Adsorptive removal of hazardous crystal violet dye form aqueous solution using Rhizophora mucronata stem-barks: Equilibrium and kinetics studies

Oloo, Chrispine M.; Onyari, John Mmari; Wanyonyi, Wycliffe Chisutia; Wabomba, John N.; Muinde, Veronica M.

doi:10.1016/j.enceco.2020.05.001

Cited by 63 publications

(10 citation statements)

References 39 publications

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“…The analysis of its biosorbent micrograph indicates that the stem in this natural condition has greater adsorption potential. This was also identified in other studies involving aquatic macrophytes of different species that exhibit heterogeneous morphology, with porous with an irregular rough surface full of cavities that provide a perfect state of adsorption [49,50].…”

Section: Characterization Of Water Hyacinth Biomassmentioning

confidence: 53%

Application of Water Hyacinth Biomass (Eichhornia crassipes) as an Adsorbent for Methylene Blue Dye from Aqueous Medium: Kinetic and Isothermal Study

Carneiro

Barros²,

Morais³

et al. 2022

Polymers

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Water pollution has generated the need to develop technologies to remove industrial pollutants. Adsorption has been recognized as one of the most effective techniques for effluent remediation. In this study, parts (stem and leaves) of a problematic aquatic weed, the water hyacinth (Eichhornia crassipes), were separated to produce a bioadsorbent. The objective was to evaluate the adsorption of a cationic dye, methylene blue (MB), in an aqueous solution of the biomass from different parts of the water hyacinth (Eichhornia crassipes) plants. The materials were characterized through techniques of infrared spectroscopy, scanning electron microscopy, X-ray diffractometry, and thermogravimetric analysis, before and after the material adsorption. Water hyacinth biomasses presented adsorption capacity above 89%, and the kinetics was faster for stem biomass. The kinetic study found that the adsorption process is better described by the pseudo-second-order model, and the adjustments of the isotherm experimental data indicated that both materials are favorable for adsorption. Therefore, water hyacinth bioadsorbent represents a renewable resource with potential for effluent treatment.

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Section: Characterization Of Water Hyacinth Biomassmentioning

confidence: 53%

Application of Water Hyacinth Biomass (Eichhornia crassipes) as an Adsorbent for Methylene Blue Dye from Aqueous Medium: Kinetic and Isothermal Study

Carneiro

Barros²,

Morais³

et al. 2022

Polymers

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“…This factor was calculated as 0.09 for HW, 0.10 for HNa and 0.11 for HK, which were between 0 and 1. Thus, MB dye adsorption on adsorbents was found to be favourable [43][44]. The best-fitted isotherm model was Temkin isotherm with R 2 of 0.9220, 0.9413 and 0.9300 for HW, HNa and HK, respectively.…”

Section: Adsorption Isothermsmentioning

confidence: 94%

Production of chemically and microwave activated hazelnut husk as an adsorbent for dye contaminated wastewaters

Ülgüdür¹,

ELİBOL²,

Malkoç³

2021

Journal of Innovative Science and Engineering (JISE)

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Adsorption has traditionally been evaluated as an economical and easily applicable process for treating certain wastewaters, such as ones including dyes and heavy metals. Even though adsorbent materials specifically produced for the purpose of wastewater treatment commercially exist, the production cost may create an economic burden on wastewater treatment processes. Agricultural wastes can be valorized as adsorbents in adsorption processes. The adsorption capacity of these wastes can be improved via pre-treatment methods such as chemical application and microwave irradiation. This study investigated the potential applicability of hazelnut husk as an adsorbent for methylene blue (MB) dye. To this purpose, the husk was activated by sequential chemical or water and microwave applications.Structural analysis on the produced adsorbent was performed by Fourier transform infrared spectrophotometry (FTIR) and field emission scanning electron microscopy (FE-SEM).Isotherm (Langmuir, Freundlich, Temkin and Harkins-Jura isotherms) and kinetic (pseudofirst-order, pseudo-second-order, Elovich and intraparticle diffusion kinetic models) behaviours of adsorption were also evaluated. The results indicated that MB could be removed by 92-94% considering all adsorbents produced. Further isotherm and kinetic studies revealed that MB adsorption was both physically and chemically induced, and the reaction followed the pseudo-second-order kinetic model (R 2 >0.99).

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“…On the basis of the high values of the regression coefficient, (R = 1) and very close values of q e,calc with q e,exp , the pseudo-second-order rate model fitted the experimental data better than any other model studied, providing evidence that the adsorption of MV on HNC followed the pseudo-second-order kinetic model. Considerable reduction of dye amount during batch adsorption experiments and longer time needed for adsorbing species to diffuse to remote locations deep within a network of fine pores are the two contributing explanations for these results [79,80].…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Removal of Methyl Violet from Aqueous Solution by Adsorption onto Halloysite Nanoclay: Experiment and Theory

Sadiku

Berisha

Maloku

et al. 2022

Toxics

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Methyl Violet (MV) was removed from aqueous solutions by adsorption onto halloysite nanoclay (HNC) employing equilibrium, kinetics, thermodynamic data, molecular modellingR (MD), and Monte Carlo (MC) simulations. The chosen experimental variables were pH, temperature, starting MV concentration, contact time, and adsorbent dosage. The adsorption rate was determined to increase with increasing contact time, initial dye concentration, pH, and temperature. The Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich (D-R) isotherms were utilized to determine the adsorption capacity of HNC. The Langmuir equation matched equilibrium data better than the other models, whereas the pseudo-second-order model better described kinetic data, and thermodynamic analyses revealed that the adsorption process was spontaneous, endothermic, and physisorption-based. This study focused on two distinct molecular mechanics-based theoretical approaches (MC and MD). These techniques enabled a molecular comprehension of the interaction between the MV molecule and the halloysite surface. Theoretical results were consistent with experimental findings. The outcomes revealed that HNC is an excellent dye adsorbent for industrial effluents.

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Adsorptive removal of hazardous crystal violet dye form aqueous solution using Rhizophora mucronata stem-barks: Equilibrium and kinetics studies

Cited by 63 publications

References 39 publications

Application of Water Hyacinth Biomass (Eichhornia crassipes) as an Adsorbent for Methylene Blue Dye from Aqueous Medium: Kinetic and Isothermal Study

Application of Water Hyacinth Biomass (Eichhornia crassipes) as an Adsorbent for Methylene Blue Dye from Aqueous Medium: Kinetic and Isothermal Study

Production of chemically and microwave activated hazelnut husk as an adsorbent for dye contaminated wastewaters

Removal of Methyl Violet from Aqueous Solution by Adsorption onto Halloysite Nanoclay: Experiment and Theory

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