Faculty of Chemical & Petroleum Engineering, University of Tabriz, Tabriz 5166616471, Iran.
Faculty of Chemical & Petroleum Engineering, University of Tabriz, Tabriz 5166616471, Iran.
Int J Biol Macromol. 2021 Oct 31;189:432-442. doi: 10.1016/j.ijbiomac.2021.08.144. Epub 2021 Aug 24.
A new magnetic nanocomposite clinoptilolite (CLT)/Starch/CoFeO was synthesized using co-precipitation method. The prepared magnetic composite powder was utilized for decontamination of methylene blue dye (MBD), methyl violet dye (MVD), and crystal violet dye (CVD) from water media. The BET analysis showed that CLT modification using starch and CoFeO nanoparticles improved its specific surface and the amount of specific surface area for CLT, CoFeO and CLT/Starch/CoFeO powder was reported to be 18.82 m.g, 151.4 m.g and 104.75 m.g, respectively. Experimental results showed that pH 9 had a vital role in the adsorption process of all three types. Langmuir and Redlich-Petersen isotherm models were well fitted with experimental data. Also, the maximum adsorption capacity of CVD, MBD, and MVD to the desired composite was determined as 32.84 mg.g, 31.81 mg.g, and 31.15 mg.g, respectively. In addition, the kinetic data of the removal process followed a pseudo-first order (PFO) kinetic model. Negative thermodynamic parameters were indicated that the process is spontaneous and exothermic. Finally, ad(de)sorption experiments' results showed that the synthesized nanocomposite adsorbent has an excellent ability to adsorb cationic dyes after several consecutive cycles.
一种新型磁性纳米复合材料沸石（CLT）/淀粉/CoFeO 是通过共沉淀法合成的。制备的磁性复合粉末用于从水介质中去除亚甲基蓝染料（MBD）、甲基紫染料（MVD）和结晶紫染料（CVD）。BET 分析表明，使用淀粉和 CoFeO 纳米粒子对 CLT 进行修饰提高了其比表面积，CLT、CoFeO 和 CLT/Starch/CoFeO 粉末的比表面积分别为 18.82 m.g、151.4 m.g 和 104.75 m.g。实验结果表明，pH 值 9 在三种染料的吸附过程中起着至关重要的作用。Langmuir 和 Redlich-Petersen 等温线模型很好地拟合了实验数据。此外，CVD、MBD 和 MVD 对所需复合材料的最大吸附容量分别为 32.84 mg.g、31.81 mg.g 和 31.15 mg.g。此外，去除过程的动力学数据遵循准一级（PFO）动力学模型。负的热力学参数表明该过程是自发的和放热的。最后，吸附/解吸实验结果表明，合成的纳米复合材料吸附剂在经过几次连续循环后具有吸附阳离子染料的优异能力。
