Adsorption Characteristics of Methylene Blue on Activated Carbon from Rice Husk Ash by Chemical-Thermal Process

Zhang, Jin Hua; Xiao, Kai; Huang, Fei

doi:10.4028/www.scientific.net/amr.518-523.2303

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…was used for calculating %Cr(VI) removal.

q_{t} = \frac{true(C_{t = 0} - C_{t = t} true) V}{M} when t = \infty; q_{t} = q_{e}

% Cr true(VI true) removal = \frac{true(C_{t = 0} - C_{t = \infty} true)}{C_{t = 0}} \times 100

where C t =0 and C t = t (mg/L) are the concentrations of Cr(VI) at initial and at time t , V is volume of the solution (L), M is mass of the dry adsorbent fed (g), and q e is uptake capacity at equilibrium …”

Section: Methodsmentioning

confidence: 99%

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Ravi

Jabasingh

2017

J of Applied Polymer Sci

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Chitosan (90% deacetylated) coated magnetic adsorbent prepared by coprecipitation method to remove Cr(VI) from its aqueous solution. The experimental studies depicts that the predominant option for removal of Chromium by adsorption from its aqueous phase using Magnetic‐Chitosan (MC). The subsequent physical, chemical, and magnetic properties of MC were characterized by X‐ray powder diffraction, scanning electron microscopy, Fourier transform infrared spectrometer, vibrating sample magnetometer. The influence of batch process parameters such as contact time, initial concentration, pH, and coexisting anions were investigated. The Box‐Behnken experimental design in response surface methodology was performed to design the experiment optimal operating conditions. The maximum percentage reduction of Cr(VI) is 96.3 that was obtained by magnetic chitosan with the optimal operating conditions of 149.53 mg/L at pH of 5.32 at the contact time of 80 min and at the temperature of 303 K. The average diameter of the magnetic chitosan was calculated from X‐ray diffractometer analysis as 24.5 nm. The equilibrium adsorption isotherm models such as Langmuir and Freundlich and the adsorption kinetics such as pseudo first order, pseudo second order and intra‐particle diffusion kinetic model were analyzed. The experimental data's suited for the best fit with the Langmuir isotherm model and pseudo first order kinetic model. It also revealed that Cr(VI) adsorption on MC is intrinsically exothermic and spontaneous. The magnetic chitosan was also used to investigate for the removal of Cr(VI) from the real water sources such as surface, underground, and tannery wastewater. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45878.

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“…was used for calculating %Cr(VI) removal.

q_{t} = \frac{true(C_{t = 0} - C_{t = t} true) V}{M} when t = \infty; q_{t} = q_{e}

% Cr true(VI true) removal = \frac{true(C_{t = 0} - C_{t = \infty} true)}{C_{t = 0}} \times 100

Section: Methodsmentioning

confidence: 99%

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Ravi

Jabasingh

2017

J of Applied Polymer Sci

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“…Physical activation is conducted by igniting the product under CO 2 or N 2 gas streams [ 32 ], while chemical activation involves treating the material with chemicals such as sodium hydroxide (NaOH), phosphoric acid (H 3 PO 4 ), and zinc chloride (ZnCl 2 ). Chemically AC is found to have better properties in terms of good mesoporous structure and large surface area [ 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Valorization of Rice Husk and Straw Agriculture Wastes of Eastern Saudi Arabia: Production of Bio-Based Silica, Lignocellulose, and Activated Carbon

et al. 2022

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Bio-based silica, lignocellulose, and activated carbon were simply produced via the recycling of Hassawi rice biomass waste of Al-Ahsa governorate in the eastern Saudi Arabia region using a fast chemical treatment procedure. Rice husk and rice straw wastes were collected, ground, and chemically treated with sodium hydroxide to extract silica/silicate from the dried plant tissues. The liquid extract is then treated with acid solutions in order to precipitate silica/silicate at neutral medium. Lowering the pH of the supernatant to 2 resulted in the precipitation of lignocellulose. Thermal treatment of the biomass residue under N2 gas stream resulted in activated carbon production. Separated products were dried/treated and characterized using several physical examination techniques, such as FT-IR, SEM/EDX, XRD, and Raman spectroscopy in order to study their structure and morphology. Silica and lignocelluloses products were then preliminarily used in the treatment of wastewaters and water-desalination processes.

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Chemically Activated Carbon Synthesized from Rice Husk for Adsorption of Methylene Blue in Polluted Water

Wazir

Ullah

Yaqoob

2023

Environmental Engineering Science

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Adsorption Characteristics of Methylene Blue on Activated Carbon from Rice Husk Ash by Chemical-Thermal Process

Cited by 3 publications

References 10 publications

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Valorization of Rice Husk and Straw Agriculture Wastes of Eastern Saudi Arabia: Production of Bio-Based Silica, Lignocellulose, and Activated Carbon

Chemically Activated Carbon Synthesized from Rice Husk for Adsorption of Methylene Blue in Polluted Water

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