Wheat Straw-Derived Activated Carbon for Efficient Removal of Methylene blue: Kinetics, Thermodynamics, and Adsorption Mechanism

Abstract:

Methylene blue, a synthetic organic dye commonly used in industries, poses health and environmental concerns. In the current study, activated carbon derived from wheat straw was used as an adsorbent for removing methylene blue dye from water. The effects of various operating parameters, such as pH, contact time, temperature, mass of adsorbent, and initial concentration of the pollutant, were investigated to understand the adsorption mechanism. The results showed that the activated carbon prepared from wheat straw through a chemical activation with H₃PO₄ was highly effective in adsorbing methylene blue. The Langmuir isotherm provided the best fit to the experimental data, indicating favorable adsorption with a maximum adsorption capacity of 5.2548 mg/g. The kinetic study revealed that the adsorption process followed a pseudo second-order model with significant intraparticle diffusion. The process was found to be spontaneous and endothermic. The activated carbon derived from wheat straw exhibited comparable or even greater adsorption capacity compared to other agricultural by-products and commercial activated carbons. Overall, these findings suggest that wheat straw-derived activated carbon has promising potential as a low-cost adsorbent for removing methylene blue and other organic pollutants from water

• Periodical: Key Engineering Materials (Volume 954)
• Pages: 73-93
• DOI: https://doi.org/10.4028/p-6CKBMf
• Online since: August 2023
• Authors: Mouhssine Benhadj*, Imad Alouiz, Mohamed Yassine Amarouch, Mohamed Sennoune, Driss Mazouzi
• Keywords: Activated Carbon, Adsorption, Kinetic Models, Methylene Blue, Thermodynamic Parameters

References

[1] A. S. Tewfik, M. A. Elsharif, S. Asiri, A. R. I. Mohammed, H. Dafalla, Synthesis of carbon nanotubes grafted with copolymer of acrylic acid and acrylamide for phenol removal, Environ. Nano. Moni. Man. 14 (2020) 100302.

DOI: 10.1016/j.enmm.2020.100302

[2] H. Tahir, M. Sultan, N. Akhtar, U. Hameed, T. Abid, Application of natural and modified sugar cane bagasse for the removal of dye from aqueous solution, J. Saudi. Chem. Soc. 20 (2012) 115-121.

DOI: 10.1016/j.jscs.2012.09.007

[3] A.E. Amri, J. Bensalah, A. Idrissi, K. Lamya, A. Ouass, S. Bouzakraoui, A. Zarrouk, E.H. Rifi, A. Lebkiri, Adsorption of a cationic dye (Methylene bleu) by Typha Latifolia: Equilibrium, kinetic, thermodynamic and DFT calculations, Chemi. Dat. Collec. 38 (2022) 100834.

DOI: 10.1016/j.cdc.2022.100834

[4] O.A.B. Dahman, A. S. Tawfik, Synthesis of carbon nanotubes grafted with PEG and its efficiency for the removal of phenol from industrial wastewater, Envi. Nano. Monit. Manag. 13 (2020) 100286.

DOI: 10.1016/j.enmm.2020.100286

[5] L. Fu1, G. Zhang, S. Wang, L. Zhang, J. Peng, Modification of activated carbon via grafting polyethyleneimine to remove amaranth from water, Appl. Water. Sci. 7 (2017) 4247-4254.

DOI: 10.1007/s13201-017-0557-x

[6] D. Egirani, M.T. Latif, N. Wessey, N.R. Poyi, N. Shehata, Preparation and characterization of powdered and granular activated carbon from Palmae biomass for mercury removal, Appl. Water. Sci. (2021) 11-10.

DOI: 10.1007/s13201-020-01343-8

[7] M. Nurnabi, S. Bhowmik, M. S. Rahman, T. R. Choudhury, A. J. Parsons, S. D. Young, Modification and application of Albizia lebbeck sawdust for the sorption of lead(II) and copper(II) from aqueous solutions, Orien. J. Chem. 36 (2020) 591-600.

DOI: 10.13005/ojc/360401

[8] C. Liu, P. Luan, Q. Li, Z. Cheng, P. Xiang, D. Liu, Y. Hou, Y. Yang, H. Zhu, Biopolymers derived from trees as sustainable multifunctional materials: a review, Adv. Mater. (2020) 1-27.

DOI: 10.1002/adma.202001654

[9] Information on https://www.agrimaroc.net/2021/05/02/la-production-cerealiere-marocaine-en-2020-2021-98-millions-de-quintaux/

[10] H. Mao, D. Zhou, Z. Hashisho, S. Wang, H. Chen, H. Wang, 2014. Preparation of pinewood and wheat straw-based activated carbon via a microwave-assisted potassium hydroxide treatment and an analysis of the effects of the microwave activation conditions, Bioresources. 10 (2014) 809-821.

DOI: 10.15376/biores.10.1.809-821

[11] S. Fournel, Combustion à la ferme de cultures énergétiques : influence de leurs propriétés physico-chimiques sur les émissions atmosphériques, prédiction de la composition des gaz et cadre de qualité de la biomasse agricole, Canada, 2015.

DOI: 10.3917/es.024.0079

[12] M.J. Ahmed, S.K. Theydan, Microporous activated carbon from Siris seed pods by microwave-induced KOH activation for metronidazole adsorption, J. Ana. Appl. Pyrol. 99 (2013) 101-109.

DOI: 10.1016/j.jaap.2012.10.019

[13] W. Jiang, X. Xing, X. Zhang, M. Mi, Prediction of combustion activation energy of NaOH/KOH catalyzed straw pyrolytic carbon based on machine learning, Ren. Energ. 130 (2019) 1216-1225.

DOI: 10.1016/j.renene.2018.08.089

[14] S. Singh, A. Tagade, A. Verma, A. Sharma, S.P. Tekade , A.N. Sawarkar, Insights into kinetic and thermodynamic analyses of co-pyrolysis of wheat straw and plastic waste via thermogravimetric analysis, Biores. Techno. 356 (2022) 127332.

DOI: 10.1016/j.biortech.2022.127332

[15] A. Elmouwahidi, E.B. García, A.F.P. Cadenas, F.J.M. Hódar, F.C. Marín, Activated carbons from KOH and H3PO4-activation of olive residues and its application as supercapacitor electrodes, Electroc. Acta. 229 (2017) 219-228.

DOI: 10.1016/j.electacta.2017.01.152

[16] G.F. Oliveiraa, R.C. Andradeb, M.A.G. Trindadea, H.M.C. Andradeb, C.T. Carvalhoa, Thermogravimetric and spectroscopic study (TG–DTA/FT–IR) of activated carbon from the renewable biomass source babassu, Quim. Nova.40 (2017) 284-292.

DOI: 10.21577/0100-4042.20160191

[17] A. Yaqub, S. Misbah Syed, H. Ajab, M.Z.U. Haq, Activated carbon derived from dodonaea viscosa into beads of calcium-alginate for the sorption of methylene blue (mb): kinetics, equilibrium and thermodynamics, J. Enviro. Manag. 327 (2023) 116925.

DOI: 10.1016/j.jenvman.2022.116925

[18] Q. Lin, K. Wang, M. Gao, Y. Bai, L.Chen, H. Ma, Effectively removal of cationic and anionic dyes by pH-sensitive amphoteric adsorbent derived from agricultural waste-wheat straw, J. Taiwa. Instit. Chemic. Engi. 76 (2017) 65-72.

DOI: 10.1016/j.jtice.2017.04.010

[19] M.H. Nabih, M. Hajam, H. Boulika, Z. Chiki, S.B. Tahar, N.I. Kandri, A. Zerouale, Preparation and characterization of activated carbons from cardoon ''cynara cardunculus" waste: application to the adsorption of synthetic organic dyes, Mater. Tod. Proceed. 72 (2023) 3369-3379.

DOI: 10.1016/j.matpr.2022.07.414

[20] K.K. Beltrame, A.L. Cazetta, P.S.C. De Souza, L. Spessato, T.L. Silva, V.C. Almeida, Adsorption of caffeine on mesoporous activated carbon fibers prepared from pineapple plant leaves, Eco. Enviro. Safe. 147 (2018) 64-71.

DOI: 10.1016/j.ecoenv.2017.08.034

[21] F. Benamraoui, Elimination des colorants cationiques par des charbons actifs synthétisés à partir des résidus de l'agriculture, Setif, Algeria, 2014.

[22] S. Farooq, A.H. Al Maani, Z. Naureen, J. Hussain, A. Siddiqa, A. Al Harrasi, Synthesis and characterization of copper oxide-loaded activated carbon nanocomposite: adsorption of methylene blue, kinetic, isotherm, and thermodynamic study, J. Wat. Proc. Engin. 47 (2022) 102692.

DOI: 10.1016/j.jwpe.2022.102692

[23] T. Wan, R. Huang, Q. Zhao, L. Xiong, L. Qin, X. Tan, G. Cai, Synthesis of wheat straw composite superabsorbent, J. Appl. Polym. Sci. 130 (2013) 3404-3410.

DOI: 10.1002/app.39573

[24] Y. Huang, E. Ma, G. Zhao, Thermal and structure analysis on reaction mechanisms during the preparation of activated carbon fibers by KOH activation from liquefied wood-based fibers, Ind. Cro. and Produ. 69 (2015) 447-455.

DOI: 10.1016/j.indcrop.2015.03.002

[25] K.Kirtania, J. Tanner, K.B. Kabir, S. Rajendran, S. Bhattacharya, in situ synchrotron ir study relating temperature and heating rate to surface functional group changes in biomass, Bioresour. Technol. 151 (2014) 36-42.

DOI: 10.1016/j.biortech.2013.10.034

[26] B. Lei, B. Liu, H. Zhang, L. Yan, H. Xie, G. Zhou, CuO-modified activated carbon for the improvement of toluene removal in air, J. Environ. Sci. 88 (2020) 122-132.

DOI: 10.1016/j.jes.2019.07.001

[27] J.C. Domínguez, M. Oliet, M.V. Alonso, E. Rojo, F. Rodríguez, Structural, thermal and rheological behavior of a bio-based phenolic resin in relation to a commercial resol resin, Ind. Crops. Prod. 42 (2013) 308-314.

DOI: 10.1016/j.indcrop.2012.06.004

[28] M. Teferaa, M. Tulu, Preparation and characterization of activated carbon from wheat straw to remove2, 4-dichlorophenoxy acetic acid from aqueous solutions, Cur. Chem. Lette. 10 (2021) 175-186

DOI: 10.5267/j.ccl.2021.1.002

[29] D. Ingrachen-Brahmi, H. Belkacemi, L.A. Brahem-Mahtout, Adsorption of methylene blue on silica gel derived from algerian siliceous by product of kaolin, J. Mater. Environ. Sci. 11 (2020) 1044-1057.

[30] W. Zhang, H. Yan, H. Li, Z. Jiang, L. Dong, X. Kan, H. Yang , A. Li, R. Cheng, Removal of dyes from aqueous solutions by straw based adsorbents: batch and column studies, Chem. Eng. J. 168 (2011) 1120-1127.

DOI: 10.1016/j.cej.2011.01.094

[31] F.A. Pavan, A.C. Mazzocato, Y. Gushikem, Removal of Methylene blue dye from aqueous solutions by adsorption using yellow passion fruit peel as adsorbent, Bioresour. Technol. 99 (2008) 3162-3165.

DOI: 10.1016/j.biortech.2007.05.067

[32] A. El Amria, J. Bensalah, A. Idrissi, K. Lamya, A. Ouass, S. Bouzakraoui, A. Zarrouk, H. Rifi, A. Lebkiri, Adsorption of a cationic dye (methylene blue) by typha latifolia: equilibrium, kinetic, thermodynamic and dft calculations, Coll. Don. Chim. 38 (2022).

DOI: 10.1016/j.cdc.2022.100834

[33] G. Derouich, S.A. Younssi, J. Bennazha, B. Achiou, M. Ouammou, I.E.E. El-Hassani, A. Albizane, Adsorption study of cationic and anionic dyes onto moroccan natural pozzolan. application for removal of textile dyes from aqueous solutions, Des. wate. Treat. 145 (2019) 348-360.

DOI: 10.5004/dwt.2019.23526

[34] J. Kurek, Alkaloid from Colchicum species in complexes with lithium, sodium, potassium and magnesium cations– spectroscopic characterization, semiempirical and theoretical calculation, fungicidal and cytotoxic activity, J. Mol. Struct. 1204 (2020) 127520.

DOI: 10.1016/j.molstruc.2019.127520

[35] C. Dong, F. Zhang, Z. Pang, G. Yang, Efficient and selective adsorption of multi-metal ions using sulfonated cellulose as adsorbent, Carbohydr. Polym. 151 (2016) 230-236.

DOI: 10.1016/j.carbpol.2016.05.066

[36] J. Kurek, Alkaloid from Colchicum species in complexes with lithium, sodium, potassium and magnesium cations– spectroscopic characterization, semiempirical and theoretical calculation, fungicidal and cytotoxic activity, J. Mol. Struct. 1204 (2020).

DOI: 10.1016/j.molstruc.2019.127520

[37] V.K. Gupta, A. Mittal, V. Gajbe, Adsorption and desorption studies of a water soluble dye, quinoline yellow, using waste materials, J. Colloid. Interf. Sci. 284 (2005) 89-98.

DOI: 10.1016/j.jcis.2004.09.055

[38] W.T. Tsai, H.C. Hsu, T.Y. Su, K.Y. Lin, C.M. Lin, T.H. Dai, The adsorption of cationic dye from aqueous solution onto acid-activated andesite, J. Hazard. Mater. 147 (2007) 1056-1062.

DOI: 10.1016/j.jhazmat.2007.01.141

[39] F. Sakr, A. Sennaoui, M. Elouardi, M. Tamimi, A. Assabbane. Étude de l'adsorption du Bleu de Méthylène sur un biomatériau à base de Cactus (Adsorption study of methylene blue on biomaterial using cactus, J. Mater. Environ. Sci. 6 (2015) 397-406

[40] A.B. Karim, B. Mounir, M. Hachkar, M. Bakasse, A. Yaacoubi, Élimination du colorant basique « bleu de méthylène » en solution aqueuse par l'argile de Safi, R. Sci. Eau. 23 (2010) 375-388.

DOI: 10.7202/045099ar

[41] S. Hong, C. Wen, J. He, F. Gan, Y.S .Ho. Adsorption thermodynamics of methylene blue onto bentonite, J. Hazar. Mater. 167 (2009) 630-633.

DOI: 10.1016/j.jhazmat.2009.01.014

[42] B.H. Hameed, A.L. Ahmad, K.N.A. Latiff. Adsorption of basic dye (methylene blue) onto activated carbon prepared from rattan sawdust. Dye. Pigm. 75 (2007) 143-149.

DOI: 10.1016/j.dyepig.2006.05.039

[43] E.N.E. Qada, S.J. Allen, G.M. Walker, Adsorption of basic dyes from aqueous solution onto activated carbons, Chem. Eng. J. 135 (2008) 174-184.

DOI: 10.1016/j.cej.2007.02.023

[44] T. Mahmood, M. Aslam, A. Naeem, R. Ali, T. Saddiaque, Equilibrium, kinetics, mechanism and thermodynamics studies of As (III) adsorption from aqueous solution using iron impregnated used tea, Desalin. Water Treat. 104 (2018) 135-148.

DOI: 10.5004/dwt.2018.21855

[45] H. Ucun, Y.K. Bayhan, Y. Kaya, A. Cakici, O.F. Algur, Biosorption of chromium(VI) from aqueous solution by cone biomass of Pinus sylvestris, Bioresour. Technol. 85 (2002) 155-158.

DOI: 10.1016/s0960-8524(02)00086-x

[46] D. Park, Y.S. Yun, J.M. Park, Use of dead fungal biomass for the detoxification of hexavalent chromium: screening and kinetics, Process Biochem. 40 (2005) 2559-2565.

DOI: 10.1016/j.procbio.2004.12.002

[47] L. Herrag, Adsorption properties and inhibition of mild steel corrosion in hydrochloric solution by some newly synthesized diamine derivatives: Experimental and theoretical investigations, Corros. Sci. 52 (2010) 3042-3051.

DOI: 10.1016/j.corsci.2010.05.024

[48] S. Sahu, S. Pahi, S. Tripathy, S.K. Singh, A. Behera, U.K. Sahu, R.K. Patel, Adsorption of methylene nlue on chemically modified lychee seed biochar: Dynamic, equilibrium and thermodynamic study, J. Mol. Liqui. 315 (2020).

DOI: 10.1016/j.molliq.2020.113743

[49] S. Lagergren, B.K. Svenska, About the theory of so-called adsorption of soluble substances. Kung. Sven. Veten. Hand. 24 (1898) 1-39.

[50] Y.S. Ho, G. Mckay, Pseudo second order model for sorption process, Process Biochem. 34 (1999) 451-465.

DOI: 10.1016/s0032-9592(98)00112-5

[51] X. Rong, F. Qiu, J. Qin, H. Zhao, J. Yan, D. Yang, A facile hydrothermal synthesis, adsorption kinetics and isotherms to Congo Red azo-dye from aqueous solution of nio/grapheme nanosheets adsorbent, J. Ind. Eng. Chem. 26 (2015) 354-363.

DOI: 10.1016/j.jiec.2014.12.009

[52] H. Sayğili, F. Güzel, Performance of new mesoporous carbon sorbent prepared from grape industrial processing wastes for malachite green and congo red removal. Chem. Eng. Res. Des. 100 (2015) 27-38.

DOI: 10.1016/j.cherd.2015.05.014

[53] H. Ma, Comparison of Activated Carbons Prepared from Wheat Straw via ZnCl2 and KOH Activation, Was. Bio. Valo. 8 (2017) 549-559.

DOI: 10.1007/s12649-016-9640-z

[54] O. Pezoti Jr, A.L. Cazetta, I.P.A.F. Souza, K.C. Bedin, A.C. Martins, T.L. Silva, V.C. Almeida, Adsorption studies of methylene blue onto ZnCl2-activated carbon produced from buriti shells (mauritia flexuosa L.), J. Ind. Eng. Chem. 20 (2014) 4401-4407.

DOI: 10.1016/j.jiec.2014.02.007

[55] S.S. Gupta, K.G. Bhattacharyya, Kinetics of adsorption of metal ions on inorganic materials: A review, Adv. Coll. Inter. Scien.162 (2011) 39-58.

[56] O. Hamdaoui, Batch study of liquid-phase adsorption of methylene blue using cedar sawdust and crushed brick, J. Hazar. Mater. 135 (2006) 264-273.

DOI: 10.1016/j.jhazmat.2005.11.062

[57] M.F.F. Sze,G. McKay, An adsorption diffusion model for removal of para-chlorophenol by activated carbon derived from bituminous coal, Environ. Pollut. 158 (2010) 1669-1674.

DOI: 10.1016/j.envpol.2009.12.003

[58] I. Langmuir, The adsorption of gases on plane surfaces of glass, mica and platinum, J. Am. Chem. Soc. 40 (1918) 1361-1403.

DOI: 10.1021/ja02242a004

[59] H.M.F. Frenudlich, Über die Adsorption in Lösungen. Zeitschrift für Physikalische Chemie. (1906).

[60] M.K. Amosa, M.S. Jami, M.A.F.R. Alkhatib, Electrostatic biosorption of cod, Mn and H2S on efb-based activated carbon produced through steam pyrolysis: an analysis based on surface chemistry, equilibria and kinetics, Was. Biom. Valor. 7 (2016) 109-124.

DOI: 10.1007/s12649-015-9435-7

[61] A.M.M Vargas, A.L. Cazetta, M.H. Kunita, T.L. Silva, V.C. Almeida, Adsorption of Methylene blue on activated carbon produced from flamboyant pods (delonix regia): Study of adsorption isotherms and kinetic models, Che. Eng. Jour. 168 (2011) 722-730.

DOI: 10.1016/j.cej.2011.01.067

[62] K. Mahapatra, D.S. Ramteke, L.J. Paliwal, Production of activated carbon from sludge of food processing industry under controlled pyrolysis and its application for methylene blue removal, J. Ana. Appli. Pyrol. 95 (2012) 79-86.

DOI: 10.1016/j.jaap.2012.01.009

[63] K. Fu, Q. Yue, B. Gao, Y. Sun, L. Zhu, Preparation, characterization and application of lignin-based activated carbon from black liquor lignin by steam activation, Che. Eng. Jour. 228 (2013) 1074-1082.

DOI: 10.1016/j.cej.2013.05.028

[64] A.M.M. Vargas, A.L. Cazetta, A.C. Martins, J.C.G. Moraes, E.E. Garcia, G.F. Gauze, W.F. Costa, V.C. Almeida. Kinetic and equilibrium studies: Adsorption of food dyes acid yellow 6, acid yellow 23, and acid red 18 on activated carbon from flamboyant pods, Che. Eng. Jour. 181–182 (2012) 243-250.

DOI: 10.1016/j.cej.2011.11.073

[65] M. Auta, B.H. Hameed, Optimized waste tea activated carbon for adsorption of Methylene blue and Acid Blue 29 dyes using response surface methodology, Che. Eng. Jour. 175 (2011) 233-243.

DOI: 10.1016/j.cej.2011.09.100

[66] Y. Wu, L. Zhang, C. Gao, J. Ma, X. Ma, R. Han, Adsorption of copper ions and methylene blue in a Single and Binary System on Wheat Straw, J. Chem. Eng. Data. 54 (2009) 3229-3234.

DOI: 10.1021/je900220q

[67] N. Fayoud, S. Alami Younssi , S. Tahiri, A. Albizane.,Kinetic and thermodynamic study of the adsorption of methylene blue on wood ashes, J. Mater. Environ. Sci. 11 (2015) 3295-3306.

DOI: 10.1080/19443994.2015.1079249

[68] M. J. Iqbal, M.N. Ashiq, Adsorption of dyes from aqueous solutions on activated charcoal, J. Haza. Mater. (2007) 57-66.

DOI: 10.1016/j.jhazmat.2006.06.007

[69] M. Trachi, N. Bourfis, S. Benamara, H. Gougam, Préparation et caractérisation d'un charbon actif à partir de la coquille d'amande (Prunus amygdalus) amère, Bio. Agron. Soc. Environ. 18 (2014) 492-502.

[70] A. Aarfane, A. Salhi, M. El Krati, S. Tahiri, M. Monkade, E.K. Lhadi, M. Bensitel, Kinetic and thermodynamic study of the adsorption of red 195 and methylene blue dyes on fly ash and bottom ash in aqueous medium, J. Mater. Environ. Sci. 6 (2014) 1927-1939.

DOI: 10.5004/dwt.2019.24168

[71] A. Aygun, S. Yenisoy-Karaka, I. Duman, Production of granular activated carbon from fruit stones and nutshells and evaluation of their physical, chemical and adsorption properties, Micr. Meso. Mater. 66 (2003) 189-195.

DOI: 10.1016/j.micromeso.2003.08.028

[72] M. Rafatullah, O. Sulaiman, R. Hashim, A. Ahmad, Adsorption of methylene blue on low-cost adsorbents, J. Hazar. Mater. 177 (2010) 70-80.

DOI: 10.1016/j.jhazmat.2009.12.047

[73] R. L. Tseng, S.K. Tseng, F.C. Wu, Preparation of high surface area carbons from corncob with KOH etching plus CO2 gasification for the adsorption of dyes and phenols from water, Coll. Surf. Physi. Eng. Aspe. 279 (2006) 69-78.

DOI: 10.1016/j.colsurfa.2005.12.042

[74] P.S. Kumar, R.V. Abhinaya, K.G. Lashmi, V. Arthi, R. Pavithra, V. Sathyaselvabala, Adsorption of Methylene blue dye from aqueous solution by agricultural waste: Equilibrium, thermodynamics, kinetics, mechanism and process design, Coll. Journ. 73 (2011) 651-661.

DOI: 10.1134/s1061933x11050061

[75] A.O.B. Dahman, T.A. Saleh, Synthesis of carbon nanotubes grafted with peg and its efficiency for the removal of phenol from industrial wastewater, Envir. Nano. Moni. Manag. 13 (2020) 100286.

DOI: 10.1016/j.enmm.2020.100286

[76] P.Wang, M.Cao, C.Wang, Y. Ao, J. Hou, J. Qian, Kintics and thermodynamics of adsorption of methylene blue by a magnetic graphen-carbon nanotube composite, App. Surf. Sci. 290 (2014) 116-124.

DOI: 10.1016/j.apsusc.2013.11.010

[77] E. Vunain, T. Biswick, Adsorptive removal of methylene blue from aqueous solution on activated carbon prepared from malawian baobab fruit shell wastes: equilibrium, kinetics and thermodynamic studies, Sep. Sci. Techn. (2018) 27-41.

DOI: 10.1080/01496395.2018.1504794

[78] U.A. Isah, G. Abdulraheem, S. Bala, S. Muhammad, M. Abdullahi, Kinetics, equilibrium and thermodynamics studies of c.i. reactive blue 19 dye adsorption on coconut shell based activated carbon. Int. Bio. Biode. (2015) 1-9.

DOI: 10.1016/j.ibiod.2015.04.006