基于阴离子废弃物大麻纤维的膜:通过环保工艺去除阴离子污染物的案例研究
Nataša Knežević1, Marija M Vuksanović1, Katarina Banjanac2
1University of Belgrade, "VINČA" Institute of Nuclear Sciences - National Institute of the Republic of Serbia, Mike Petrovića Alasa 12-14, 11351, Belgrade, Serbia.
Journal of environmental management
|November 6, 2024
概括
废弃的麻纤维被转化为一种新型吸附剂CCC-UHM,有效地从水中去除阴离子染料和氧离子. 这种可持续材料具有高吸附能力,可以使用生物催化或光催化方法再生.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 生物技术是生物技术.
背景情况:
- 工业废物,如大麻纤维,面临着处置挑战.
- 废水被离子染料和有毒氧离子污染是一个重大的环境问题.
- 开发具有成本效益和可持续的吸附剂对于环境修复至关重要.
研究的目的:
- 为了将废弃的麻纤维转化为一种有阴性修饰的基纤维素吸附剂 (CCC-UHM).
- 评估CCC-UHM在去除各种阴离子染料和氧离子的效率.
- 探索吸附剂的可持续再生方法,包括生物催化和光催化方法.
主要方法:
- 大麻纤维预处理 (脱/除),然后用化尿素 (CCC-U) 进行四级化.
- 用压力辅助的交联与酸形成CCC-UHM膜.
- 对阳离子染料 (AY36,CR,AG25,AB92) 和氧离子 (As,V,Cr,VI)) 的批量和柱吸附研究.
- 使用SEM,FTIR,拉曼,XPS,XRD和孔隙性分析进行表征.
- 吸附/脱附研究,使用静止的乳糖酶进行脱色和氧化进行光催化降解.
主要成果:
- 在pH 7.0下,合成的CCC-UHM对离子染料 (例如AG25的812.8 mg/g) 和氧离子 (例如AsV的107.9 mg/g)) 具有很高的吸附能力.
- 兰迈尔模型最好地描述了吸附过程,表明了内热和自发平衡.
- 固定拉卡斯为AG25和AB92.9实现了96%的脱色效率.
- 光降解提供了一个低威胁的环境处理选项,并且废气膜的生物降解性证实了该技术的循环性.
结论:
- 废弃的麻纤维可以有效地转化为用于净化水的高性能吸附剂 (CCC-UHM).
- CCC-UHM吸附剂在去除各种污染物方面具有显著的潜力.
- 可持续的再生策略,特别是用固定乳酶进行生物催化,突显了该技术的环保和循环性质.
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