scholarly journals Kurdistan Native Acorn as Abundant Useless Raw Material to Produce Activated Carbon Adsorbent: Application in Removal of Fe (III) Ion from Aqueous Solutions,Thermodynamic and Kinetic Studies

2017 ◽  
Vol 33 (3) ◽  
pp. 1469-1476
Author(s):  
Asra Alaghebandi ◽  
Bahram Ebrahimi
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Carbon Adsorbent ◽  
Kinetic Studies ◽  
Raw Material

Arsenic(v) removal from aqueous solutions using ferromagnetic activated carbon: equilibrium and kinetic studies

2019 ◽  
Vol 32 (2) ◽  
pp. 179 ◽  
Author(s):  
Yacouba Sanou ◽  
Nguyen Thi Thanh Phuong ◽  
Samuel Pare ◽  
Nguyen Van Phuoc
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Kinetic Studies

scholarly journals Studies on the Removal of Rhodamine B and Malachite Green from Aqueous Solutions by Activated Carbon

2008 ◽  
Vol 5 (4) ◽  
pp. 844-852 ◽  
Author(s):  
A. Edwin Vasu
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Malachite Green ◽  
Rhodamine B ◽  
Kinetic Studies ◽  
Solution Ph ◽  
Carbon Particles ◽  
Rate Determining Step ◽  
High Concentrations ◽  
Hoff Equation

Activated carbon prepared from tamarind fruit shells by direct carbonization was used for the removal of rhodamine B and malachite green dyes from aqueous solutions. Adsorption studies were performed by varying such parameters as dye concentration, pH of the dye solution, time and temperature. The equilibrium adsorption data obtained were used to calculate the Freundlich, Langmuir and Redlich-Peterson isotherm parameters. Increase in pH of the solution pH resulted in increased adsorption of both the dyes. Kinetic studies indicate that the pseudo-second order model can be used for describing the dynamics of the sorption processes. Film diffusion of the dyes was the rate determining step at low dye concentrations while diffusion of dyes through the pores the carbon particles determined the overall uptake at high concentrations. Thermodynamic parameters of the endothermic sorptions were evaluated using van’t Hoff equation. Desorption studies with acids were also performed in order to regenerate the used carbons.

scholarly journals Exploring Adsorption Process of Lead (II) and Chromium (VI) Ions from Aqueous Solutions on Acid Activated Carbon Prepared from Juniperus procera Leaves

Processes ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 217 ◽  
Author(s):  
Ismat H. Ali ◽  
Mohammed K. Al Mesfer ◽  
Mohammad I. Khan ◽  
Mohd Danish ◽  
Majed M. Alghamdi
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Kinetic Studies ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Solution Ph ◽  
Chromium Vi ◽  
Biosorption Process ◽  
Endothermic Process ◽  
Juniperus Procera

The adsorption potential of acid activated carbon prepared from leaves of Juniperus procera to remove Pb(II) and Cr(VI) toxic ions from aqueous solutions was investigated. The effects of solution pH, adsorbent mass, contact time, initial ion concentration and temperature on the biosorption process were studied, and the optimum conditions were determined. Moreover, Langmuir, Freundlich, Temkin and Dubinin–Radushkevich adsorption isotherm models were applied to analyze adsorption data. Thermodynamic parameters for the adsorption processes were calculated. Adsorption was found to be a spontaneous and endothermic process. In addition, kinetic studies revealed a pseudo-first order kinetics biosorption process. The obtained results suggest that acid activated Juniperus procera leaves powder can be used as a cheap, efficient and environmentally friendly adsorbent material with high removal efficiency up to 98% for Pb(II) and 96% for Cr(VI) at 0.80 and 1.00 g/100 mL, respectively. The duration of the process was 100 min and 120 min for Pb(II) and Cr(VI) ions, respectively. The morphology of the of prepared activated carbon was investigated by scanning electron microscope (SEM).

Development and Characterization of a Carbon-Based Composite Material for Reducing Patulin Levels in Apple Juice

2000 ◽  
Vol 63 (1) ◽  
pp. 106-110 ◽  
Author(s):  
H. J. HUEBNER ◽  
K. MAYURA ◽  
L. PALLARONI ◽  
C. L. AKE ◽  
S. L. LEMKE ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Apple Juice ◽  
Fixed Bed ◽  
Carbon Adsorbent ◽  
Breakthrough Capacity ◽  
Bed Porosity ◽  
Fixed Bed Adsorption

Patulin, a heterocyclic lactone produced by various species of Penicillium and Aspergillus fungi, is often detected in apple juices and ciders. Previous research has shown the effectiveness of granular activated carbon for reducing patulin levels in aqueous solutions, apple juices, and ciders. In this study, ultrafine activated carbon was bonded onto granular quartz to produce a composite carbon adsorbent (CCA) with a high carbonaceous surface area, good bed porosity, and increased bulk density. CCA in fixed-bed adsorption columns was evaluated for efficacy in reducing patulin levels from aqueous solutions and apple juice. Columns containing 1.0, 0.5, and 0.25 g of CCA were continuously loaded with a patulin solution (10 μg/ml) and eluted at a flow rate of 1 ml/min. Results indicated that 50% breakthrough capacities for patulin on 1.0-, 0.5-, and 0.25-g CCA columns were 137.5, 38.5, and 19.9 μg, respectively. The effectiveness of CCA to adsorb patulin and prevent toxic effects was confirmed in vitro using adult hydra in culture. Hydra were sensitive to the effects of patulin, with a minimal affective concentration equal to 0.7 μg/ml; CCA adsorption prevented patulin toxicity until 76% breakthrough capacity was achieved. Fixed-bed adsorption with 1.0 g of CCA was also effective in reducing patulin concentrations (20 μg/liter) in a naturally contaminated apple juice, and breakthrough capacities were shown to increase with temperature. Additionally, CCA offered a higher initial breakthrough capacity than pelleted activated carbon when compared in parallel experiments. This study suggests that CCA used in fixed-bed adsorption systems effectively reduced patulin levels in both aqueous solutions and naturally contaminated apple juice; however, the appearance and taste of apple juice may be affected by the treatment process.

scholarly journals Characterisation and Kinetic Studies on Activated Carbon Derived from Rubber Seed Shell for the Removal of Methylene Blue in Aqueous Solutions

2019 ◽  
Vol 30 (2) ◽  
pp. 1-20 ◽  
Author(s):  
Nur Fatin Silmi Mohd Azani ◽  
◽  
Caryn Tan Hui Chuin ◽  
Nor Salmi Abdullah ◽  
Syazrin Syima Sharifuddin ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Aqueous Solutions ◽  
Kinetic Studies ◽  
Rubber Seed

scholarly journals KINETIC STUDIES OF Cu ADSORPTION FROM SASIRANGAN LIQUID WASTE USING RICE HUSK ACTIVATED CARBON

Konversi ◽  
2021 ◽  
Vol 10 (2) ◽  
Author(s):  
Isna Syauqiah ◽  
Desi Nurandini ◽  
Nopi Stiyati Prihatini ◽  
Jamiyaturrasidah Jamiyaturrasidah
Keyword(s):  
Activated Carbon ◽  
Rice Husk ◽  
Adsorption Process ◽  
Chemical Elements ◽  
Chemical Activation ◽  
Liquid Waste ◽  
Carbon Adsorbent ◽  
Aquatic Organisms ◽  
Kinetic Studies ◽  
Physical Activation

The industry of sasirangan – traditional fabric of Banjar Tribe – has been one of prime commodities of South Kalimantan. The coloring process  in sasirangan production used a lot of chemical elements containing heavy metals  and its waste potentially pollute the environment. One of the heavy metal waste contained is copper (Cu) which is toxic to aquatic organisms and humans. The treatment for sasirangan liquid waste can be done by adsorption process using activated carbon as adsorbent. This study aims to determine the appropriate kinetic model for adsorption of Cu metal from sasirangan liquid waste using activated carbon adsorbent made from rice husks.The process was conducted by batch system with chemical and physical activation. Chemical activation was done by soaking the activated carbon of rice husk with HCl solution for 24 hours. While physical activation was carried out by burning in a furnace at 500̊C for 2 hours. The adsorption treatment was given on sasirangan waste samples with variations on contact time (30, 60 and 120 minutes). The results of kinetics study showed that the adsorption process of Cu from sasirangan liquid waste onto rice husk activated carbon adsorbent followed first-order reaction kinetics with a correlation coefficient value (R2) of 0.96 and adsorption rate constant (k1) of 0.0044 min-1.

scholarly journals Study of Date Palm Stem as Raw Material in Preparation of Activated Carbon

2008 ◽  
Vol 5 (1) ◽  
pp. 47 ◽  
Author(s):  
O. Houache ◽  
R. Al-Maamari ◽  
B. Al-Rashidi ◽  
B. Jibril
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Date Palm ◽  
Chemical Activation ◽  
Carbon Adsorbent ◽  
Carbonization Temperature ◽  
Raw Material ◽  
Bet Surface Area ◽  
Palm Tree ◽  
Surface Areas

Activated carbon adsorbent was prepared using Omani date palm tree stem as a precursor. Precursor samples were subjected to thermal treatment (at 400, 500 and 600 oC) before or after impregnation with either H3PO4 (85 wt %) or KOH (3 wt %). The activated carbon obtained was characterized by BET (surface area and porosity), Gas Pycnometry (true density) and SEM (texture). Sample subjected to carbonization, without chemical activation, exhibited low surface areas ~ 1.0 m2/g at 400 and 500 oC and 124 m2/g at 600 oC. Further treatment of such samples with either the acid or the base did not show improvement in surface area or other properties. Impregnations of the precursor with acid before carbonization significantly improved the surface area to as high as 1,100 m2/g at a carbonization temperature of 500 oC. Thus, activated carbon with a moderate surface area could be produced from date palm stem using low carbonization temperature. 

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