scholarly journals Scavenging malachite green dye from aqueous solution using durian peel based activated carbon

2021 ◽  
Vol 17 (1) ◽  
pp. 95-103
Author(s):  
Mohamad Firdaus Mohamad Yusop ◽  
Mohd Azmier Ahmad ◽  
Nur Ayshah Rosli ◽  
Fadzil Noor Gonawan ◽  
Soran Jalal Abdullah
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Malachite Green ◽  
Diffusion Mechanism ◽  
Freundlich Isotherm ◽  
Bet Surface Area ◽  
Solution Temperature ◽  
Mechanism Study ◽  
Solution Ph ◽  
Malachite Green Dye

Physiochemical activation consists of heat treatment coupling with CO2 gasification and KOH chemical treatment were applied in preparing durian peel based activated carbon (DPAC) to remove basic dye, malachite green (MG) from aqueous solution. Several parameters namely, effect of initial MG concentration as well as contact time, solution temperature and initial solution pH were carried out in this study. Characterization study revealed that DPAC pose high BET surface area which is 886.31 m2/g and its surface was found to be mesoporous in nature with heterogeneous type of pore structures. Eight isotherms and four kinetic models were utilized and it was revealed that the adsorpttion system followed Freundlich isotherm and pseudo-first order (PFO) kinetic model. Mechanism study using intraparticle diffusion and Boyd plot confirmed that adsorption of MG onto DPAC was controlled by the film-diffusion mechanism. Thermodynamic study indicated that the adsorption system was exothermic, spontaneous, feasible and governed by physical-type of adsorption.

Adsorption of Malachite Green on Heishan Coal-Based Activated Carbon

2011 ◽  
Vol 396-398 ◽  
pp. 2384-2387
Author(s):  
Mao Sheng Tao ◽  
De Lian Yi ◽  
Lin Wu ◽  
Zhao Hui Ouyang ◽  
Hui Min Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Malachite Green ◽  
Chemical Activation ◽  
Freundlich Isotherm ◽  
Bet Surface Area ◽  
Sem Image ◽  
Effects Of Ph ◽  
Equilibrium Data ◽  
Adsorption Equilibrium Data

Subscript textAn adsorbent has been prepared from Heishan coal by chemical activation with KOH, the activated carbon has a BET surface area of 801.53 m2/g, the meso-pore ratio is 89.63%, SEM image shows that it is very rich in pore structure. The activated carbon was used to adsorb malachite green from an aqueous solution in room temperature. The effects of pH, contact time and dosage have been studied. The results show that the adsorption of malachite green from aqueous solution onto Heishan coal-based activated carbon proceeds according to the pseudo-second-order model, the adsorption equilibrium data were better represented by the Langmuir isotherm than Freundlich isotherm.

scholarly journals Characteristics and adsorption study of the activated carbon derived from municipal sewage sludge

2017 ◽  
Vol 76 (7) ◽  
pp. 1697-1705 ◽  
Author(s):  
Tiecheng Guo ◽  
Sicong Yao ◽  
Hengli Chen ◽  
Xin Yu ◽  
Meicheng Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Sewage Sludge ◽  
Removal Rate ◽  
Freundlich Isotherm ◽  
Bet Surface Area ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Isotherm Models ◽  
Adsorptive Capacity ◽  
Solution Ph

Sewage sludge-based activated carbon is proved to be an efficient and low-cost adsorbent in treatment of various industrial wastewaters. The produced carbon had a well-developed pore structure and relatively low Brunauer–Emmett–Teller (BET) surface area. Adsorptive capacity of typical pollutants, i.e. copper Cu(II) and methylene blue (MB) on the carbon was studied. Adsorptions were affected by the initial solution pH, contact time and adsorbent dose. Results showed that adsorption of Cu(II) and MB on the produced carbon could reach equilibrium after 240 min. The average removal rate for Cu(II) on the carbon was high, up to 97% in weak acidic conditions (pH = 4–6) and around 98% for MB in a very wide pH range (pH = 2–12). The adsorption kinetics were well fitted by the pseudo-second order model, and both Langmuir and Freundlich isotherm models could well describe the adsorption process at room temperature. The theoretical maximum adsorption capacities of Cu(II) and MB on sewage sludge-based activated carbon were 114.94 mg/g and 125 mg/g, respectively. Compared with commercial carbon, the sewage sludge-based carbon was more suitable for heavy metal ions’ removal than dyes’.

scholarly journals Biosorption Studies for the Removal of Malachite Green from its Aqueous Solution by Activated Carbon Prepared from Cassava Peel

2011 ◽  
Vol 8 (s1) ◽  
pp. S61-S66 ◽  
Author(s):  
C. Parvathi ◽  
T. Maruthavanan ◽  
S. Sivamani ◽  
C. Prakash
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Malachite Green ◽  
Dye Removal ◽  
Agricultural Waste ◽  
Raw Material ◽  
Textile Effluent ◽  
Malachite Green Dye ◽  
Health Related ◽  
Cassava Peel

The association of dyes with health related problems is not a new phenomenon. The effectiveness of carbon adsorption for dye removal from textile effluent has made it an ideal alternative to other expensive treatment methods. The preparation of activated carbon from agricultural waste could increase economic return and reduce pollution. Cassava peel has been used as a raw material to produce activated carbon. The study investigates the removal of malachite green dye from its aqueous solution. The effects of condition such as adsorbent dosage, initial dye concentration, pH and contact time were studied. The adsorption capacity was demonstrated as a function of time for malachite green from aqueous solution by the prepared activated carbon. The results showed that as the amount of the adsorbent was increased, the percentage of dye removal increased accordingly. Higher adsorption percentages were observed at lower concentrations of malachite green dye. Silver nitrate treated cassava peel showed a better performance compared to Sulphuric acid treated and raw carbons, thus making it an interesting option for dye removal textile effluent.

Modification of granular activated carbon using low molecular weight polymer for enhanced removal of Cu2 +  from aqueous solution

2007 ◽  
Vol 56 (9) ◽  
pp. 95-101 ◽  
Author(s):  
C.Y. Yin ◽  
M.K. Aroua ◽  
W.M.A.W. Daud
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Freundlich Isotherm ◽  
Initial Solution ◽  
Batch Adsorption ◽  
Solution Ph ◽  
Molecular Weight Polymer ◽  
Adsorption Capacities ◽  
Surface Impregnation ◽  
Better Than

Palm shell activated carbon was modified via surface impregnation with polyethyleneimine (PEI) to enhance removal of Cu2 +  from aqueous solution in this study. The effect of PEI modification on batch adsorption of Cu2 +  as well as the equilibrium behavior of adsorption of metal ions on activated carbon were investigated. PEI modification clearly increased the Cu2 +  adsorption capacities by 68% and 75.86% for initial solution pH of 3 and 5 respectively. The adsorption data of Cu2 +  on both virgin and PEI-modified AC for both initial solution pH of 3 and 5 fitted the Langmuir and Redlich–Peterson isotherms considerably better than the Freundlich isotherm.

scholarly journals Adsorption Kinetics of Malachite Green Dye Removal from Aqueous Solution by using Banana Stem

2021 ◽  
Vol 10 (5) ◽  
pp. 215-220
Author(s):  
K Arun Kumar ◽  
Sandeep. S,
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Malachite Green ◽  
Dye Removal ◽  
Agricultural Waste ◽  
Research Work ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
Malachite Green Dye ◽  
Banana Stem

This research work goals at searching the effectiveness of Malachite Green dye removal using banana stem, an agricultural waste as an activated carbon. The banana stem activated carbon was made ready in the laboratory by carbonization followed by activation. Adsorption studies were carried out to check the effect of various experimental conditions like different pH values, varying contact time, initial concentration of dye and changing banana stem carbon dosage on the removal of Malachite Green dye from aqueous solution at constant Temperature and agitation speed. The equilibrium experimental data were used for applicability of Langmuir and Freundlich isotherm models and the kinetic models. Batch test showed that maximum of 99% of dye was removed when the dye concentration was 2 mg/L, at an adsorbent dose of 0.75 gm/L at dye pH 8 in 45 minutes. From the obtained results it is validated that the equilibrium data’s favorable for both Freundlich and Langmuir isotherms. Maximum adsorption capacity of banana stem carbon on malachite green dye was found to be 8.29 mg/g. It was prevailing that the adsorption process followed the pseudo-second-order rate kinetics. It was observed that intra particle diffusion is not the only rate-limiting step in this adsorption system but also regression results indicate that the linear regression model gives the best results. The above observations recommend that Banana stem carbon can be competently implemented for removal of malachite green dye from aqueous solution in the adsorption treatment processes.

scholarly journals Activated carbon from mustard stalk biomass: Synthesis, characterization and application in wastewater treatment

2021 ◽  
pp. 10-10
Author(s):  
Kalpana Patidar ◽  
Manish Vashishtha
Keyword(s):  
Activated Carbon ◽  
Chemical Activation ◽  
Total Pore Volume ◽  
Freundlich Isotherm ◽  
Bet Surface Area ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
Solution Ph ◽  
Isotherm Study ◽  
Adsorption Rates

Present work is focused on the preparation of mustard stalk activated carbon (MSAC) using chemical activation with H3PO4 and exploring its properties for its use in dye removal from wastewater. Adsorption variable (dosage, contact time, and solution pH), pore structure, morphology, surface functional groups, equilibrium kinetics, and isotherm study for removal of methylene blue (MB) using MSAC were investigated. The present study showed that an adsorption dosage of 0.2 g L-1 and pH 8 can be considered as optimum for the MB removal. SEM result showed that pore of MSAC was larger than the pore of the mustard stalk (MS). BET surface area and total pore volume of MSAC were found as 510 m2 g-1 and 0.33 cm3 g-1, respectively. Equilibrium adsorption data were examined by Langmuir and Freundlich isotherm models. Better correspondence to the Langmuir model with a maximum adsorption capacity of 212.76 mg g-1 (MB onto MSAC) was obtained. Dimensionless factor, RL revealed favourable nature of the sorption in the MSAC - MB system. Adsorption rates were found to conform to the pseudo-second-order kinetics with good correlation. These results show that the MSAC could be used as a renewable and economical alternative to commercial AC in the removal of MB dye from wastewater.

scholarly journals Coconut shell derived ZnCl2 activated carbon for malachite green dye removal

2021 ◽  
Author(s):  
R. Sangeetha piriya ◽  
Rajamani M. Jayabalakrishnan ◽  
M. Maheswari ◽  
Kovilpillai Boomiraj ◽  
Sadish Oumabady
Keyword(s):  
Activated Carbon ◽  
Malachite Green ◽  
Zinc Chloride ◽  
Dye Removal ◽  
Dye Adsorption ◽  
Freundlich Isotherm ◽  
Industrial Effluents ◽  
Intraparticle Diffusion Model ◽  
Malachite Green Dye ◽  
The Impact

Abstract The coconut-based agricultural wastes have gained wide attention as an alternative adsorbent for the removal of diverse pollutants from the industrial effluents. This paper presents the zinc chloride activation of adsorbent carbon and the utilization as an adsorbent for the removal of malachite green dye from aqueous solution. The characterisation of activated carbon was performed to get an insight into the adsorption mechanism. The ZnCl2 activated carbon acquired a higher specific surface area (544.66 m2 g−1) and stability (−32.6 mV). The impact of process parameters including contact time (20–220 min) and initial dye concentration (20–80 mg L−1) were evaluated on the effectiveness of activated carbon for dye removal. The results concluded that zinc chloride activated carbon showed a significant dye adsorption (39.683 mg g−1) at an initial concentration of 20 mg L−1 after 3 hours. Based on the correlation coefficient (R2), the Freundlich isotherm model (0.978–0.998) was best fitted for the experimental data followed by the intraparticle diffusion model (0.88–0.929) as the most appropriate model for malachite green dye removal. Additionally, the energy and thermogravimetric analysis portrayed the suitability of the carbon material to be used as an energy alternative to coal.

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