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用化粘土去除 perfluoroalkyl 酸和前体:有效的吸附和增强的再利用

Qianqian Dong¹, Xiaopeng Min¹, Wenxin Zhang¹

¹Department of Civil and Environmental Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, United States.

Journal of hazardous materials

|October 22, 2024

概括

与离子交换器官粘土相比,一种新型的有机粘土 (QAG-ZrMT) 显示出在从水中去除基和多基物质 (PFAS) 的性能和可再生性更好.

科学领域:

环境化学环境化学
材料科学材料科学材料科学
水处理技术水处理技术

背景情况:

有机改性粘土 (有机粘土) 有效地去除和多基物质 (PFAS).
传统的有机粘土缺乏稳定性和可再生性,无法用于实际的PFAS整治.
共价功能化为稳定和可重复使用的吸附剂提供了潜在的解决方案.

研究的目的:

开发和评估一种用于PFAS吸附的新型合功能粘土 (QAG-ZrMT).
为了比较QAG-ZrMT与传统的离子交换器官粘土 (HDTMA-ZrMT) 的性能.
评估开发的吸附剂的可再生性和可重复使用性.

主要方法:

通过共价结合将支柱状的粘土基板与有机纤维素接合,以创建QAG-ZrMT.
合成离子交换器官粘土 (HDTMA-ZrMT) 进行比较分析.
测试 perfluorooctanoic 酸 (PFOA), perfluorooctanesulfonic 酸 (PFOS), 5:3 甲醇碳酸 (5:3FTCA) 和 6:2 甲醇硫酸 (6:2FTS) 的吸附.
在多个循环中评估吸附剂的再生和性能.

主要成果:

QAG-ZrMT表现出增强的吸附性,特别是对于像5:3FTCA这样的不太水的PFAS,这是由于更强的静电相互作用.
在多个再生周期中,QAG-ZrMT表现出强大的性能.
由于有机组损失,HDTMA-ZrMT在再生后失去了显著的PFAS去除能力.

结论:

共振接种为有机粘土吸附剂提供了传统离子交换的稳定和可再生的替代方案.
QAG-ZrMT是一种有前途的材料,可有效和可持续地对PFAS污染水进行整治.
这些发现指导了先进吸附剂的设计,以应对持久有机污染物.

关键词:

吸附方式吸附方式吸附方式有机粘土是有机粘土.在PFAS中,我们可以使用PFAS.再生再生再生的过程处理水处理水处理水处理

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