Dye removal kinetics and adsorption studies of activated carbon derived from the stems of Phyllanthus reticulatus

“…The other research work used carbon from Phyllanthus reticulatus plant to remove RO 16 from aqueous media. In this study, maximum dye adsorption was found to be 85.10 % [28] . In a different study, ozonation followed by biological treatment in an aerobic MBBR was investigated for degradation of RO16.…”

Section: Introductionmentioning

confidence: 86%

A Combined Study on Degradation Mechanism of Reactive Orange 16 through Fenton‐like Process: Experimental Studies and Density Functional Theoretical Findings

2022

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In this study, the removal efficiency of Reactive orange 16 (RO16) azo dyes from aqueous solution with different Fenton reactions (Fenton/photo‐Fenton/sono‐Fenton/ sono‐photo‐Fenton) were investigated. For optimum conditions, the effects of variables such as H2O2, Fe2+, reaction time, pH and dye concentration on the oxidation process were investigated. In addition, the interaction between Fenton reagents and the dye molecule was revealed by Density Functional Theory (DFT) calculations. Important quantum chemical parameters reflecting the reactivity of the studied dye were calculated. Effective RO16 degradation was achieved by Fenton oxidation at conditions of 100 mg L−1 H2O2, 10 mg L−1 Fe2+, 100 mg L−1 dye concentration, 3 pH and 30 minutes. While the degradation efficiency with Fenton process was 97.77 %, it reached 98.78 %, 98.31 % and 98.22 % when UV−A, UV−B and UV−C lights were applied respectively. In the sono‐Fenton process application, the degradation efficiency was determined as 97.96 %. The degradation of RO16 by sono‐photo‐Fenton was 96.12 %, 96.13 % and 96.83 % under different lamps (UV−A, UV−B and UV−C), respectively. In addition, in the kinetic study, it was determined that each process complies with the zeroth‐order kinetics. To see the nature and power of the interaction between hydroxyl radical and RO16, important quantum chemical parameters of Conceptual Density Functional Theory were calculated and their effects on degradation process were discussed as detailed. Degradation mechanism was highlighted in the light of DFT calculations.

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“…This could be assigned to hydrogen bond formation between MB and LA. The positive ∆S 0 value for the chosen system is due to the improved randomness at the MB-LA solution interface [53].…”

Section: Adsorption Thermodynamic Studymentioning

confidence: 99%

Novel Biomaterial-Derived Activated Carbon from Lippia Adoensis (Var. Koseret) Leaf for Efficient Organic Pollutant Dye Removal from Water Solution

Mengesha,

Shuka,

Eyoel

et al. 2024

AJAC

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Today, various pollutants, such as dyes from industries, are being released into the environment worldwide, posing significant challenges that require sustainable attention and advanced solutions. This research focuses on the synthesis and characterization of a novel biomaterial-based activated carbon (AC) derived from Lippia Adoensis (Koseret) leaves and investigates its effectiveness in removing MB from aqueous solutions. The biomaterial adsorbent derived from LA was subjected to proximate analysis, pH-point zero charge (pHpzc), FT-IR, and SEM characterization. The pHpzc results indicated a slightly acidic surface functional group for AC. The impact of temperature and chemical impregnation (H3PO4, NaCl and NaOH) was examined, with the optimal temperature of AC preparation found to be 600°C. The use of H3PO4 for the chemical activation of biomaterials resulted in a high AC surface area. Batch adsorption experiments involved varying pH (2–10), dosage (0.1–0.35 g/50ml), initial concentration (10–35 ppm) and contact time (15–105 min). The optimal parameters were determined as pH = 8, dose = 0.25g, concentration = 10 ppm, and contact time = 75 min. The maximum adsorption capacity and removal efficiency were calculated as 3.99 and 92.2%, respectively. Thermodynamic analysis confirmed the spontaneous and endothermic nature of the system. Adsorption isotherm and kinetic studies revealed a good fit with the Langmuir isotherm (R2= 0.999), indicating monolayer adsorption and the pseudo-second order model, respectively. These findings suggest that the use of LA-AC could offer a cost-effective solution for the removal of methylene blue from water, contributing to the solution of water pollution challenges and promoting the adoption of eco-friendly wastewater treatment technologies.

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Dye removal kinetics and adsorption studies of activated carbon derived from the stems of Phyllanthus reticulatus

Cited by 20 publications

References 11 publications

Adsorption of crystal violet on activated bamboo fiber powder from water: preparation, characterization, kinetics and isotherms

Adsorption of crystal violet on activated bamboo fiber powder from water: preparation, characterization, kinetics and isotherms

A Combined Study on Degradation Mechanism of Reactive Orange 16 through Fenton‐like Process: Experimental Studies and Density Functional Theoretical Findings

Novel Biomaterial-Derived Activated Carbon from Lippia Adoensis (Var. Koseret) Leaf for Efficient Organic Pollutant Dye Removal from Water Solution

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