制备方案如何影响LMBCs的特性和性能.
探索LMBCs对 (III) ( (III)) 和 (II) (Cd (II)) 的吸附特性.
建立LMBC在重金属修复中的性能特征关系.

主要方法:

用不同的LDH加载率 (LLR),热解温度和生物质来源制备LMBC.
描述LMBC属性,包括特定表面积 (SSA) 和功能组.
吸附实验量化了As (III) 和Cd (II) 的去除效率.

主要成果:

增加的LLR和热解温度显著提高了LMBC吸附能力.
在最佳条件下 (2:1LLR,800°C热解) 的吸附率是低于最佳条件 (0.5:1LLR,400°C) 的两倍以上.
竹子衍生LMBCs由于更高的SSA和纳米-LDH载荷能力而表现出优越的性能.

结论:

制备方案,包括LLR,热解温度和生物质来源,对重金属去除LMBC的性能产生重大影响.
吸附机制涉及通过金属矿物和含金属组的共同沉和复合.
这项研究为定制生物炭改造提供了一个框架,以改善多种重金属的去除.

关键词:

作为 (III) 和 (II) 的Cd.修改后的生物碳绩效与表征的关系是指性能与表征的关系.准备方案准备方案准备方案吸附吸附方式吸附吸附方式

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