在水溶液中的石墨碳化物上有效吸附亚染料酸红色
1College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, People's Republic of China.
ACS omega
|July 8, 2024
概括
胺基石墨碳化物 (M-g-C3N4) 显示了酸红染料的吸附能力创纪录,特别是在低pH下. 基于尿素的石墨碳化物 (U-g-C3N4) 是可回收的,这表明了广泛的工业潜力.
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:
- 石墨碳化物 (g-C3N4) 是消除污染物的有希望的材料.
- 废水中的染料污染给环境带来了重大挑战.
- 开发高效和可回收的吸附剂对于净化水非常重要.
研究的目的:
- 合成和比较两种类型的g-C3N4 (尿素基和胺基) 用于酸红 (ABR) 染料吸附.
- 为了研究溶液pH对吸附性能的影响.
- 评估吸附剂的吸附动力学,同热量,热力学和可回收性.
主要方法:
- 尿素和胺的直接化合成U-g-C3N4和M-g-C3N4.
- 吸附实验是在不同pH值的水溶液中进行的.
- 使用伪二次动力学和兰木尔异热模型分析吸附数据.
- 使用乙醇进行再生研究.
主要成果:
- 无论是U-g-C3N4还是M-g-C3N4,都显示了随着pH值的下降而增加的吸附能力.
- 在pH1.0下,M-g-C3N4实现了25635.64毫克g-1的ABR吸附能力,在pH1.0下达到创纪录的吸附能力.
- 吸附遵循伪二次动力学和兰木尔异热模型,表明自发和外热过程.
- 在与乙醇再生后,U-g-C3N4显示出出色的可回收性.
结论:
- 在ABR移除方面,M-g-C3N4表现出了卓越的性能,创造了新的基准.
- 吸附机制涉及质子化g-C3N4和阳离子ABR之间的静电吸引.
- U-g-C3N4的可回收性凸显了其在废水处理中可持续的工业应用的潜力.
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