scholarly journals Activated carbon blended with grape stalks powder: Properties modification and its application in a dye adsorption

2020 ◽  
Vol 13 (5) ◽  
pp. 5463-5473 ◽  
Author(s):  
Reza Davarnejad ◽  
Saeedeh Afshar ◽  
Parisa Etehadfar
Keyword(s):  
Activated Carbon ◽  
Dye Adsorption ◽  
Powder Properties ◽  
Grape Stalks

Basic dye adsorption on activated carbon

1979 ◽  
Vol 12 (3) ◽  
pp. 307-317 ◽  
Author(s):  
Gordon McKay
Keyword(s):  
Activated Carbon ◽  
Dye Adsorption ◽  
Basic Dye

scholarly journals Microporous activated carbon developed from KOH activated biomass waste: surface mechanistic study of methylene blue dye adsorption

2021 ◽  
Author(s):  
Ali H. Jawad ◽  
Ahmed Saud Abdulhameed ◽  
Noor Nazihah Bahrudin ◽  
Nurul Nadiah Mohd Firdaus Hum ◽  
S. N. Surip ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Surface Area ◽  
Sugarcane Bagasse ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
Type I ◽  
Order Kinetic ◽  
Bagasse Waste

Abstract In this work, sugarcane bagasse waste (SBW) was used as a lignocellulosic precursor to develop a high surface area activated carbon (AC) by thermal treatment of the SBW impregnated with KOH. This sugarcane bagasse waste activated carbon (SBWAC) was characterized by means of crystallinity, porosity, surface morphology and functional groups availability. The SBWAC exhibited Type I isotherm which corresponds to microporosity with high specific surface area of 709.3 m2/g and 6.6 nm of mean pore diameter. Further application of SBWAC as an adsorbent for methylene blue (MB) dye removal demonstrated that the adsorption process closely followed the pseudo-second order kinetic and Freundlich isotherm models. On the other hand, thermodynamic study revealed the endothermic nature and spontaneity of MB dye adsorption on SBWAC with high acquired adsorption capacity (136.5 mg/g). The MB dye adsorption onto SBWAC possibly involved electrostatic interaction, H-bonding and π-π interaction. This work demonstrates SBW as a potential lignocellulosic precursor to produce high surface area AC that can potentially remove more cationic dyes from the aqueous environment.

scholarly journals Adsorption of Textile Dye by Activated Carbon Made from Rice Straw and Oil Palm Midrib

2017 ◽  
Vol 6 (1) ◽  
pp. 1 ◽  
Author(s):  
Mochamad Lutfi Firdaus ◽  
Noli Krisnanto ◽  
Wiwit Alwi ◽  
Ronald Muhammad ◽  
Muhamad Allan Serunting
Keyword(s):  
Activated Carbon ◽  
Rice Straw ◽  
Adsorption Isotherms ◽  
Oil Palm ◽  
Dye Adsorption ◽  
Textile Dye ◽  
Synthetic Dyes ◽  
Potential Hazard ◽  
Synthetic Dye ◽  
Langmuir And Freundlich Models

Synthetic dye wastewater from textile industries is characterized by strong color, high temperature, variable pH and high chemical oxygen demand (COD). The strong color of wastewater affects aesthetic and water transparency of water bodies. The metabolites could be toxic to aquatic biota and posing a potential hazard to human health. Eventually, it will cause severe environmental problems. One of method that has advantages in term of simplicity to remove synthetic dyes is adsorption. Environmentally benign and low-cost materials to make adsorbent are biomass-based materials. Two different biomaterial wastes of rice straw and oil palm midrib were used in this study to develop activated carbon adsorbents. These adsorbents were applied for the removal of Naphtol AS-G dye in aqueous solution. The effects of solution pH, adsorbents masses and contact time on dye adsorption were evaluated based on batch experiments. Removal of dye can be achieved within 60 minutes at a wide pH range starting from 4 to 8. At lower pH, synthetic dye removal was decreasing probably due to protonation of adsorbent’s active sites. The adsorption isotherms based on Langmuir and Freundlich models were analyzed. The isotherms analysis indicated that the adsorption by rice straw and oil palm can be represented by Langmuir and Freundlich isotherm model, respectively. Adsorption isotherms of Naphtol AS-G onto activated carbon are favorable with high adsorption capacity for both biomaterials. The mechanisms of color removal by activated carbon involved chemical and physical adsorption, in accordance with both the Langmuir and Freundlich models. The calculated maximum dye adsorption capacities onto rice straw and oil palm midrib activated carbon were 55.86 and 69.44 mg/g, respectively. Adsorption using biomass-based activated carbon offers a good technique for textile wastewater treatment as it could remove up to 95% of the color intensity besides reducing other pollutants such as COD, nitrate and phosphate. 

scholarly journals Modeling the removal of Reactive Red 120 dye from aqueous effluents by activated carbon

2020 ◽  
Vol 82 (4) ◽  
pp. 651-662
Author(s):  
Kods Oueslati ◽  
Eder C. Lima ◽  
Fakher Ayachi ◽  
Mariene R. Cunha ◽  
Abdelmottaleb Ben Lamine
Keyword(s):  
Activated Carbon ◽  
Adsorption Isotherms ◽  
Statistical Physics ◽  
Adsorption Process ◽  
Dye Adsorption ◽  
Physical Nature ◽  
Experimental Conditions ◽  
Reactive Red 120 ◽  
Receptor Sites ◽  
Aqueous Effluents

Abstract The adsorption isotherms of Reactive Red 120 (RR-120) on Brazilian pine-fruit shell activated carbon, at six temperatures (298, 303, 308, 313, 318 and 323 K) and pH = 6, were determined and interpreted using a double layer model with one energy. A statistical physics treatment established the formulation of this model. Steric and energetic parameters related to the adsorption process, such as the number of adsorbed molecules per site, the receptor sites density and the concentration at half-saturation, have been considered. Thermodynamic potential functions such as entropy, internal energy and Gibbs free enthalpy are analyzed, and the choice of the models is based on assumptions in correlation with experimental conditions. By numerical fitting, the investigated parameters were deduced. The theoretical expressions provide a good understanding and interpretation of the adsorption isotherms at the microscopic level. We believe that our work contributes to new theoretical insights on the dye adsorption in order to know the physical nature of the adsorption process.

scholarly journals Broadening the pore size of coal-based activated carbonviaa washing-free chem-physical activation method for high-capacity dye adsorption

RSC Advances ◽  
2018 ◽  
Vol 8 (26) ◽  
pp. 14488-14499 ◽  
Author(s):  
Longxin Li ◽  
Fei Sun ◽  
Jihui Gao ◽  
Lijie Wang ◽  
Xinxin Pi ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Pore Size Distribution ◽  
Pore Size ◽  
High Capacity ◽  
Dye Adsorption ◽  
High Rate ◽  
Physical Activation ◽  
Size Distributions ◽  
Pore Size Distributions ◽  
New Type

Aiming to overcome the limitations of the narrow pore size distributions of traditional activated carbon, we demonstrate a new type of activated carbon with a broadened pore size distribution for high-rate and high-capacity aqueous dye adsorption.

Coupling ultrafiltration and adsorption onto activated carbon cloth: application to the treatment of highly coloured wastewaters

2000 ◽  
Vol 42 (5-6) ◽  
pp. 355-362 ◽  
Author(s):  
H. Pignon ◽  
C. Brasquet ◽  
P. Le Cloirec
Keyword(s):  
Molecular Weight ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Membrane Filtration ◽  
Flow Reactor ◽  
Great Influence ◽  
Dye Adsorption ◽  
Operating Conditions ◽  
Carbon Cloth ◽  
Kinetics And Isotherms

The aim of this work is to evaluate the efficiency of Activated Carbon Cloths (ACCs) as a refining treatment of membrane filtration in the case of effluent streams containing both dyes and suspended solids (SS) or colloids responsible for turbidity. It is divided into two parts. First, dye adsorption experiments are carried out. Kinetics and isotherms enable us to show the feasibility of the adsorption and to study the influence of different operating conditions. The results demonstrate that adsorption is enhanced under acidic conditions, the adsorption capacity being increased by 40% in some cases. Moreover, microscopic characteristics of ACCs have a great influence on the adsorption process: there is a relationship between the adsorbent porosity and the adsorbate molecular weight, the mesoporous adsorbent being more efficious to remove the larger molecular weight dyes. In the case of low molecular weight compounds, the adsorbent with the higher specific surface area provides the greater adsorption capacity. Molecular connectivity indexes were used to confirm the correlation of the molecular structure of the adsorbates with their adsorbability. The second part consists of an estimation of the efficiency of the coupling of ultrafiltration and adsorption onto ACC. Tests performed on a laboratory-scale coupling show that a molecular weight cut-off of 3,000 D gives rise to a 98% removal of turbidity whereas dyes are not much retained. Furthermore, ultrafiltration is useful in improving the adsorption capacities of ACC in a continuous flow reactor (up to 50%).

scholarly journals New Activated Carbon from Mine Coal for Adsorption of Dye in Simulated Water or Multiple Heavy Metals in Real Wastewater

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2498 ◽  
Author(s):  
Marwa Elkady ◽  
Hassan Shokry ◽  
Hesham Hamad
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Metal Ions ◽  
Low Cost ◽  
Dye Adsorption ◽  
Chemical Properties ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Physico Chemical ◽  
Multiple Heavy Metals

Nano-activated carbon (NAC) prepared from El-Maghara mine coal were modified with nitric acid solution. Their physico-chemical properties were investigated in terms of methylene blue (MB) adsorption, FTIR, and metal adsorption. Upon oxidation of the ACS with nitric acid, surface oxide groups were observed in the FTIR spectra by absorption peaks at 1750–1250 cm−1. The optimum processes parameters include HNO3/AC ratio (wt./wt.) of 20, oxidation time of 2 h, and the concentration of HNO3 of 10% reaching the maximum adsorption capacity of MB dye. Also, the prepared NAC was characterized by SEM, EDX, TEM, Raman Spectroscopy, and BET analyses. The batch adsorption of MB dye from solution was used for monitoring the behavior of the most proper produced NAC. Equilibrium isotherms of MB dye adsorption on NAC materials were acquired and the results discussed in relation to their surface chemistry. Langmuir model recorded the best interpretation of the dye adsorption data. Also, NAC was evaluated for simultaneous adsorption of six different metal ions (Fe2+, Ni2+, Mn2+, Pb2+, Cu2+, and Zn2+) that represented contaminates in petrochemical industrial wastewater. The results indicated that the extracted NAC from El-Maghara mine coal is considered as an efficient low-cost adsorbent material for remediation in both basic dyes and metal ions from the polluted solutions.

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