Research Article
Acid Activated Biochar Prepared from Avocado Pomace for Remediation of Methyl Orange Contaminated Aqueous Solution
Zeleke Zewde Babanto*
,
Jafer Esmael,
Guta Gonfa
Issue:
Volume 9, Issue 1, June 2025
Pages:
1-12
Received:
24 May 2025
Accepted:
11 June 2025
Published:
30 June 2025
Abstract: This study focused on the remediation of methyl orange (MO) from wastewater by preparation of acid activated biochar from avocado pomace, which was obtained from Jimma Industrial Park, Ethiopia. This avocado pomace was considered as a solid waste and accumulated on waste disposal areas of the industrial park. The optimal temperature of 500 °C was selected for further biochar preparation. Physicochemical properties of the biochar have fixed carbon content (71.15 ± 0.84%), ash content (12.95 ± 0.35%), moisture content (10.40 ± 0.45%), volatile matter content (5.50 ± 0.62%) as well as PZC (7.4 ± 0.85). The acid activated biochar at optimum temperature of before and after adsorption was characterized via FTIR, XRD, and SEM. The main parameters of solution pH (5), initial concentration (60 mg/L), mass of adsorbent (0.5 g), and contact time (120 min) were optimized. Langmuir model was more fitted to experimental data and adsorption mechanism was chemisorption; leads to the formation monolayer on the homogenous active site with maximum adsorption capacity 22.988 mg/g. The adsorption phenomena were consistent with PSO kinetics model (R2=0.9997) and adsorption mechanism was chemisorption. Thus, this low cost environmental friendly industrial waste effectively removes MO dye and solves the problem of industrial wastewater through adsorption. More research finding is recommended to study how well this adsorbent works in real wastewater samples.
Abstract: This study focused on the remediation of methyl orange (MO) from wastewater by preparation of acid activated biochar from avocado pomace, which was obtained from Jimma Industrial Park, Ethiopia. This avocado pomace was considered as a solid waste and accumulated on waste disposal areas of the industrial park. The optimal temperature of 500 °C was ...
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Review Article
An In-Depth Review of Sustainable and Environmentally Friendly Pretreatment Techniques for Cellulose Extraction from Lignocellulosic Biomass and Their Uses
Sayudi Haruna Yahaya*,
Chika Muhammad,
Sirajo Abubakar Zauro,
Ibrahim Muhammad Magami
Issue:
Volume 9, Issue 1, June 2025
Pages:
13-33
Received:
10 March 2025
Accepted:
1 April 2025
Published:
31 July 2025
DOI:
10.11648/j.ajaic.20250901.12
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Views:
Abstract: Lignocellulosic biomass (LCB), primarily composed of cellulose, hemicellulose, and lignin, represents a valuable renewable resource. Among these components, cellulose is the most abundant biodegradable polymer, with significant industrial potential. However, its efficient isolation remains a major challenge due to its strong association with hemicellulose and lignin within the complex LCB structure. Effective pretreatment strategies are essential to overcome these structural barriers and facilitate cellulose extraction. Conventional pretreatment methods, while effective, often rely on harsh chemicals, elevated temperatures, and high energy inputs, leading to increased costs, low yields, and the formation of fermentation inhibitors, which hinder sustainable biomass utilization. In response to these limitations, environmentally friendly pretreatment approaches have been developed to enhance cellulose separation while minimizing ecological and economic drawbacks. These green methods prioritize efficient delignification, reduced solvent consumption, lower environmental impact, and alignment with sustainable technological advancements. This review explores the application of eco-friendly pretreatment techniques for cellulose isolation from diverse lignocellulosic biomass sources. It further highlights the role of cellulose as a crucial feedstock in the bioeconomy, emphasizing its versatility across various industrial sectors. By advancing sustainable cellulose extraction methods, this research contributes to the broader goal of developing environmentally responsible and economically viable biorefinery processes.
Abstract: Lignocellulosic biomass (LCB), primarily composed of cellulose, hemicellulose, and lignin, represents a valuable renewable resource. Among these components, cellulose is the most abundant biodegradable polymer, with significant industrial potential. However, its efficient isolation remains a major challenge due to its strong association with hemice...
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