Effect of Salinity on the Adsorption Behavior of Methylene Blue onto Comminuted Raw Avocado Residue: CCD-RSM Design

Netto, Matias Schadeck; Silva, Nathália Favarin da; Mallmann, Evandro Stoffels; Dotto, Guilherme L.; Foletto, Edson Luiz

doi:10.1007/s11270-019-4230-x

Cited by 21 publications

(1 citation statement)

References 50 publications

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“…According to the scientific literature, in other previous studies, the general order kinetic model described the adsorption of the methylene blue dye on bilberry leaves [12], ultrasonic surface modified chitin [47], cassava bagasse [48], comminuted raw avocado seeds [49] and golden trumpet tree bark [50].…”

Section: Adsorption Kineticmentioning

confidence: 99%

Modelling and Optimization of Methylene Blue Adsorption Process on Leonurus cardiaca L. Biomass Powder

Mosoarca,

Popa,

Vancea

et al. 2023

Processes

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The main objective of this study was to optimize the adsorption process of methylene blue on a natural, low-cost adsorbent, Leonurus cardiaca L. biomass powder, in order to maximize dye removal efficiency from aqueous solutions. For this purpose, the Taguchi method was used based on an L27 orthogonal array design considering six controllable factors at three levels. The percentage contribution of each factor was computed using analysis of variance (ANOVA). The optimal adsorption conditions were established. The experimental data from equilibrium and kinetic studies were modelled using specific equilibrium isotherms and kinetic models. Thermodynamic parameters were calculated in order to determine the main adsorption mechanism. The obtained results showed that the ionic strength is the factor that most influences dye adsorption (percentage contribution 72.33%), whereas the adsorbent dose had the least impact. The Sips isotherm and the general kinetic model most accurately characterized the process. The maximum adsorption capacity 103.21 (mg g−1) indicated by the Sips isotherm and the equilibrium time (40 min) were better compared to the values obtained for other bio-adsorbents used for methylene blue adsorption. The main mechanism involved in the adsorption is physisorption, while chemisorption only contributes marginally to the process.

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Section: Adsorption Kineticmentioning

confidence: 99%

Modelling and Optimization of Methylene Blue Adsorption Process on Leonurus cardiaca L. Biomass Powder

Mosoarca,

Popa,

Vancea

et al. 2023

Processes

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Polydopamine functionalized cellulose-MXene composite aerogel with superior adsorption of methylene blue

Zhang

et al. 2021

Cellulose

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Effective RhB Dye Removal Using Sustainable Natural Bioadsorbents Synthesized from Avocado Seed and Skin

Orozco,

Montiel,

Valencia

et al. 2024

Water Air Soil Pollut

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Managing waste generated by the food industry is a pressing environmental challenge, and traditional disposal methods such as landfilling or incineration are no longer viable solutions. However, by recovering and valorizing waste in wastewater treatment, we can address the waste management issue and the energy-intensive nature of conventional treatment methods with processes compatible with renewable energy technologies. In this work, avocado skin and seed are valorized for their application in removing Rhodamine B (RhB) dye. Avocado skin (ASk) and seed (ASe) were recovered and recycled separately to develop natural bioadsorbents. Biomaterials were characterized by XRD, XPS, ICP-MS, ATR-FTIR spectroscopy, TGA, N2 adsorption/desorption, and SEM. The ASk and ASe bioadsorbents were employed to remove RhB at four experimental conditions: pH, RhB concentration, bioadsorbent concentration, and temperature. RhB removal was followed by UV–Vis spectroscopy. The results show that at pH 3, the highest percentages of dye removal are achieved, using ASk and ASe, with 88 and 92% removal, respectively. ASe bioadsorbent is more effective for removing RhB dye, reaching 92% after 4 h of contact with 2 g L−1 of bioadsorbent and at 30 °C. Experimental results better fit a pseudo-second-order kinetic model and the Langmuir adsorption model, with maximum adsorption capacities of 13.1240 and 17.9998 mg g−1 for ASk and ASe, respectively. The results show that natural bioadsorbents are suitable options for environmental remediation.

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Effect of Salinity on the Adsorption Behavior of Methylene Blue onto Comminuted Raw Avocado Residue: CCD-RSM Design

Cited by 21 publications

References 50 publications

Modelling and Optimization of Methylene Blue Adsorption Process on Leonurus cardiaca L. Biomass Powder

Modelling and Optimization of Methylene Blue Adsorption Process on Leonurus cardiaca L. Biomass Powder

Polydopamine functionalized cellulose-MXene composite aerogel with superior adsorption of methylene blue

Effective RhB Dye Removal Using Sustainable Natural Bioadsorbents Synthesized from Avocado Seed and Skin

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