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来自煤炭飞灰的氨基/醇功能化,用于Cu2+的去除

Jiale Bai¹, Yuanrong Yi², Xinyue Chang¹

¹College of Ecology and Environment, Xinjiang University, Urumqi, 830046, China.

Environmental research

|November 8, 2025

概括

从煤炭飞灰中获得的新型功能化中性 (MS) 材料有效地去除重金属铜离子 (Cu2+). 醇功能化MS-SH具有优越的吸附能力,为水处理提供可持续的解决方案.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
纳米技术纳米技术

背景情况:

由于其持久性和生物积累,重金属铜 (Cu2+) 的污染对生态和健康构成重大风险.
开发具有成本效益和高效的吸附材料对于控制水中的重金属污染至关重要.
煤炭飞灰 (CFA) 是一个丰富的工业废物,有可能被利用成功能吸附剂.

研究的目的:

为了合成和表征新型中性二氧化 (MS) 材料功能化与氨基 (MS-NH₂) 和硫醇 (MS-SH) 组从煤炭飞灰.
评估这些功能化MS材料的吸附性能,以从水溶液中去除Cu2+.
研究开发材料的吸附机制和理论上的最大吸附能力.

主要方法:

从煤炭飞灰 (CFA) 合成的半孔性二氧化 (MS) 使用sol-gel,烧结和酸方法.
用3-aminopropyltriethoxysilane (APTES) 和 (3-mercaptopropyl) trimethoxysilane (KH-590) 进行MS的化学移植,以产生MS-NH₂和MS-SH.
吸附实验以确定剂量,pH,度和接触时间的影响;使用FT-IR,XPS,SEM-EDS和BET进行表征;动力和异热模型.

主要成果:

在功能化之后,MS的Si-O-Si框架仍然完好无损.
优化的MS-SH实现了58.25毫克/克的Cu2+吸附能力,优于MS-NH2 (38.05毫克/克).
吸附遵循伪二次动力学和弗洛伊德利希异热模型,MS-SH的理论最大容量为120.07 mg/g,MS-NH的理论最大容量为93.01 mg/g.

结论:

从煤炭飞灰中提取的功能化半孔二氧化是Cu2+去除的有效吸附剂.
由于协同复合,静电吸附和离子交换机制,MS-SH表现出优越的吸附性能.
这项研究为利用煤炭飞灰在重金属修复中提供了新材料和理论见解.

关键词:

氨基氨基功能化的功能化.重金属是一种重金属.默卡普托的功能化功能化半孔的二氧化.

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