The uptake of Methyl Orange (MO) and Methylene Blue (MB) from aqueous solutions onto Pine leaves (Pinus kesiya) was investigated in this work. The pine leaves was dried, grinded and thermally treated at 300 o C. Factors including pH solution, contact time, initial dye concentration were discovered to be relevant in the removal of dyes. Among four isotherm models (Langmuir, Sips, Freundlich, and Temkin), the experimental data was fitted the Langmuir model better than others. For MO and MB, the maximum Langmuir adsorption capacities were 136.99 mg.g − 1 and 140.85 mg.g − 1 , respectively. The kinetic studies demonstrated that the biosorption of MO and MB onto pine leaves was compatible with Elovich, pseudo-first-order, pseudo-second-order and intra-particle diffusion models. The thermodynamic studies showed that the uptake of the two dyes was regulated by physisorption, spontaneous, and endothermic in nature. Electrostatic interactions, as well as other non-covalent forces such as π–π interactions and hydrogen bonds, are mechanisms of dyes adsorption on heat treated pine leaves biomass. The current study found that pine leaves (Pinus kesiya) might be a potential biosorbent for the wastewater treatment due to their high availability and production, resulting in various environmental advantages.
Kinetic studies play an instrumental role in determining the most appropriate reaction rate model for industrial-scale applications. This study focuses on the kinetics methylene blue (MB) adsorption from aqueous solutions by biochar derived from jackfruit peel. Various kinetic models, including pseudo-first-order (PFO), pseudo-second-order (PSO), intra-diffusion, and Elovich models, were applied to study MB adsorption kinetics of jackfruit peel biochar. The experiments were performed with two initial concentrations of MB (24.23 mg/L and 41.42 mg/L) over a span of 240 min. Our findings emphasized that the Elovich model provided the best fit of the experimental data for MB adsorption. When compared to other materials, biochar from jackfruit peel emerges as an eco-friendly adsorbent for dye decolorization, with potential applications in the treatment of environmental pollution.
The uptake of Methyl Orange (MO) and Methylene Blue (MB) from aqueous solutions onto Pine leaves (Pinus kesiya) was investigated in this work. Factors including pH solution, contact time, initial dye concentration were discovered to be relevant in the removal of dyes. Among four isotherm models (Langmuir, Sips, Freundlich, and Temkin), the experimental data was fitted the Langmuir model better than others. For MO and MB, the maximum Langmuir adsorption capacities were 136.99 mg.g − 1 and 140.85 mg.g − 1 , respectively. The kinetic studies demonstrated that the biosorption of MO and MB onto biomass of pine leaves was compatible with Elovich, pseudo-first-order, pseudo-second-order and intra-particle diffusion models. The thermodynamic studies showed that the uptake of the two dyes was regulated by physisorption, spontaneous, and endothermic in nature. Electrostatic interactions, as well as other non-covalent forces such as π–π interactions and hydrogen bonds, are mechanisms of dyes adsorption on pine leaf biomass. The current study found that pine leaves (Pinus kesiya) might be a potential biosorbent for the wastewater treatment due to their high availability and production, resulting in various environmental advantages.
In this study, biochar derived from Jackfruit peel (JA) via the pyrolysis at 500 °C for 2 h was used as an adsorbent to remove Methylene Blue (MB) from aqueous solution. Effects of pH, contact time, and initial MB concentration were investigated. Isotherm models, such as Langmuir, Freundlich, Sips, and Dubinin-Radushkevich, were applied to estimate the adsorption in nature. The results indicated that the Sips and Freundlich models gave the best fit with experimental datas. The maximum adsorption capacity of MB calculated from Langmuir was 39.87 mg/g at 306K, pH = 11, and time = 60 min. The E value evaluated from Dubinin-Radushkevich smaller than 8 kJ/mol indicated that the MB adsorption of JA followed a physical process.
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