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用改性废弃物飞灰去色多元染料污水:对染料的阳离子和阴离子组合进行参数分析

Namrah Akhtar¹, Zaheer Aslam², Reyad A Shawabkeh³

¹Department of Chemical Engineering, University of Engineering and Technology, Lahore, 54890, Pakistan.

Environmental science and pollution research international

|May 30, 2023

概括

改性废物飞灰有效地从废水中去除甲基蓝和罗达胺6G等阴阳性染料. 这种可持续的吸附剂显示出高效率和染料处理能力.

科学领域:

环境化学环境化学
材料科学材料科学材料科学
水处理处理水的方法

背景情况:

工业废弃物飞灰 (WFA) 是一个处置挑战.
可以修改WFA以创建功能性吸附剂.
染料污染的废水需要有效和可持续的处理解决方案.

研究的目的:

为了研究酸激活和氨基功能废弃物飞灰 (WFA) 作为从废水中去除阴离子和阴离子染料的吸附剂的有效性.
在各种条件下评估吸附性能,并了解混合染料溶液中的相互作用效应.
为了确定修改后的WFA的吸附动力学,热力学和容量.

主要方法:

废物飞灰 (WFA) 用酸和氨溶液进行处理,以使氨基功能化.
修改后的WFA被用于从水溶液中吸附甲基蓝 (MB),罗达胺6G (Rh) 和甲基色 (MO) 染料.
在不同的条件下进行了吸附实验,并使用动态和异温模型 (分数顺序动态,扩展Sips模型) 分析了数据.

主要成果:

修改后的WFA显示了MB (~100%) 和Rh (~82%) 的高去除效率,但MO (~20%) 的效率较低.
对二进制阴阳性染料观察到对抗效应,而混合阴阳性-阴阳性染料则出现协同效应.
发现单层吸附能力为MB的24.93毫克/克,Rh的24.83毫克/克,MO的14.95毫克/克.
与Langmuir和Freundlich模型相比,扩展的Sips模型提供了更好的适配 (R2 = 0.99).

结论:

酸活性和氨基功能化废弃物飞灰是处理染料污染废水的有希望的吸附剂.
吸附过程通常是自发的和内热的,除了特定染料组合的例外.
改性WFA为工业染料去除应用提供了可持续和有效的解决方案.

关键词:

亚染料是使用亚染料的.二元吸附方式二元吸附方式废弃物飞灰是废弃物的飞灰.废水是废水,废水就是废水.

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