Department of Environmental Sciences, Fatima Jinnah Women University, Rawalpindi, 46000, Pakistan.
Department of Environmental Sciences, Fatima Jinnah Women University, Rawalpindi, 46000, Pakistan.
Chemosphere. 2023 Oct;339:139717. doi: 10.1016/j.chemosphere.2023.139717. Epub 2023 Aug 2.
Access to clean water is the mandatory requirement for every living being to sustain life. So, membrane-based integrated approach of adsorption and separation technology has recently been preferred by scientists over other conventional techniques, for wastewater treatment. Current research focused on the synthesis of novel imidazolium (A1) based IL, which was further functionalized with hydroxyapatite (HAp; extracted from Labeo rohita scales), to create possible solutions towards environmental remediation. Cellulose acetate (CA) was used for the fabrication of three different ionic liquid membranes. All the synthesized products were characterized by FTIR, XRD and TGA. Two dyes of different nature, i.e., congo red (anionic) and crystal violet (cationic) were selected because of their highly toxic and carcinogenic effects, for batch adsorption experiments. Antibacterial activity of the synthesized membranes was also evaluated against S. aureus. Results of the study revealed that CA-HA1 1:2 acted as the best adsorbent towards the removal of crystal violet, exhibiting removal efficiency of 98% with the contact time of 24 h while in case of congo red adsorption, CA-HA1 (1:2) proved as prime adsorbent with the removal efficiency of 96% for the same preceding contact time. Considering the antibacterial character of the synthesized membranes, CA-A1 (1:1) emerged as very efficient antibacterial agent with the inhibition zone of 50 mm after 48 h. The overall behavior of monolayer and multilayer adsorption was witnessed for both dyes while kinetic studies favored the pseudo-second order reaction for all adsorbents.
获取清洁水是维持生命的每一种生物的强制性要求。因此，与其他传统技术相比，科学家们最近更喜欢基于膜的吸附和分离技术的综合方法来处理废水。目前的研究集中在合成新型的咪唑鎓（A1）基离子液体，进一步用羟基磷灰石（从罗非鱼鳞片中提取）进行功能化，以创造环境修复的可能解决方案。醋酸纤维素（CA）用于制造三种不同的离子液体膜。所有合成的产物都通过 FTIR、XRD 和 TGA 进行了表征。选择了两种性质不同的染料，即刚果红（阴离子）和结晶紫（阳离子），因为它们具有高度毒性和致癌作用，用于批量吸附实验。还评估了合成膜对金黄色葡萄球菌的抗菌活性。研究结果表明，CA-HA1 1:2 是去除结晶紫的最佳吸附剂，在 24 小时的接触时间内去除效率达到 98%，而在刚果红吸附的情况下，CA-HA1（1:2）则是最佳吸附剂，去除效率为 96%，接触时间相同。考虑到合成膜的抗菌特性，CA-A1（1:1）在 48 小时后表现出非常有效的抗菌剂，抑菌圈为 50mm。两种染料都表现出单层和多层吸附的整体行为，而动力学研究则有利于所有吸附剂的伪二级反应。
