scholarly journals Utilization of a novel activated carbon adsorbent from press mud of sugarcane industry for the optimized removal of methyl orange dye in aqueous solution

2019 ◽  
Vol 9 (8) ◽  
Author(s):  
Dominic Justine G. Rondina ◽  
Deanne V. Ymbong ◽  
Macvon Jovy M. Cadutdut ◽  
Jhon Ray S. Nalasa ◽  
Jonas B. Paradero ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Contact Time ◽  
Active Sites ◽  
Adsorption Process ◽  
Carbon Adsorbent ◽  
Press Mud ◽  
Methyl Orange Dye ◽  
Adsorbent Dose ◽  
Sugarcane Industry

Abstract In this study, a novel activated carbon adsorbent from the press mud of a sugarcane industry was used to remove methyl orange dye (MOD) from aqueous solution and was optimized via response surface methodology using the central composite design. The adsorbent was characterized by FTIR and SEM analysis and showed the presence of functional groups such as alcohols, nitriles, amides, alkane, alkyl halides, and alkenes, and it also showed fibrous surface morphological appearance. The factors affecting MOD adsorption, such as initial concentration, adsorbent dose, and contact time were examined, and optimal pH 2.0 to remove MOD in an aqueous solution that is found in various studies is also utilized. The results showed maximum MOD removal rate of 98.68% when the initial concentration, adsorbent dose, and contact time were optimally set as 24.17 mg/L, 0.5 g, and 20 min, respectively. The analysis of the equilibrium data revealed that MOD adsorption using press mud activated carbon best fitted the Langmuir isotherm (R2 = 0.96103) which implies monolayer adsorption process. Also, the kinetics of MOD adsorption using press mud activated carbon followed a pseudo-first-order model (R2 = 0.96096) which means that the active sites are proportional to the non-active sites during the adsorption process.

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 Reductive Adsorption of Chromium(VI) with Activated Carbon

2021 ◽  
Vol 333 ◽  
pp. 04004
Author(s):  
Anh Viet Hoang ◽  
Ya Wen Chen ◽  
Ya-Fen Wang ◽  
Syouhei Nishihama ◽  
Kazuharu Yoshizuka
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Contact Time ◽  
Adsorption Process ◽  
Acidic Ph ◽  
High Adsorption ◽  
Varying Parameters ◽  
High Ph ◽  
Chromium Vi ◽  
Ph Range

Reductive adsorption of chromium (Cr) has been investigated, employing coal-based activated carbon with batchwise study. The adsorption was carried out by varying parameters such as pH of the aqueous solution and contact time. Cr(III) was hardly adsorbed on activated carbon, and it was precipitated at high pH region. High adsorption amounts of Cr(VI) was obtained at pH range 4.5 – 5.5. In the adsorption process, reduction of Cr(VI) to Cr(III) was occurred at especially acidic pH region, and thus most of Cr remained in the aqueous solution in this pH region was Cr(III).

scholarly journals Removal of crystal violate dye from aqueous solution by adsorption on mixture of activated carbon: A kinetic & equilibrium study

2015 ◽  
Vol 11 (9) ◽  
pp. 3876-3887
Author(s):  
Prakash Bhila Wagh ◽  
V.S Shrivastava ◽  
V.S Shrivastava
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Contact Time ◽  
Second Order ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Equilibrium Study ◽  
Pseudo Second Order ◽  
Percentage Removal ◽  
Adsorbent Dose

 The kinetics and equilibrium study of crystal violate dye adsorption on mixture of activated carbon (PWCAC) and (CSAC) was studied. The use of low cost ecofriendly adsorbent has been investigated as an ideal alternative to the current expensive methods of removing of dye from aqueous solution. This study was done by batch adsorption techniques. The quantitative adsorption kinetic and equilibrium parameter for crystal violate dye were studied using uv-visible adsorption spectroscopy. The effect of initial dye concentration, pH,adsorbent dose, temperature, particle size were determined to find the optimal condition for adsorption. The percentage removal of dye was found to be most effective at pH10and contact time 120 min and at an adsorbent dose 4 g/L of dye. The study indicates that’s, the percentage removal of dye increases with increasing initial dye concentration, adsorption dose and contact time and attains equilibrium at optimum conditions.The equilibrium study of adsorption of crystal violate dye on to mixture of activated carbon was investigated using pseudo first order and pseudo second order kinetic models. The adsorption kinetics was found to follow pseudo second order kinetic model. The equilibrium adsorption data of crystal violate dye on PWCAC and CSAC mixture was analyzed by Langmuir and Freundlich adsorption model. The results show that the Langmuir model provides the best correlation.

scholarly journals Experimental and computational studies on activated Bambara groundnut (Vigna subterranean) hulls for the adsorptive removal of herbicides from aqueous solution

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Thomas Aondofa Nyijime ◽  
Abdullahi Muhammad Ayuba ◽  
Habibat Faith Chahul
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Quantum Chemical ◽  
Contact Time ◽  
Adsorption Process ◽  
Bambara Groundnut ◽  
Batch Adsorption ◽  
Computational Studies ◽  
Initial Concentration ◽  
Equilibrium Data

Abstract Background The excessive usage of herbicides to control herbs by farmers has become an issue of interest to the environmentalist due to the threat posed by such act to the ecosystem, and therefore, there is the need to curb such practices. The efficiency of Bambara groundnut shell for the removal of pendimethalin (PE) and paraquat dichloride (PQ) herbicides from aqueous solution was established in this work. The activated carbon was prepared via chemical activation method using trioxonitrate (v) acid by determining its void volume, moisture content, bulk density and Fourier transform infrared (FTIR) and scanning electron microscopy (SEM) methods. Batch adsorption techniques were set to optimize the adsorption parameters such as solution pH, adsorbate concentration, contact time, adsorbent dosage and temperature in order to depict the best optimal conditions for the adsorption process. The adsorption process was examined in terms of its equilibrium data, kinetics, thermodynamics involved in the adsorption process as well as computational quantum chemical parameters evaluation. Results The batch adsorption experiments revealed that the amounts of PE and PQ adsorbed were found to vary with the contact time, adsorbent dosage, pH and initial concentration. The adsorption of PE and PQ decreased with increasing adsorbent dose but increases with increasing initial concentration of the PE and PQ solution. Isotherm studies revealed that the equilibrium data fitted to both Langmuir and Freundlich model with R-squared values of 0.976, 0.993 and 0.909, 0.978 for PE and PQ, respectively, which implied that Langmuir isotherm had a better fit. This was also found to be an indication that the uptake of PE and PQ by ACBGNS occurred through monolayer adsorption on identical homogenous sites. Also, kinetic modeling results obtained showed that the pseudo-second-order model explained the adsorption kinetics of PE and PQ by ACBGNS best, which meant that chemisorption was the slowest step and, thus, the rate determining step. The positive value of ΔH and the positive value of ΔG show the endothermic and spontaneous nature of adsorption of PE and PQ ACBGNS. Conclusion Batch adsorption experiment and characterization of the ACBGNS have indicated that Bambara ground nut shell can be used to produce activated carbon that can be applied effectively for adsorption of PE and PQ from an aqueous solution. Computational studies results obtained from quantum chemical analysis are consistent with the experimental results obtained from this study.

scholarly journals The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Nurul Umairah M. Nizam ◽  
Marlia M. Hanafiah ◽  
Ebrahim Mahmoudi ◽  
Azhar A. Halim ◽  
Abdul Wahab Mohammad
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Active Sites ◽  
Adsorption Process ◽  
Removal Rate ◽  
Cost Effective ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
Rubber Seed ◽  
Morphological Studies

AbstractIn this study, two biomass-based adsorbents were used as new precursors for optimizing synthesis conditions of a cost-effective powdered activated carbon (PAC). The PAC removed dyes from an aqueous solution using carbonization and activation by KOH, NaOH, and H2SO4. The optimum synthesis, activation temperature, time and impregnation ratio, removal rate, and uptake capacity were determined. The optimum PAC was analyzed and characterized using Fourier-transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), a field emission scanning electron microscope (FESEM), Zeta potential, and Raman spectroscopy. Morphological studies showed single-layered planes with highly porous surfaces, especially PAC activated by NaOH and H2SO4. The results showed that the experimental data were well-fitted with a pseudo-second-order model. Based on Langmuir isotherm, the maximum adsorption capacity for removing methylene blue (MB) was 769.23 mg g−1 and 458.43 mg g−1 for congo red (CR). Based on the isotherm models, more than one mechanism was involved in the adsorption process, monolayer for the anionic dye and multilayer for the cationic dye. Elovich and intraparticle diffusion kinetic models showed that rubber seed shells (RSS) has higher α values with a greater tendency to adsorb dyes compared to rubber seed (RS). A thermodynamic study showed that both dyes’ adsorption process was spontaneous and exothermic due to the negative values of the enthalpy (ΔH) and Gibbs free energy (ΔG). The change in removal efficiency of adsorbent for regeneration study was observed in the seventh cycles, with a 3% decline in the CR and 2% decline in MB removal performance. This study showed that the presence of functional groups and active sites on the produced adsorbent (hydroxyl, alkoxy, carboxyl, and π − π) contributed to its considerable affinity for adsorption in dye removal. Therefore, the optimum PAC can serve as efficient and cost-effective adsorbents to remove dyes from industrial wastewater.

scholarly journals Isotherms and Kinetic Studies on the Adsorption of Cd(II) onto Activated Carbon Prepared from Coconut (Cocos nucifera) Shell

2019 ◽  
Vol 40 ◽  
pp. 78-83
Author(s):  
Rajeshwar Man Shrestha ◽  
Sahira Joshi
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Contact Time ◽  
Cocos Nucifera ◽  
Kinetic Studies ◽  
Coconut Shell ◽  
Isotherm Models ◽  
Order Model ◽  
Batch Mode ◽  
Adsorbent Dose

Activated carbon prepared coconut shell using Phosphoric acid as an activating agent was investigated to find the feasibility ofits application for removal of Cd(II) from aqueous solution through the adsorption process. The activated carbon thus prepared has been characterized by SEM, XRD, FTIR. SEM morphology has revealed the pores of different diameters while FTIR showed the presence of surface functional groups such as carboxyl, phenolic and lactones. Batch mode kinetics and isotherm studies were carried out to evaluate the effects of contact time, adsorbent dose and pH. The optimum pH, contact time and adsorbent dose needed for the adsorption of the heavy metal have been found to be 6, 180 minutes and 2 g/L respectively. Langmuir and Freundlich isotherm models have been employed to analyze the adsorption equilibrium data. It was found that the adsorption isotherm of Cd(II) onto the activated carbon was the best described by Langmuir with an adsorption capacity of 33.71 mg/g. Kinetic studies showed that a pseudo second-order model was more suitable than the pseudo first-order model. It has been concluded that the activated carbon prepared from coconut shell can be used as an effective adsorbent for the removal of Cd(II) from aqueous solution.

scholarly journals The Kinetics of the Adsorption Process of Cr (VI) in Aqueous Solution Using Neem Seed Husk (Azadirachta indica) Activated Carbon

2020 ◽  
pp. 1-13
Author(s):  
A. A. Danmallam ◽  
W. L. Dabature ◽  
N. Y. Pindiga ◽  
B. Magaji ◽  
M. A. Aboki ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Adsorption Process ◽  
Neem Seed ◽  
First Order ◽  
Pseudo Second Order ◽  
Seed Husk ◽  
Pseudo First Order ◽  
Kinetics Of ◽  
Adsorbent Dose

The aim of this research is the study of physico-chemical properties activated carbon prepared from agricultural by product such as Neem Seed Husk (NSH) which is abundantly available in our environment The Activated Carbon (AC) was prepared using H3PO4 as activating agent and carbonized at 300°C for two hours. The results shows that the activated process was successful and can compete favorably with commercial activated carbon. The prepared activated carbon was characterized using Fourier Transform Infrared Spectrophotometer (FT-IR), Scanning Electron Microscopy (SEM), Energy Dispersion X-ray (EDX) and Thermogravimetric Analysis (TGA). The percentage removal of Cr(VI) increased with increase in process parameters such as adsorbent dose, time and temperature while there was a decrease with increase in pH and Initial concentration. It was established from the results that activated carbon produced from Neem seed husk has adsorption capacity which could remove 99.75% Cr (VI) at optimum process conditions (pH-2.0, Cr(VI) concentration-10 mg/L, adsorbent dose 0.5 g/L, Temperature 70 c and contact time 30 mins.). Thus, the adsorption method using activated carbon produced from biomass was used effectively for removing Cr(VI) in a stock solution, seems to be an economical and worthwhile alternative over other conventional methods, because of it availability, low price and multi-purposes. The adsorption data fitted well into Freundlich and Langmuir with correlation coefficient (R2) 0.9522 and 0.9403 respectively. The kinetics of the adsorption process was tested through pseudo-first-order and pseudo-second-order models. The pseudo-second-order kinetic model provided the best correlation for with (R2) 0.993, while the pseudo-first-order was found to be 0.928. The study provided an effective use of low-cost activated carbon as a valuable source of adsorbents for the removal of Cr(VI) ions from aqueous solution.

Orthogonal Experiments for Optimizing Adsorption Process of Methyl Orange onto Granular Activated Carbon

2012 ◽  
Vol 610-613 ◽  
pp. 1639-1644
Author(s):  
Wei Fang Dong ◽  
Li Hua Zang ◽  
Qi Lei Feng
Keyword(s):  
Activated Carbon ◽  
Methyl Orange ◽  
Removal Efficiency ◽  
Contact Time ◽  
Adsorption Process ◽  
Granular Activated Carbon ◽  
Optimum Time ◽  
Orthogonal Experiments ◽  
Methyl Orange Dye ◽  
Influence Degree

This study investigated the treatment of methyl orange dye from aqueous solution with granular activated carbon as sorbents. Adsorption experiments were carried out at different contact time, the dosage of granular activated carbon, pH and initial dye concentration.Orthogonal experiment was designed to analyze the influence degree of operating parameters for optimizing adsorption process. The results demonstrated that the dosage of granular activated carbon had the greatest impact on the removal efficiency of methyl orange , followed by pH, contact time and initial concentration of methyl orange . The granular activated carbon possessed good adsorption capacity to methyl orange which the removal efficiency could reached 98.06% at the optimum dosage 4g and optimum time 90min.

scholarly journals Removal of crystal violate dye from aqueous solution by adsorption on mixture of activated carbon: A kinetic & equilibrium study

2015 ◽  
Vol 11 (9) ◽  
pp. 3876-3887
Author(s):  
Prakash Bhila Wagh ◽  
V.S Shrivastava ◽  
V.S Shrivastava
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Contact Time ◽  
Second Order ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Equilibrium Study ◽  
Pseudo Second Order ◽  
Percentage Removal ◽  
Adsorbent Dose

 The kinetics and equilibrium study of crystal violate dye adsorption on mixture of activated carbon (PWCAC) and (CSAC) was studied. The use of low cost ecofriendly adsorbent has been investigated as an ideal alternative to the current expensive methods of removing of dye from aqueous solution. This study was done by batch adsorption techniques. The quantitative adsorption kinetic and equilibrium parameter for crystal violate dye were studied using uv-visible adsorption spectroscopy. The effect of initial dye concentration, pH,adsorbent dose, temperature, particle size were determined to find the optimal condition for adsorption. The percentage removal of dye was found to be most effective at pH10and contact time 120 min and at an adsorbent dose 4 g/L of dye. The study indicates that’s, the percentage removal of dye increases with increasing initial dye concentration, adsorption dose and contact time and attains equilibrium at optimum conditions.The equilibrium study of adsorption of crystal violate dye on to mixture of activated carbon was investigated using pseudo first order and pseudo second order kinetic models. The adsorption kinetics was found to follow pseudo second order kinetic model. The equilibrium adsorption data of crystal violate dye on PWCAC and CSAC mixture was analyzed by Langmuir and Freundlich adsorption model. The results show that the Langmuir model provides the best correlation.

Removal of Fe (II) from Aqueous Solution by Chitosan Activated Carbon Composite Beads

2020 ◽  
Vol 898 ◽  
pp. 3-8
Author(s):  
Putri Wulan ◽  
Yuni Kusumastuti ◽  
Agus Prasetya
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Metal Ion ◽  
Adsorption Process ◽  
Chitosan Solution ◽  
Carbon Composite ◽  
Composite Beads ◽  
Naoh Solution ◽  
Adsorbent Dose

The high levels of Fe2+ metal ion in water can be reduced by adsorption process. The adsorbent used is a composite of chitosan activated carbon. The composites were prepared by adding 1.5 g of activated carbon into chitosan solution 1.5% (w/v). The gels of chitosan activated carbon were then dropped into a 2.8% NaOH solution mixture to produce composite beads. The beads were neutralized using aquadest and dried in an oven at 50oC for 2 hours. The dried bead was used as adsorbent. The adsorption process was carried out with erlenmeyer in shaker bath with 0.5 g, 1 g, and 1.5 g at 25oC, 35oC and 45oC in 50 mL solution of Fe2+ metal ion having concentration of 10 ppm. Sample were taken in 5, 10, 20, 40 60, 80 and 120 min. Adsorbent were characterized by SEM and EDX. The composite beads adsorbent was analyzed by SEM and EDX. SEM results show that chitosan was successfully coated on activated carbon with a porous surface structure. The EDX results show that chitosan activated carbon composite beads can absorb Fe2+ metal ions, with an adsorption capacity of 88.3% at 60 min in 1.5 g adsorbent dose.

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