NaOH-activated carbon of high surface area produced from coconut shell: Kinetics and equilibrium studies from the methylene blue adsorption

Cazetta, André L.; Vargas, Alexandro M.M.; Nogami, Eurica M.; Kunita, Marcos H.; Guilherme, Marcos R.; Martins, Alessandro F.; Silva, Taís L.; Moraes, Juliana C.G.; Almeida, Vitor C.

doi:10.1016/j.cej.2011.08.058

Cited by 553 publications

(187 citation statements)

References 47 publications

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“…Additionally, it is important to note that for methylene blue adsorption, activated carbon manufactured from biomass precursors showed a better uptake performance than the adsorbent used in this work (Ahmed and Dhedan, 2012;Cazetta et al, 2011;Dural et al, 2011;Foo and Hameed, 2011a, 2011bHameed et al, 2007aHameed et al, , 2007bLi et al, 2013;Olorundare et al, 2014;Pezoti et al, 2014;Vargas et al, 2011) (see Table SII in supplementary material), a bituminous coal-based activated carbon (i.e. mineral origin precursor).…”

Section: Equilibrium Adsorption Testsmentioning

confidence: 99%

“…When comparing the performance of the activated carbon used in this study with those derived from biomass, it can be noted that in general adsorption of phenol (Table SIII and SIV shown in supplementary material) and methylene blue follows a PSO model for mineralor vegetal-based activated carbon (Ahmed and Dhedan, 2012;Alvarez Rodriguez et al, 2011;Cazetta et al, 2011;Din et al, 2009;Dural et al, 2011;El-Naas et al, 2010;Foo and Hameed, 2012;Gundogdu et al, 2012;Guocheng et al, 2011;Hameed and Rahman, 2008;Hameed et al, 2007aHameed et al, , 2007bLi et al, 2013;Pezoti et al, 2014;Yang et al, 2014); however, the velocity rate constant has higher values for the vegetal-based adsorbents (Table SIII and SIV shown in supplementary material). This behavior can be attributed to the activated carbon properties as discussed previously.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

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Phenol and methylene blue adsorption on heat-treated activated carbon: Characterization, kinetics, and equilibrium studies

Sáenz-Alanís

García-Reyes

Soto-Regalado

et al. 2017

Adsorption Science & Technology

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A comprehensive study was performed for a thermally treated activated carbon to evaluate the influence of this treatment on the physical and chemical properties of the mineral activated carbon, as well as the adsorption toward phenol and methylene blue. After the heat treatment, surface area decreased and total pore volume diminished about 8.5%, and the total basic groups decreased 18% while the total acid groups increased 8% in comparison with the raw activated carbon. Equilibrium adsorption of phenol and methylene blue was described well with the Freundlich and Langmuir isotherm models, respectively. Adsorption kinetics of phenol and methylene blue was predicted adequately with the empirical pseudo-second-order model, the intraparticle diffusion model, and the homogeneous solid diffusion model, but mass transfer coefficients of the diffusion models help to better understand the adsorption phenomenon. Intraparticle diffusion seems to be the ratecontrolling step in the adsorption process, and heat-treated activated carbon in an inert atmosphere was a better adsorbent for both phenol and methylene blue than raw activated carbon.

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Section: Equilibrium Adsorption Testsmentioning

confidence: 99%

Section: Adsorption Kineticsmentioning

confidence: 99%

Phenol and methylene blue adsorption on heat-treated activated carbon: Characterization, kinetics, and equilibrium studies

Sáenz-Alanís

García-Reyes

Soto-Regalado

et al. 2017

Adsorption Science & Technology

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“…Activated carbons (ACs) exhibit a great adsorption capacity in wastewater and gas treatments as well as in catalysis, owing to their highly developed porosity, large surface area, and variable surface chemistry. However, high cost and non-renewable source of commercially available ACs limits its use as an adsorbent in developing countries [12,13]. In recent years, researchers have studied the production of ACs from cheap and renewable precursors, such as nutshells, fruit stones, coir pith, bagasse, bamboo, rice husk, and cotton stalks, etc.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Studies of Coconut Shell Carbons Prepared by KOH Activation for Removal of Lead(II) From Aqueous Solutions

et al. 2013

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Abstract:Removal of Pb 2+ from aqueous solutions using coconut shell carbons produced by KOH activation is performed in this paper. Morphology and pore structure characteristic of coconut shell carbons are analyzed by SEM and nitrogen adsorption techniques. Effects of adsorbent concentration, agitation time and initial ion concentration on the adsorption behavior are investigated, and adsorption isotherm and kinetics on coconut shell carbons are also studied. The results show that high weight ratio of KOH/sample is favorable to produce rich porous structure. The resultant coconut shell carbons with a high specific surface area of 1135 m 2 /g is obtained and demonstrates good adsorption potential on removal of Pb 2+ from aqueous solutions. Adsorption data fit well with Freundlich and Halsey isotherms. The kinetic studies indicate that adsorption behavior can be described by pseudo-second-order kinetic model, which also follows external diffusion and intra-particle diffusion in the adsorption process.

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“…The CSP has lower carbon content compare to CSAC. The high composition of carbon in the coconut shell as presented from the elemental analysis indicates a good precursor material for porous carbon [23].…”

Section: Results and Discussion Carbon Compositionmentioning

confidence: 99%

The Potential of Coconut Shell Powder (Csp) and Coconut Shell Activated Carbon (Csac) Composites as Electromagnetic Interference (Emi) Absorbing Material

Jabal¹,

Yew²,

Hoon³

2016

MJAS

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Agriculture waste is potentially useful as an alternative material to absorb and attenuate electromagnetic interference (EMI). This research highlights the use of coconut shell powder (CSP) and coconut shell activated carbon (CSAC) as raw materials with epoxy resin and amine hardener composite to absorb microwave signals over frequency of 1 -8 GHz. In order to investigate the suitability of these raw materials as EMI absorbing material, carbon composition of the raw materials is determined through CHNS Elemental Analysis. The surface morphology of the raw materials in term of porosity is investigated by using TM3000 Scanning Electron Microscope (SEM). The complex permittivity of the composites is determined by using high temperature dielectric probe in conjunction with Network Analyzer. From the result, the Carbon% of CSP and CSAC is 46.70% and 84.28% respectively. In term of surface morphology, the surface porosity of CSP and CSAC is in the range of 2 µm and 1µm respectively. For the dielectric properties, the dielectric constant and the dielectric loss factor for CSP and CSAC is 4.5767 and 64.8307and 1.2144 and 13.8296 respectively. The materials more potentially useful as substitute materials for electromagnetic interference (EMI) absorbing are discussed. Keywords: agricultural wastes, dielectric properties, carbon composition AbstrakSisa pertanian mempunyai potensi untuk digunakan sebagai bahan alternatif untuk menyerap atau melemahkan gangguan elektromagnatik (EMI). Kajian ini menekankan kepada penggunaan serbuk tempurung kelapa (CSP) dan karbon teraktif tempurung kelapa(CSAC) sebagai bahan mentah dengan campuran resin epoksi dan komposit penguat amina untuk menyerap gelombang mikro dalam frekuensi 1 -8 GHz. Bagi mengkaji kesesuaian bahan mentah sebagai bahan penyerap gelombang mikro, komposisi karbon dalam bahan mentah ditentukan mengunakan analisis unser CHNS. Liang permukaan bahan mentah pula dikaji mengunakan mikroskop pengimbas elektron TM3000 (SEM). Ketelusan kompleks bagi bahan campuran diukur menggunakan prob dielektrik suhu tinggi dan alat analisis rangkaian. Daripada keputusan yang diperolehi, peratusan karbon dalam CSP dan CSAC adalah sebanyak 46.70 % dan 84.28 %. Manakala dari segi liang permukaan pula, keliangan CSP dan CSAC masing -masing berada dalam lingkungan 2um dan 1um.Bagi sifat dielektrik, pemalar dielektrik untuk CSP dan CSAC masing -masing adalah 4.5767 dan 64.8307. Bagi pembelauan dielektrik, nilai untuk CSP dan CSAC masing -masing adalah 1.2144 dan 13.8296. Isu bahan yang lebih berpotensi untuk digunakan sebagai bahan penyerap gangguan elektromagnatik (EMI) dibincangkan.

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NaOH-activated carbon of high surface area produced from coconut shell: Kinetics and equilibrium studies from the methylene blue adsorption

Cited by 553 publications

References 47 publications

Phenol and methylene blue adsorption on heat-treated activated carbon: Characterization, kinetics, and equilibrium studies

Phenol and methylene blue adsorption on heat-treated activated carbon: Characterization, kinetics, and equilibrium studies

Adsorption Studies of Coconut Shell Carbons Prepared by KOH Activation for Removal of Lead(II) From Aqueous Solutions

The Potential of Coconut Shell Powder (Csp) and Coconut Shell Activated Carbon (Csac) Composites as Electromagnetic Interference (Emi) Absorbing Material

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