Statistical analysis on the removal of malachite green dye using active carbons of Achyranthes aspera and Allamanda blanchetii plants

Abstract Activated carbons were prepared from the stem parts of Achyranthes aspera and Allamanda blanchetii plants and were investigated as adsorbents for the removal of malachite green dye from contaminated water. Various extraction conditions such as pH, initial concentration of dye, adsorbent dosage, temperature, agitation time and presence of co-ions were optimized for the maximum possible extraction of the dye. For analyzing the combined effect of these parameters on the removal efficiency of the adsorbents, statistical optimization modelling was adopted. The adsorbents developed were characterized and the adsorption abilities were observed to be 40.0 mg/g and 53.0 mg/g for the active carbons of Achyranthes aspera and Allamanda blanchetii plants respectively. The mechanism of adsorption was studied using various isotherm models and it was found that the Freundlich model describes well the adsorption process. Thermodynamic studies revealed the endothermic and spontaneous nature of physisorption. The kinetics of adsorption were well defined by the pseudo-second-order model. Desorption and regeneration studies of the spent adsorbents indicated that the percentage of extraction has not come down below 80.0% even after five regenerations for both the adsorbents. The validity of the methods developed are tested with real dye-polluted industrial effluent samples.

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Zeolites in Phenol Removal in the Presence of Cu(II) Ions—Comparison of Sorption Properties after Chitosan Modification

Materials ◽

10.3390/ma13030643 ◽

2020 ◽

Vol 13 (3) ◽

pp. 643 ◽

Cited By ~ 4

Author(s):

Lidia Bandura ◽

Małgorzata Franus ◽

Jarosław Madej ◽

Dorota Kołodyńska ◽

Zbigniew Hubicki

Keyword(s):

Nitrogen Adsorption ◽

Isotherm Models ◽

Phenol Removal ◽

Experimental Conditions ◽

Kinetics Of Adsorption ◽

Initial Concentration ◽

Pseudo Second Order ◽

Ft Ir ◽

Adsorption Desorption ◽

Kinetics Of

Nowadays, the contamination of water with phenol is a serious environmental problem. This compound occurs very often with heavy metal ions which makes purification of water even more difficult. This article presents the problem of the removal of phenol from aqueous solutions in the presence of Cu(II) ions on synthetic zeolite NaP1 and zeolite NaP1 modified with chitosan. The adsorbents were determined with the use of Fourier transform infrared spectroscopy (FT-IR), nitrogen adsorption/desorption isotherm, and scanning electron microscopy (SEM). The studies on isotherms and batch kinetics under diversified experimental conditions with respect to initial concentration, contact time, and pH were discussed. Both Cu(II) and phenol adsorption increases with the initial concentration. Different isotherm models correspond well with the data acquired through experiments. The kinetics of adsorption follows the pseudo-second order rate equation. The studies indicate that the obtained sorbents can be employed for efficient removal of phenol from wastewater in the presence of Cu(II) ions.

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Malachite Green Dye Removal Using the Seaweed Enteromorpha

E-Journal of Chemistry ◽

10.1155/2011/141305 ◽

2011 ◽

Vol 8 (2) ◽

pp. 649-656 ◽

Cited By ~ 5

Author(s):

R. Jayaraj ◽

M. Chandra Mohan ◽

P. Martin Deva Prasath ◽

T. Hidhayathullah Khan

Keyword(s):

Aqueous Solution ◽

Malachite Green ◽

Freundlich Isotherm ◽

Isotherm Models ◽

Batch Adsorption ◽

Model Parameters ◽

Adsorption Method ◽

Malachite Green Dye ◽

Equilibrium Data ◽

Pseudo Second Order

Malachite green adsorption from an aqueous solution onto activatedEnteromorphacarbon has been studied experimentally using batch adsorption method. Adsorption kinetics and equilibrium were investigated as a function of initial dye concentration, pH, contact time and adsorbent dosage. Kinetics studies indicated that the adsorption followed pseudo second order reaction. Equilibrium data was analyzed using Langmuir and Freundlich isotherm models. The adsorption capacity ofEnteromorphawas found to be 94.74%. On the basis of experimental results and the model parameters, it can be inferred that the carbonaceousEnteromorphais effective for the removal of malachite green from aqueous solution.

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Effective Activated Carbon as Adsorbent for the Removal of Copper(II) Ions from Wastewater

Asian Journal of Chemistry ◽

10.14233/ajchem.2019.22115 ◽

2019 ◽

Vol 31 (10) ◽

pp. 2233-2239 ◽

Cited By ~ 1

Author(s):

Patra Vasundhara Devi ◽

M. Suneetha ◽

K. Ravindhranath

Keyword(s):

Water Samples ◽

Activated Carbons ◽

Freundlich Isotherm ◽

Hibiscus Cannabinus ◽

Isotherm Models ◽

Kinetics Of Adsorption ◽

Adsorption Processes ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

Ph Range

Nitric acid activated carbons prepared from the barks of Limonia acidissima plant (NALABC) and stems of Hibiscus cannabinus plant (NAHCSC) are investigated as adsorbents for the removal of Cu(II) ions from waste water using batch methods of extraction. Various extraction conditions namely, pH, time of equilibration, sorbent concentration, initial concentration of Cu(II) ions and temperature, are optimized for the maximum removal. Substantial amounts of Cu(II) are extracted in the pH range: 3 to 9 and adsorption capacities are 19.6 mg/g for NALABC and 29.4 mg/g for NAHCSC, which are more than many active carbons developed in the previous works. It is interesting to note that the adsorbents are effective in acidic, neutral and also in basic conditions of the water samples and thus paving the way for applying these adsorbents in wide pH ranges of diverse samples. Five-fold excess of common co-ions that are normally present in water, have marginally affected the % removal. Thermodynamic parameters are evaluated for the spontaneity and nature of adsorption processes. The adsorption phenomenon is analyzed using Langmuir and Freundlich isotherm models and noted that Langmuir isotherm model suits better indicating the uniform and mono-layer nature of adsorption. Kinetics of adsorption is analyzed and found that pseudo second-order kinetics preferably explains the adsorption of Cu(II). The spent NALABC and NAHCSC can be regenerated and subsequently used. The adsorbents developed are found to be effective in removing Cu(II) ions from the real water samples collected from polluted lakes and copper based industries.

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Biosorption and Diffusion Modeling of Pb(II) by Malt Bagasse

International Journal of Chemical Engineering ◽

10.1155/2016/4210561 ◽

2016 ◽

Vol 2016 ◽

pp. 1-11 ◽

Cited By ~ 4

Author(s):

Klaiani B. Fontana ◽

Giane Gonçalves Lenzi ◽

Erica R. L. R. Watanabe ◽

Ervin Kaminski Lenzi ◽

Juliana A. M. T. Pietrobelli ◽

...

Keyword(s):

Sorption Process ◽

Isotherm Models ◽

Diffusion Modeling ◽

Biosorption Capacity ◽

Kinetic And Thermodynamic Parameters ◽

Pseudo Second Order ◽

Ph Optimization ◽

Kinetics Of ◽

And Diffusion

The removal of Pb(II) from water by biosorption processes onto malt bagasse was investigated and the kinetic and thermodynamic parameters were obtained; additionally a diffusion modeling was proposed. The characterization of malt bagasse was performed by FTIR and SEM/EDS. The experiments were conducted in batch system and an experimental design based response surface methodology was applied for agitation speed and pH optimization. The kinetics of biosorption followed pseudo-second-order model and the temperature of the process affected the biosorption capacity. Isotherm models of Langmuir, Freundlich, and Elovich were applied and the Langmuir model showed better fit and the estimated biosorption capacity was 29.1 mg g−1. The negative values obtained for ΔG° and positive values of ΔH° confirm, respectively, the spontaneous and endothermic nature of the process. The diffusion modeling was performed based on experiments in the absence of agitation to investigate the influence of the biosorbent on the sorption process of Pb(II) ions.

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Study of the adsorption capacity of Fe(II) dissolved in water by using a mineral rich in Manganese Dioxide (MnO2) from Colombia

DYNA ◽

10.15446/dyna.v83n196.53566 ◽

2016 ◽

Vol 83 (196) ◽

pp. 223-228 ◽

Cited By ~ 1

Author(s):

Jhonnathan Machado-Infante ◽

Gustavo Ramírez-Caballero ◽

Martha Juliana Barajas Meneses

Keyword(s):

Aqueous Solution ◽

Raman Spectroscopy ◽

Water Treatment ◽

Adsorption Capacity ◽

Open Systems ◽

Kinetics Of Adsorption ◽

Equilibrium And Kinetics ◽

Pseudo Second Order ◽

Potential Alternative ◽

Kinetics Of

In Colombia, a mineral rich in MnO2 is extracted from the mines of Mallama, Nariño. In this work we studied the adsorption capacity of this mineral for Fe(II) dissolved in aqueous solution of open systems. The characterization was done through ICP-AES, XRF and Raman spectroscopy. The effect of different pretreatments on the mineral with oxidizing agents such as KMnO4 and NaClO was evaluated. Studies of equilibrium and kinetics of adsorption showed that the mechanism fits well to the Langmuir isotherm and its kinetics to a model of pseudo-second order. At the conditions studied was found that the adsorption capacity for the mineral modified with KMnO4 and NaOCl were 59.209 and 51.279 mg/g respectively. It is concluded that the mineral is a potential alternative in water treatment.

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Modified/Unmodified Nanoparticle Adsorbents of Cellulose Origin With High Adsorptive Potential for Removal of Pb(II) From Aqueous Solution

European Scientific Journal ESJ ◽

10.19044/esj.2017.v13n27p425 ◽

2017 ◽

Vol 13 (27) ◽

pp. 425

Author(s):

Azeh Yakubu ◽

Gabriel Ademola Olatunji ◽

Folahan Amoo Adekola

Keyword(s):

Aqueous Solution ◽

Adsorption Capacity ◽

Contact Time ◽

Adsorption Process ◽

Correlation Coefficients ◽

Solution Temperature ◽

Isotherm Models ◽

Maximum Adsorption Capacity ◽

Kinetics Of Adsorption ◽

Kinetics Of

This investigation was conducted to evaluate the adsorption capacity of nanoparticles of cellulose origin. Nanoparticles were synthesized by acid hydrolysis of microcrystalline cellulose/cellulose acetate using 64% H3PO4 and characterized using FTIR, XRD, TGA-DTGA, BET and SEM analysis. Adsorption kinetics of Pb (II) ions in aqueous solution was investigated and the effect of initial concentration, pH, time, adsorbent dosage and solution temperature. The results showed that adsorption increased with increasing concentration with removal efficiencies of 60% and 92.99% for Azeh2 and Azeh10 respectively for initial lead concentration of 3 mg/g. The effects of contact time showed that adsorption maximum was attained within 24h of contact time. The maximum adsorption capacity and removal efficiency were achieved at pH6. Small dose of adsorbent had better performance. The kinetics of adsorption was best described by the pseudo-second-Order model while the adsorption mechanism was chemisorption and pore diffusion based on intra-particle diffusion model. The isotherm model was Freundlich. Though, all tested isotherm models relatively showed good correlation coefficients ranging from 0.969-1.000. The adsorption process was exothermic for Azeh-TDI, with a negative value of -12.812 X 103 KJ/mol. This indicates that the adsorption process for Pb by Azeh-TDI was spontaneous. Adsorption by Azeh2 was endothermic in nature.

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Study on the Kinetics of Adsorption of Cadmium by Chitosan

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.160-162.1804 ◽

2010 ◽

Vol 160-162 ◽

pp. 1804-1809

Author(s):

Qiang Bi ◽

Juan Qin Xue ◽

Ying Juan Guo ◽

Yu Jie Wang ◽

Yun Feng Xue

Keyword(s):

Kinetic Equations ◽

Adsorption Kinetic ◽

Maximum Adsorption Capacity ◽

Kinetics Of Adsorption ◽

Ph Values ◽

Optimum Ph ◽

Pseudo Second Order ◽

Simulated Wastewater ◽

Isotherm Equations ◽

Kinetics Of

The adsorption of cadmium in simulated wastewater by chitosan was investigated. The influence of temperature, contact time and pH on adsorption efficiency of cadmium was examined. Some related mathematical models were used in the fitting of experimental data. The results showed that at room temperature, the optimum pH of adsorption is between 4 and 7. At lower pH values, a strong competition existed between cadmium ions and protons for sorption sites and the sorption efficiency was decreased. After 60 minutes the adsorption equilibrium can be achieved. Chitosan is very effective at removing cadmium with the maximum adsorption capacity is 112.05mg•g-1. The adsorption kinetic curves agree with the pseudo-second-order adsorption kinetic equations and the adsorption isotherms could be well described by Langmuir isotherm equations.

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Kinetics of adsorption of di-n-butyl phthalate (DBP) by four different granule-activated carbons

Frontiers of Chemistry in China ◽

10.1007/s11458-008-0064-6 ◽

2008 ◽

Vol 3 (3) ◽

pp. 288-293 ◽

Cited By ~ 6

Author(s):

Po keung Tsang ◽

Zhanqiang Fang ◽

Hui Liu ◽

Xiaolei Chen

Keyword(s):

Activated Carbons ◽

Kinetics Of Adsorption ◽

Butyl Phthalate ◽

Kinetics Of

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Removal Effect of Atrazine in Co-Solution with Bisphenol A or Humic Acid by Different Activated Carbons

Materials ◽

10.3390/ma11122558 ◽

2018 ◽

Vol 11 (12) ◽

pp. 2558 ◽

Cited By ~ 5

Author(s):

Zhansheng Wu ◽

Xinhui Wei ◽

Yongtao Xue ◽

Xiufang He ◽

Xia Yang

Keyword(s):

Humic Acid ◽

Bisphenol A ◽

Adsorption Kinetics ◽

Competitive Adsorption ◽

Activated Carbons ◽

Second Order ◽

Adsorption Behavior ◽

Single Solution ◽

Pseudo Second Order ◽

Kinetics Of

Activated carbons (ACs) based on apricot shells (AS), wood (W), and walnut shells (WS) were applied to adsorb atrazine in co-solutions. To study the effect of Bisphenol A (BPA) on the adsorption behavior of atrazine, the adsorption performance of ACs for BPA in single solution was studied. The results demonstrated that the adsorption kinetics of BPA fitted the pseudo-second-order model, the adsorption isotherms of BPA followed the Langmuir model. Meanwhile, the adsorption kinetics of atrazine fitted the pseudo-second-order kinetics model and the isotherm was consistent with the Freundlich model both in single solution and co-solution. In addition, competitive adsorption was observed when atrazine coexisted with BPA or humic acid. For the adsorption capacity, the adsorption amount of ASAC, WAC, and WSAC for atrazine obviously decreased by 18.0%, 30.0%, and 30.3% in the presence of BPA, respectively, which was due to the π−π interactions, hydrophobic interactions, and H-bonds, resulting in the competitive adsorption between atrazine and BPA. This study contributes to the further understanding of the adsorption behavior for atrazine in co-solution.

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