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Preparation and Characterization of Porous Palygorskite/Carbon Composites through Zinc Chloride Activation for Wastewater Treatment
Clays and Clay Minerals ( IF 2.2 ) Pub Date : 2022-06-13 , DOI: 10.1007/s42860-022-00187-4
Yan Wang , Yu Zhuang , Sheng Wang , Yin Liu , Lingbing Kong , Jianjun Li , Huayong Chen

In order to develop high-performance adsorbents to remove toxic methylene blue (MB) from wastewater, palygorskite (Plg) was utilized as a template to prepare palygorskite/carbon (Plg/C) composites by using a hydrothermal reaction in the presence of glucose. The porous Plg/C composites were then activated with ZnCl2. The effects of the dose of the activator and the activation temperature on the crystal structure, micro-morphology, specific surface area, and adsorption performance of the porous Plg/C composites were studied systematically here. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results indicated that the crystal structure of Plg was destroyed during the activation process and irregular porous carbon was closely attached to the residual aluminosilicate skeleton. The activation was optimized at 400°C with a ZnCl2:Plg/C impregnation ratio of 2:1. The sample had a specific surface area of 1497.88 m2/g, together with a total pore volume and micropore volume of 1.0355 and 0.5464 cm3/g, respectively. The MB adsorption capacity was 381.04 mg/g. Such inexpensive, high-performance, porous Plg/C composites could find potential applications in wastewater treatment.



中文翻译:

用于废水处理的氯化锌活化制备多孔坡缕石/碳复合材料及其表征

为了开发高性能吸附剂以去除废水中的有毒亚甲基蓝 (MB),以坡缕石 (Plg) 为模板,在葡萄糖存在下通过水热反应制备坡缕石/碳 (Plg/C) 复合材料。然后用 ZnCl 2活化多孔 Plg/C 复合材料. 本文系统地研究了活化剂的剂量和活化温度对多孔Plg/C复合材料的晶体结构、微观形貌、比表面积和吸附性能的影响。X射线衍射(XRD)和扫描电子显微镜(SEM)结果表明,Plg的晶体结构在活化过程中被破坏,不规则的多孔碳紧密附着在残留的硅铝酸盐骨架上。活化在 400°C 下优化,ZnCl 2 :Plg/C 浸渍比为 2:1。样品的比表面积为1497.88 m 2 /g,总孔容和微孔容分别为1.0355和0.5464 cm 3/g,分别。MB吸附容量为381.04 mg/g。这种廉价、高性能、多孔的 Plg/C 复合材料可以在废水处理中找到潜在的应用。

更新日期:2022-06-14
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