Biosorption of Crystal violet, Congo red and Methyl orange on Nephelium lappaceum stem-derived activated carbon and its composite with chitosan

Q4 Earth and Planetary Sciences
Samad Kamdod Abdul, V. Ektha, S. Shika, Pavan Kumar Malladi V.
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引用次数: 0

Abstract

Activated carbon was prepared using Nephelium lappaceum stem as the pre-cursor biomass. A bio-composite with chitosan and the activated carbon (NLAC) was synthesized. The activated carbon and the bio-composite were tested for the adsorptive removal of three dyes, namely Crystal violet (CV), Congo red (CR) and Methyl orange (MO), from their aqueous solutions. The characterization of each adsorbent revealed higher value for surface area, satisfactory mechanical strength, higher crystallinity as well as superior porosity. The batch adsorption equilibrium data were best fitted to Langmuir isotherm model. A maximum adsorption capacity of 212.1 mg/g was seen for CV using NLAC. For CR and MO, the maximum adsorption capacitity values were 182.57 mg/g and 64.21 mg/g respectively with CHS-NLAC composite. Electrostatic interaction was the dominant mechanism in the adsorption of the dyes and the rate controlling steps in the adsorption were reasoned in the kinetic studies.
枸杞茎源活性炭及其壳聚糖复合材料对结晶紫、刚果红和甲基橙的吸附性能
以枸杞子茎为前驱生物质制备活性炭。合成了壳聚糖和活性炭(NLAC)复合材料。研究了活性炭和生物复合材料对结晶紫(CV)、刚果红(CR)和甲基橙(MO)三种染料的吸附去除效果。各吸附剂具有较高的比表面积、较好的机械强度、较高的结晶度和优良的孔隙率。间歇吸附平衡数据最符合Langmuir等温线模型。NLAC对CV的最大吸附量为212.1 mg/g。CHS-NLAC对CR和MO的最大吸附量分别为182.57 mg/g和64.21 mg/g。静电相互作用是染料吸附的主要机理,并在动力学研究中推导了吸附的速率控制步骤。
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来源期刊
CiteScore
0.50
自引率
0.00%
发文量
195
审稿时长
4-8 weeks
期刊介绍: Information not localized
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