Mesoporous activated coconut shell-derived hydrochar prepared via hydrothermal carbonization-NaOH activation for methylene blue adsorption

Islam, Md. Azharul; Ahmed, Muthanna J.; Khanday, Waheed Ahmad; Asif, Mohammad; Hameed, B.H.

doi:10.1016/j.jenvman.2017.07.029

Cited by 282 publications

(72 citation statements)

References 36 publications

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“…Over the years, applications of dyes in different industries including paper, textile, printing, plastics, food, rubber, etc have raised global concerns due to increasing contaminations to the ecosystems thereby raising issues to public health. The discharges of the effluents produced from these industries have detrimental consequences to aquatic life and humans [12,13,14,15]. Also large volumes of water are required by textile industries in their operations, which in turn lead to the release of large volumes of effluents [3,4].…”

Section: Introductionmentioning

confidence: 99%

Rhodamine B dye sequestration using Gmelina aborea leaf powder

Bello

Alabi

Adegoke

et al. 2020

Heliyon

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Chemically prepared activated carbon derived from Gmelina aborea leaves (GALAC) were used as adsorbent for the removal of Rhodamine B (Rh-B) dye from aqueous solutions. The adsorptive characteristics of activated carbon (AC) prepared from Gmelina aborea leaves (GAL) were studied using SEM, FTIR, pH point of zero charge (pH pzc) and Boehm Titration (BT) techniques respectively. The effects of pH, contact time, initial dye concentration and solution temperature were also examined. Experimental data were analyzed using four different isotherm models: Langmuir, Freundlich, Temkin and Dubinin-Radushkevich. Four adsorption kinetic models: Pseudo-first-order (PFO), Pseudo-second-order (PSO), Elovich and Intraparticle diffusion models to establish the kinetics of adsorption process. The RhB dye adsorption on GALAC was best described by Langmuir isotherm model with maximum monolayer coverage of 1000 mg g À1 and R 2 value of 0. 9999. The EDX analysis revealed that GALAC contained 82.81% by weight and 91.2% by atom of carbon contents which are requisites for high adsorption capacity. Adsorption kinetic data best fitted the PSO kinetic model. Thermodynamic parameters obtained for GALAC are (ΔG o ranged from-22.71 to-18.19 kJmol-1 ; ΔH o : 1.51 kJmol-1 ; and ΔS o : 0.39 kJmol-1 K À1 respectively) indicating that the RhB dye removal from aqueous solutions by GALAC was spontaneous and endothermic in nature. The cost analysis established that GALAC is approximately eleven times cheaper than CAC thereby providing a saving of 351.41USD/kg. Chemically treated GAL was found to be an effective absorbent for the removal of RhB dye from aqueous solution.

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Section: Introductionmentioning

confidence: 99%

Rhodamine B dye sequestration using Gmelina aborea leaf powder

Bello

Alabi

Adegoke

et al. 2020

Heliyon

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“…carboxylic, phenolic, hydroxyl) on the surface (Elaigwu and Greenway, 2016;Jain et al, 2016). Therefore, a considerable amount of investigations on the potential use and pertaining mechanisms of hydrochar in removing various contaminants from the aqueous phase has been undertaken lately (Islam et al, 2017;Sun et al, 2015;Xue et al, 2012). For example, Sun et al (2011) demonstrated that for the given polar and nonpolar organic contaminants (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effect of nitric acid oxidation on the surface of hydrochars to sorb methylene blue: An adsorption mechanism comparison

Nguyen

Tran

Chao

et al. 2019

Adsorption Science & Technology

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The capacity and underlying mechanism of hydrochars derived from commercial D-glucose and wasted orange peels (designated as pristine-hydrochars) and further modified with nitric acid (designated as oxidized-hydrochars) to adsorb methylene blue were investigated. Both pristineand oxidized-hydrochars were characterized by scanning electron microscopy, Brunauer-Emmet-Teller-specific surface area, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and mass titration. The maximum methylene blue adsorption capacity at 30 C

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“…[52,[77][78][79][80] Coconut shells,a sagood carbon precursor,h ave ah igh purity,d ust-free naturew ith ar egularp orous structure;t hese are produced in amountso fa bout 577 000 tons per year in Malaysiaa nd are often chosen for the preparation of carbonbased materials for the adsorption of CO 2 . [77,81,82] Son et al prepared carbon molecular sieves using coconut shell char as the raw material. [77] Magnesium, calcium, cobalt, copper,a nd nickel were doped into the coconut char and then calcined at ac ertain temperature.…”

Section: Wooden Shellsmentioning

confidence: 99%

Solid‐Waste‐Derived Carbon Dioxide‐Capturing Materials

et al. 2019

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Solid sorbents are considered to be promising materials for carbon dioxide capture. In recent years, many studies have focused on the use of solid waste as carbon dioxide sorbents. The use of waste resources as carbon dioxide sorbents not only leads to the development of relatively low‐cost materials, but also eliminates waste simultaneously. Different types of waste materials from biomass, industrial waste, household waste, and so forth were used as carbon dioxide sorbents with sufficient carbon dioxide capture capacities. Herein, progress on the development of carbon dioxide sorbents produced from waste materials is reviewed and covers key factors, such as the type of waste, preparation method, further modification method, carbon dioxide sorption performance, and kinetics studies. In addition, a new research direction for further study is proposed. It is hoped that this critical review will not merely sum up the major research directions in this field, but also provide significant suggestions for future work.

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Mesoporous activated coconut shell-derived hydrochar prepared via hydrothermal carbonization-NaOH activation for methylene blue adsorption

Cited by 282 publications

References 36 publications

Rhodamine B dye sequestration using Gmelina aborea leaf powder

Rhodamine B dye sequestration using Gmelina aborea leaf powder

Effect of nitric acid oxidation on the surface of hydrochars to sorb methylene blue: An adsorption mechanism comparison

Solid‐Waste‐Derived Carbon Dioxide‐Capturing Materials

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