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选择性回收银的thiuram二硫化物修饰纤维素

Shunsuke Taka¹, Keisuke Nakakubo², Yuma Ito¹

¹Graduate School of Natural Science and Technology, Kanazawa University Kakuma Kanazawa Ishikawa 920-1192 Japan.

|February 26, 2026

概括

一种新型的纤维素吸附剂改用硫化硫胺 (TDMC) 有效地从水中恢复银离子 (Ag(i)). 这种材料显示出对银的特殊选择性,即使存在高度的其他金属.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
分析化学分析化学

背景情况:

水溶液中的银离子 (Ag(i)) 污染对环境和健康构成风险.
有效和有选择的白银回收方法对于环境修复和资源管理至关重要.

研究的目的:

开发一种高度选择性的吸附剂,用于从水溶液中回收银离子.
研究开发的吸附剂的吸附能力,选择性和机制.

主要方法:

硫化硫胺修饰纤维素 (TDMC) 吸附剂的合成.
批量吸附实验用于评估在各种条件下 (pH,竞争离子) 的性能.
使用X射线光电子谱学 (XPS) 和快速原子轰炸质谱学 (FAB-MS) 进行了表征.

主要成果:

在pH 1.0.0下,TDMC的最大吸附能力为3.61 mmol g-1的Ag.
观察到Ag的异常选择性,即使在具有2000倍以上的竞争金属离子度的情况下,吸附率为99.0%.
已证实吸附的Ag{i) 通过Ag-S协调与uram二硫化基中的硫原子结合.

结论:

TDMC是一种高效和选择性的吸附剂,用于银离子回收.
特定的Ag-S协调机制可以有效捕获银离子.
这种吸附剂提供了一种简单而有效的方法,用于从污染水中回收银.

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