The present work was aimed to evaluate the adsorption properties of Casuarina fruit-based activated carbons to remove cationic (methylene blue) and anionic (congo red) dyes. The roles of activators on the characteristics and performance of activated carbons were studied. Activated carbons were characterized for textural characteristic, surface morphology, surface functional groups, elemental composition, thermal degradation analysis and pH at the zero point of charge (pHpzc). The specific surface of the materials is between 2.33 m²/g and 1511 m²/g. Batch adsorption was conducted at varying concentrations, contact times and temperatures. Results show that KOH activation yields activated carbon with excellent maximum capacities of 615 mg/g and 339 mg/g for methylene blue and congo red, respectively. The adsorption data displayed a good regression with Langmuir and pseudo-second-order kinetic models. Both intraparticle and film controlled the diffusion of dye molecules onto the carbon surface. The adsorption is endothermic and spontaneous at high temperature especially for methylene blue removal.

目前的工作旨在评估木麻黄果基活性炭去除阳离子（亚甲基蓝）和阴离子（刚果红）染料的吸附性能。研究了活化剂对活性炭特性和性能的作用。对活性炭的结构特征、表面形态、表面官能团、元素组成、热降解分析和零电荷点 (pHpzc) 的 pH 值进行表征。材料的比表面积在2.33 m ² /g和1511 m ^{2 之间}/G。在不同浓度、接触时间和温度下进行批量吸附。结果表明，KOH 活化产生的活性炭对亚甲蓝和刚果红的最大容量分别为 615 毫克/克和 339 毫克/克。吸附数据显示出与 Langmuir 和伪二级动力学模型的良好回归。颗粒内和薄膜都控制着染料分子向碳表面的扩散。吸附在高温下是吸热和自发的，特别是对于亚甲基蓝的去除。