The potential use of activated carbon prepared from Ziziphus species for removing dyes from waste waters

Abstract

In this study, the adsorption potential of activated carbon prepared from Ziziphus mauritiana nuts for the removal of methylene blue (MB) from aqueous solution has been investigated using batch mode experiments. The effects of some operating parameters on the removal dye such as, initial pH (2-12), temperature (298-328 K), initial MB concentration (20-100 mg L -1 ), and contact time (5-70 min) were investigated. Adsorption kinetic showed that the rate adsorption followed the pseudo-second-order kinetic model. Four adsorption isotherms models were applied to experimental equilibrium data (Langmuir, Freundlich, Redlich-Peterson, and Fritz-Schlunder) and the different constants were calculated using non-linear equations models. Fritz-Schlunder model was found the best one to describe the adsorption process which suggests that the adsorption of MB onto activated carbon derived from Ziziphus mauritiana is heterogeneous with a multilayer. Thermodynamic adsorption showed that the process was endothermic and spontaneous in nature.

Initial Characterization of Activated Charcoal from the Indigenous Ziziphus mauritiana Wood from Dryland of Sumbawa

“…The aim of this study is to initially characterized activated charcoal generated from Bidara woods which utilized chemical agents such as H2SO4 and NaOH with various concentrations to activate the charcoal. Several studies have been conducted on the production of activated charcoal from Bidara seeds such as an adsorptive scavenging of cationic dyes (Khan et al, 2022), methylene blue adsorption (Regti et al, 2017), energy storage applications (Ghimire et al, 2021), and the adsorption of copper ions (Massai et al, 2020). However, currently there are limited resources about the utilisation of Bidara woods as activated charcoal and its characteristics.…”

“…In addition, the fruits and the leaves are also consumed as fresh fruits and tea, respectively. The woods of Bidara can also be utilized as the materials for activated charcoal production (Regti et al, 2017). Activated charcoal is a carbonaceous porous material with high adsorption capacity due to its reasonably large pore size, high surface reactivity, and its high specific surface area (Gao et al, 2020), (Lempang et al, 2011).…”

Biosorption of crystal violet and methylene blue dyes using coconut shell powder

“…Water bodies near industrial areas become contaminated, making the water unsuitable for human use and supporting aquatic life. Aquatic ecosystems suffer from disrupted biodiversity, and the delicate balance is disturbed, leading to a decline in the number of species (Regti1 et al, 2017). Additionally, exposure to polluted water puts communities at risk of waterborne diseases and long-term health issues, affecting public health.…”

Methods for Removing Dyes from Polluted Water; A Review

“…Effects of removing dye such as pH (2-12), temperature (298-328 K), initial methyl bromide concentration (20-100 mg L-1), and contact time (5-70 minutes) were investigated, and four samples were taken. Balanced (Langmuir, Freundlich, Riedlich-Petersson, and Fritz-Schlender) and the calculation of the constants using models of nonlinear equations and one model appeared the best (Fritz-Schlunde), and the process was good and endothermic(Regti et al, 2017). To remove antimony dye from water, there are several methods, including ion exchange, coagulation, and electrochemical treatment.…”