Department of Environmental Sciences, Fatima Jinnah Women University, Rawalpindi, Pakistan.
Pakistan Institute of Nuclear Science and Technology, Nilore, Pakistan.
Environ Sci Pollut Res Int. 2019 Jun;26(16):15795-15802. doi: 10.1007/s11356-019-04681-6. Epub 2019 Apr 13.
Insecticide spray in fruit gardens is a very common practice in different districts of Pakistan. These toxic sprays not only deteriorate the taste of fruit but also due to wet deposition travel through soil, they reach groundwater via leaching process. In the present study, imidazolium-based ionic liquid ([Cim][CHNH]Br) and its cellulose acetate-supported membrane ([CA-Cim][CHNH]Br) was prepared and characterized using FTIR, XRD, and SEM. These materials are used as adsorbents for the removal of "Pirimicarb" (an insecticide from waste water). A closed batch at varying parameters, i.e., concentration and temperature as function of time, was conducted on UV-Vis spectrophotometer. Comparison of removal capacity exposed better (74%) adsorption trend by CA-IL membrane than ionic liquid (68%). Thermodynamic studies projected spontaneous process (-ΔG), favoring endothermic reaction (ΔH, ΔS). Kinetics supported pseudo-second order reaction while fitness of isothermic models (Langmuir, Freundlich, Temkin) proposed multistep intraparticle diffusion process.
在巴基斯坦不同地区，果园杀虫剂喷雾是一种非常普遍的做法。这些有毒喷雾不仅会恶化水果的味道，而且由于湿沉积通过土壤传播，它们会通过淋溶过程到达地下水。在本研究中，制备并表征了基于咪唑鎓的离子液体([Cim][CHNH]Br)及其纤维素醋酸酯支撑膜([CA-Cim][CHNH]Br)，使用 FTIR、XRD 和 SEM。这些材料被用作从废水中去除“pirimicarb”(一种杀虫剂)的吸附剂。在紫外可见分光光度计上进行了一系列不同参数(即浓度和温度随时间的变化)的封闭批实验。去除能力的比较表明，CA-IL 膜的吸附趋势较好(74%)，而离子液体为(68%)。热力学研究预测了自发过程(-ΔG)，有利于吸热反应(ΔH，ΔS)。动力学支持准二级反应，而等温模型的拟合情况(Langmuir、Freundlich、Temkin)提出了多步内扩散过程。
