Comparative Study of Basic, Acid and Reactive Dyes Adsorption onto Rubber Seed-Coated Activated Carbon

2015 ◽  
Vol 802 ◽  
pp. 425-430
Author(s):  
Muhd Nazmi Ismail ◽  
Hamidi Abdul Aziz ◽  
Mohd Azmier Ahmad ◽  
Nik Athirah Yusoff
Keyword(s):  
Experimental Data ◽  
Activated Carbon ◽  
Comparative Study ◽  
Adsorption Process ◽  
Reactive Dyes ◽  
Batch Process ◽  
Adsorption Models ◽  
Rubber Seed ◽  
Initial Concentration ◽  
Dyes Adsorption

In this present study, rubber seed-coated activated carbon (RSCAC) was used as a natural adsorbent to remove basic (MB), acid (MR) and reactive (RBV) dyes using batch process. Each dye in the adsorption process was tested at different initial concentration from 50-500 mg/l. Different dyes showed different percentage removals. The highest removal was recorded by MB which was up to 99.9 %. The experimental data was analyzed with Langmuir and Freundlich adsorption models. The data fitted well with Langmuir. The adsorption capacity were 332.99, 210.33 and 155.37 mg/g for MB, MR and RBV, respectively.

scholarly journals Characterization and Modelling Studies of Activated Carbon Produced from Rubber-Seed Shell Using KOH for CO2 Adsorption

Processes ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 855 ◽  
Author(s):  
Azry Borhan ◽  
Suzana Yusup ◽  
Jun Wei Lim ◽  
Pau Loke Show
Keyword(s):  
Experimental Data ◽  
Activated Carbon ◽  
Co2 Adsorption ◽  
Chemical Activation ◽  
Freundlich Isotherm ◽  
Nitrogen Adsorption ◽  
Rubber Seed ◽  
Modelling Studies ◽  
Carbon Dioxide Co2 ◽  
Activation Conditions

Global warming due to the emission of carbon dioxide (CO2) has become a serious problem in recent times. Although diverse methods have been offered, adsorption using activated carbon (AC) from agriculture waste is regarded to be the most applicable one due to numerous advantages. In this paper, the preparation of AC from rubber-seed shell (RSS), an agriculture residue through chemical activation using potassium hydroxide (KOH), was investigated. The prepared AC was characterized by nitrogen adsorption–desorption isotherms measured in Micrometrices ASAP 2020 and FESEM. The optimal activation conditions were found at an impregnation ratio of 1:2 and carbonized at a temperature of 700 °C for 120 min. Sample A6 is found to yield the largest surface area of 1129.68 m2/g with a mesoporous pore diameter of 3.46 nm, respectively. Using the static volumetric technique evaluated at 25 °C and 1.25 bar, the maximum CO2 adsorption capacity is 43.509 cm3/g. The experimental data were analyzed using several isotherm and kinetic models. Owing to the closeness of regression coefficient (R2) to unity, the Freundlich isotherm and pseudo-second kinetic model provide the best fit to the experimental data suggesting that the RSS AC prepared is an attractive source for CO2 adsorption applications.

scholarly journals Phenol removal from aqueous solution using silica and activated carbon derived from rice husk

2019 ◽  
Vol 14 (4) ◽  
pp. 897-907 ◽  
Author(s):  
Hosseinali Asgharnia ◽  
Hamidreza Nasehinia ◽  
Roohollah Rostami ◽  
Marziah Rahmani ◽  
Seyed Mahmoud Mehdinia
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Water Treatment ◽  
Organic Pollutants ◽  
Rice Husk ◽  
Contact Time ◽  
Adsorption Process ◽  
Phenol Removal ◽  
Initial Concentration ◽  
Maximum Removal

Abstract Phenol and its derivatives are organic pollutants with dangerous effects, such as poisoning, carcinogenicity, mutagenicity, and teratogenicity in humans and other organisms. In this study, the removal of phenol from aqueous solution by adsorption on silica and activated carbon of rice husk was investigated. In this regard, the effects of initial concentration of phenol, pH, dosage of the adsorbents, and contact time on the adsorption of phenol were investigated. The results showed that the maximum removal of phenol by rice husk silica (RHS) and rice husk activated carbon (RHAC) in the initial concentration of 1 mgL−1 phenol, 2 gL−1 adsorbent mass, 120 min contact time, and pH 5 (RHS) or pH 6 (RHAC) were obtained up to 91% and 97.88%, respectively. A significant correlation was also detected between increasing contact times and phenol removal for both adsorbents (p < 0.01). The adsorption process for both of the adsorbents was also more compatible with the Langmuir isotherm. The results of this study showed that RHS and RHAC can be considered as natural and inexpensive adsorbents for water treatment.

scholarly journals USE OF ACTIVATED CHARCOAL AS BIO-ADSORBENT FOR TREAMENT OF RESIDUAL WATERS: A REVIEW

Nativa ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 215-221
Author(s):  
Lucélio Mendes Ferreira ◽  
Rafael Rodolfo de Melo
Keyword(s):  
Environmental Management ◽  
Activated Charcoal ◽  
Contact Time ◽  
Water Adsorption ◽  
Adsorption Process ◽  
Industrial Effluents ◽  
Adsorption Models ◽  
Initial Concentration ◽  
Isotherm Adsorption ◽  
Removal Of Contaminants

ABSTRACT: Adsorption is gaining attention by becoming one of the most used technologies for the removal of contaminants from water. Adsorption with activated charcoal (AC) is an efficient method for treatment of effluents; the main advantage of AC production is the use of residues that would be inappropriate discarded. The objective of this work was to gather and organize the information available about the potential of using activated charcoal as a bio-adsorbent. Researches were conducted on scientific articles about the production of activated charcoal with adsorption characteristics for the removal of contaminants from residual waters. The efficiency of this technique is dependent on different parameters that affect the adsorption process, such as: pH of the solution, dye initial concentration, contact time, adsorbent amount, and temperature. The articles studied showed that the bio-adsorbent characteristics of charcoals are promising for the removal of pollutants from residual waters. The isotherm adsorption models developed by Langmuir, Freundlich, and Brunauer, Emmett, and Teller (BET) are often used to evaluate the adsorption capacity of activated charcoals. Keywords: industrial effluents; contaminants; environmental management.   Emprego do carvão ativado como bioadsorvente para o tratamento de águas residuais: uma revisão   RESUMO: A adsorção vem ganhando destaque com uma das tecnologias mais empregadas na remoção de contaminantes em águas. No tratamento de efluentes, a adsorção com carvão ativado (CA) apresenta-se como um método eficiente. A principal vantagem da produção de CA é o aproveitamento de resíduos que seriam descartados de forma inadequada. O objetivo desta pesquisa é organizar algumas informações disponíveis com relação ao potencial do carvão ativado como bioadsorvente. Foram realizadas pesquisas em periódicos sobre produção de carvão ativado com características adsortivas na remoção de contaminantes em águas residuais. A eficácia dessa técnica sob diferentes parâmetros influencia no processo de adsorção, tais como: pH da solução, concentração inicial do corante, tempo de contato, quantidade do adsorvente e temperatura. Em todos os artigos estudados, as características dos carvões como bioadsorventes se mostraram promissores no processo para remoção de poluentes em águas residuais. Conclui-se que os modelos de isotermas de adsorção desenvolvidos por Langmuir, Freundlich e BET são frequentemente utilizados para avaliar a capacidade de adsorção dos carvões ativados. Palavras-chave: efluentes industriais; contaminantes; gestão ambiental.

Artificial neural network (ANN) approach for prediction and modeling of breakthrough curve analysis of fixed-bed adsorption of iron ions from aqueous solution by activated carbon from Limonia acidissima shell

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shilpi Das ◽  
Susmita Mishra
Keyword(s):  
Neural Network ◽  
Experimental Data ◽  
Aqueous Solution ◽  
Artificial Neural Network ◽  
Activated Carbon ◽  
Packed Bed ◽  
Initial Concentration ◽  
Bed Height ◽  
Artificial Neural Network Ann ◽  
Limonia Acidissima

Abstract The present research article explored the potential of activated carbon prepared from Limonia acidissima shell to adsorb total Fe ions from aqueous solution in a packed bed up-flow column. The effect of essential factors such as bed height (3–5 cm), initial concentration (30–50 mg/L), and flow rate (3.32–5.4 mL/min) on the performance of the column bed was investigated. The adsorption capacity augmented with an increase in bed height and initial adsorbate concentration but declined with an increase in flow rate. The maximum uptake capacity of 209.6 mg/g was achieved at 5 cm bed height, 3.32 mL/min, and 50 mg/L initial concentration. The bed depth service time (BDST) model was used to analyze the experimental data and determine the characteristic parameters of the packed bed reactor suitable for designing large-scale column studies. The Adams–Bohart, Thomas, and Yoon–Nelson models were applied to the experimental data to predict breakthrough curves using non-linear regression. The artificial neural network (ANN) based model was able to efficaciously predict the column performance using the Levenberg–Marquardt (LM) algorithm. A comparison between the experimental data and model results contributed to a high degree of correlation, specifying that the preliminary information was in good agreement with the ANN predicted data.

Electrosorption Desalination by Activated Carbon Fibers Electrode

2012 ◽  
Vol 610-613 ◽  
pp. 1710-1717
Author(s):  
Gui Zhong Zhou ◽  
Xuan Wang ◽  
Zhao Feng Wang ◽  
Shu Qing Pan ◽  
Shao Xiang Li
Keyword(s):  
Activated Carbon ◽  
Carbon Fibers ◽  
Adsorption Process ◽  
Removal Rate ◽  
Physical Adsorption ◽  
Activated Carbon Fiber ◽  
Activated Carbon Fibers ◽  
Initial Concentration ◽  
Total Adsorption ◽  
Scanning Electron

The activated carbon fiber(ACF) electrodes were prepared for electrosorption desalination. The electrodes were analyzed using scanning electron microscope (SEM), and the desalting efficiency was represented by the removal rate of Cl-. As a result, desalting efficiency decreases with increasing initial concentration of Cl-, whereas the total adsorption capacity increases. The most suitable voltage for electrosorption desalination is 1.2 ~ 1.4V. The electrosorption desalination achieves the best results while the distance between two electrodes is 1.0cm. Electrosorption plays a more important role in the adsorption process compared with physical adsorption. The removal rate of Cl- is obviously improved by using ACF electrode modified by HNO3 and KOH and desalination ratio of the electrode treated with KOH is increased by 16.5%. Therefore, the ACF electrode would be suitable for using in the application of electrosorption desalination.

scholarly journals Adsorption Capabilities of Activated Carbon Derived from Detarium microcarpum Seeds in Removing Co2+ and Pb2+ from Wastewater

2020 ◽  
pp. 167-179
Author(s):  
Ishaq Yahaya Lawan ◽  
Shinggu D. Yamta ◽  
Abdurrahman Hudu ◽  
Kolo Alhaji Madu ◽  
Adamu Mohammad ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Metal Ion ◽  
Adsorption Process ◽  
Ion Concentration ◽  
Adsorption Efficiency ◽  
Cobalt Ions ◽  
Initial Concentration ◽  
Detarium Microcarpum ◽  
Percentage Removal

This study was carried out to evaluate the efficiency of metals (Pb and Co) removal from solution using Detarium microcarpum seeds as adsorbent. The effect of initial concentration and adsorbent dosage on the adsorption process of these metals were studied, the percentage removal of these metals increased with increased in weight (0.5 -2.5g) in 50ml of the solution and the adsorption efficiency increased with increasing initial metal ion concentration (0.01-0.05 moldm−3). The percentage removal obtained for Lead and Cobalt were compared. The result of adsorption were fitted to Langmuir models and coefficients indicated favorable adsorption of Pb2+ and Co2+ ions on the adsorbents. The adsorption of Pb2+ and Co2+ in aqueous solution was in the following order (1400µm>420µm>150µm). More than 55.4% of studied Lead cations were removed by 1400µm, 47.2% by 420µm and 29.8% by 150µm. While for Cobalt cations only 53.2% by 1400µm, 38.6% by 420µm and 24% by 150µm respectively, from aqueous solution it was concluded that, activated Carbon derived from Detarium microcarpum seed is good in removing both lead and cobalt ions, which make it good absorbent.

scholarly journals Models of adsorption of natural contaminants from treated water for municipal purposes on powdered activated carbon

2020 ◽  
pp. 1-14
Author(s):  
Andrzej Bielski
Keyword(s):  
Activated Carbon ◽  
Organic Contaminants ◽  
Adsorption Process ◽  
Wastewater Treatment Plants ◽  
Plug Flow ◽  
General Description ◽  
Flow Reactors ◽  
Adsorption Models ◽  
Model Equations ◽  
Adsorption Rates

The paper investigates whether time and doses of powder activated carbon (PAC) effect adsorption rates of organic contaminants from water and proposes a new model of volume adsorption. Depending on the nature of the organic compounds present in water, a general description of the adsorption process may require a linear combination of adsorption models running at different rates and at different parameters of adsorption isotherms. The model showed a good fit with the measured data and could be used in designing adsorption units at water or wastewater treatment plants. The proposed set of model equations enables to predict the effects of PAC adsorption in both plug flow reactors and homogeneous reactors.

scholarly journals MODIFIED TEA LEAVES RESIDUAL FOR NICOTINE ADSORPTION

2021 ◽  
Vol 40 (3) ◽  
pp. 28-42
Author(s):  
Y. Walid AlBizreh ◽  
rasha Almostafa ◽  
Malak ALJoubbeh
Keyword(s):  
Experimental Data ◽  
Spectral Analysis ◽  
Ir Spectroscopy ◽  
Room Temperature ◽  
Tea Leaves ◽  
Adsorption Models ◽  
Initial Concentration ◽  
Adsorbed Amount ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

The boiled tea leaves residual was modified with oleum of weight 1:1 to prepare an adsorbent that is capable to adsorb nicotine on its surface. The surface properties of the sample were studied by using the FT-IR spectroscopy after each treatment resulting obvious peaks that indicate the modification of the sample with oleum and the adsorption of nicotine on its surface. The concentration of nicotine in the prepared solutions was measured by the use of spectral analysis. The change of nicotine΄s adsorption was studied with the change of time. An increase in the adsorbed amount was noticed until the equilibrium was reached after 24hours. In addition, an increase of the adsorbed amount of nicotine with the increase of its initial concentration was observed at the room temperature. The experimental data corresponded with adsorption models of Langmuir, Freundlish and Temkin, besides, a mechanism of the adsorption of nicotine was suggested to occur with the participation of the two nitrogen atoms.

The Removal of Color from Fuchsin Basic Dye Wastewater Using Activated Carbon

2011 ◽  
Vol 356-360 ◽  
pp. 2616-2619
Author(s):  
Li Yi Ye ◽  
Xiao Xuan Zhang ◽  
Ying Wu Yin ◽  
Song Tu ◽  
Yong Sha
Keyword(s):  
Activated Carbon ◽  
Removal Efficiency ◽  
Adsorption Process ◽  
Color Removal ◽  
Dye Wastewater ◽  
Initial Concentration ◽  
Basic Dye ◽  
Simulated Wastewater

The performance of activated carbon (AC) adsorption process for the treatment of a simulated wastewater of fuchsin basic dye was investigated. The experiment revealed that under the optimum adsorption conditions (initial concentration of wastewater 250 mg L-1of dye, temperature 25 °C and AC dosage 4 g L-1), the color removal efficiency was 98% after 360 min of adsorption. As for the further use of AC, the saturated AC was regenerated by heated 20 min at 600 °C in the atmosphere of N2. Efficiency of regeneration was 99% and the regeneration loss was less than 5%. It indicated that AC was effective in the decolorization of dye wastewater.

Sign in / Sign up

Export Citation Format

Share Document