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增强Cd的保留 (II) 通过脱皮的丁石及其甲索基形式:固体和能量研究

Mostafa R Abukhadra^1,2, Nourhan Nasser^1,2, Ahmed M El-Sherbeeny³

¹Geology Department, Faculty of Science, Beni-Suef University, Beni Suef City 62511, Egypt.

|March 18, 2024

概括

甲醇处理的除皮本 (Mth/EXBEN) 显著增强了 (Cd(II)) 离子的去除,达到363.7 mg/g. 这种修改后的托尼特为重金属整治提供了更好的吸附能力和效率.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学化学化学

背景情况:

重金属污染,特别是来自 (Cd) 离子的污染,对环境和健康构成重大风险.
托尼特粘土及其改性形式正在被探索,因为它们有可能从水溶液中吸附有毒金属离子.
了解本托尼特的转化过程对于优化其吸附能力至关重要.

研究的目的:

评估除皮本 (EXBEN) 和其甲醇混合衍生物 (Mth/EXBEN) 的Cd(II) 离子保留潜力.
调查脱皮和甲醇杂化对本托尼特吸附特性的影响.
分析控制Cd (II) 吸附的固体和能量方面在修饰的顿石上.

主要方法:

吸附实验使用原始顿石 (BEN),剥皮顿石 (EXBEN) 和甲醇混合剥皮顿石 (Mth/EXBEN) 进行.
使用了先进的平衡模拟,特别是使用单一能量级别的单层模型.
立体分析确定了保留点密度 (Nm),能量调查计算了高斯和吸附能.

主要成果:

与EXBEN (293.2 mg/g) 和BEN (187.3 mg/g) 相比,Mth/EXBEN的Cd (II) 吸附能力高于363.7 mg/g,而EXBEN的Cd (II) 吸附能力高于363.7 mg/g.
脱皮和甲醇修饰显著增加了活性吸附点的密度.
精力研究表明,通过双极结合和结合,通过外热和自发吸附到Mth/EXBEN.对Cd的物理封存.

结论:

甲醇杂化可大大提高剥皮本托尼特的Cd (II) 去除效率.
改性土矿 (Mth/EXBEN) 显示出高容量和有利的吸附特性,可用于Cd (II) 修复.
这项研究证实了Mth/EXBEN.的Cd (II) 保留的物理吸附机制和自发性质.

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