[1]A.A. Adepoju-Bello and O.M. Alabi, Heavy metals: A review, Nig. J. Pharm. 37 (2005) 41-45.
[2]T.A. Kurniawan, G.Y. Chan, W.H. Lo and S. Babel, Physicochemical treatment techniques for wastewater laden with heavy metals, Chem. Eng.118 (2006) 83-98.
[3]D.W. O’Connell, C. Birkinshaw and T.F. O’Dwyer, Heavy metal adsorbents prepared from the modification of cellulose: A review, Bioresource Technol. 99 (2008) 6709-6724.
[4]F. Fu and Q. Wang, Removal of heavy metal ions from wastewaters: a review. J. Env. Mgt. 92 (2011) 407-418.
[5]G. Tchobanoglous, F.L. Burton and H.D. Stensel, Wastewater engineering, treatment and reuse. 4th Ed. Metcalf and Teddy, McGraw Hill: (2003)1819-1822.
[6]A. Bhatnagar, M. Sillanpaa and A. Witek-Krowiat, Agricultural waste peels as versatile biomass for water purification- a review, Chem. Eng. J. 270 (2015) 244-271.
[7]I. Ali, M. Asim and T.A. Khan, Low cost adsorbent for removal of organic pollutants from wastewater, J. Env. Mgt.113 (2012) 170-183.
[8]G. Zhao, X. Wu, X. Tan and X. Wang, Sorption of heavy metal ions from solutions: A review, Col. Sci. J. 4 (2011) 19-31.
[9]M.A. Barakat, New trends in removing heavy metals from industrial wastewater. Arab. J. Chem. 4 (2011) 361-377.
[10]S.S. Gupta and K.G. Bhattacharyya, Kinetics of adsorption of metal ions on inorganic materials: a review, Adv. Col. Int. Sci, 162 (2011) 39-58.
[11]G. Limousin, J.P. Gaudet, L. Charlet, S. Szenknect, V. Barthes and M. Krimissa, Sorption isotherms: a review on physical bases, modeling and measurement. Appl. Geochem. 22 (2007) 249-275.
[12]H. Qiu, L. Lv, B.C. Pan, Q.J. Zhang, W.M. Zhang and Q.X. Zhang, Critical review in adsorption kinetic models, J. Zhe. Univ. Sci. A, 10 (2009) 716-724.
[13]Y.S. Ho and G. McKay, Pseudo-Second Order Model for Sorption Processes, Pro. Biochem. (1999) 735-742.
[14]J. Zhang and R. Stanforth, Slow Adsorption Reaction between Arsenic Species and Geothite, Diffusion or Heterogeneous Surface Reaction Control, Lang. 21 (2005) 2895-2901.
[15]F. Wu and R. Tseng, Juang Initial behaviour of Intraparticle Diffusion Model used in the Description of Adsorption Kinetics. Chem. Eng. J. 153 (2009) 1-8.
[16]A.A. Khan and R.P. Singh, Adsorption Thermodynamics of Carbofuran on Sn (IV) Arseno silicate in H+, Na+ and Ca+2 forms, Col. Surf. 24 (1987) 33-42.
[17]V.C. Srivastava, M.M. Swamy, I.D. Mall, B. Prasad and I.M. Mishra, Adsorptive Removal of Phenol by Bagasse fly ash and Activated Carbon: Equilibrium, Kinetics and Thermodynamics, Col. Surf. 272 (2006) 89-104.
[18]K. Foo and B.H. Hameed, Insights into the modeling of adsorption isotherm systems, Chem. Eng. 156 (2010) 2-10.
[19]H. Aydin, Y. Bulut and C. Yerlikaya, Removal of copper (II) from aqueous solution by adsorption onto low cost adsorbents, Env. Mgt. 87 (2008) 37-45.
[20]A.M. Aljeboree, A.N. Alshirifi and A,F Alkaim, Kinetics and equilibrium study for the adsorption of textile dyes on coconut shell activated carbon. Arab. J. Chem. 10 (2014) 29-31.
[21]V. Heuze, D. Sauvant, G.Tran, F. Lebas and M. Lessire, Carob (Ceratonia siliqua) Feedipedia.org. A programme by INRA, CIRAD, AFZ and FAO. (2013) 23-31
[22]APHA-American Public Health Association, Standard method for the examination of water and wastewater, 19th Edn. Washington DC. (1995) 22-31.
[23]AWWA-American Water Works Association, Standard method for the examination of water and wastewater, 19th Edn. Washington DC. (1995) 211-215.
[24]O.S. Amuda, A.A. Giwa and I.A. Bello, Removal of heavy metal from industrial wastewater using modified activated coconut shell carbon, Biochem. Eng. 36 (2007) 174-181.
[25]M.S. Sreekala, M.G. Kumaran and S.Thomas, Oil palm fibers: Morphology, chemical composition, surface modification, and mechanical properties, Appl. Pol. Sci. 66 (1997) 821–835.
[26]A.U. Itodo, F.A. Atiku, R.A. Kolo and A.A. Kwaido, Dyes Uptake onto Processed Raw Mango Seed back, .Asi. J. Pl. Sci.Res. 1 (2011) 57-66.
[27]E.S.M. El-Dars, M.H. Ibrahim, B.A.H. Farag, Z.M. Abdelwahhab and H.E. Shalabi, Preparation, Characterization of Bentonite Carbon Composite and Design Application In Adsorption of Bromothymol Blue Dye, Eng. Sci. Tech. 3 (2016) 3758-3765.
[28]M. Niswir, S. Arita and S. Marsi, Characterization of Bentonite by XRD and SEM-EDS and Use to Increase PH and Color Removal, Fe and Organic Substances in Peat. Wat. (2013) 313-317.
[29]M. Bosnic, J. Buljan and R.P. Daniels, Pollutants In Tannery Effluents; United Nations Industrial Development Organization(UNIDO), US/RAS/92/120 (2000) 88-91.
[30]V.K. Verma and A.K. Mishra, Kinetic and Isotherm Modeling of Adsorption of Dyes Onto Rice Husk Carbon; Glo.. NEST. 2 (2010) 190-196.
[31]A.S. Peter, I.A. Danie, O.L. George and O.A.A. Ernest, Comparative study of the quality of wastewater from Tema oil refinery (TOR) against EPA standards and its effect on the environment, Civ. Env. Res. 6 (2014) 17.
[32]H.A. Mohammed, A. Hamza, I.K. Adamu, A. Ejila, S.M. Waziri and S.I. Mustapha, BOD5 removal from tannery wastewater over ZnO-ZnFe2O4 composite photocatalyst supported on activated carbon, Chem. Eng.Mat. Sci. 4 (2013) 80-86.
[33]M.E. Khaled, E. Ashraf and H. Ibrahim, Equilibrium and Kinetic Studies of Cu (II) Biosorption Onto Waste Tea and Coffee Powder (WTCP), Iran. J. Anal. Chem. 5 (2018) 31-38
[34]S. Krishanamoorthi, V. Sivakumar, K. Saravanan and P.T.V. Sriram, Treatment and reuse of tannery waste water by embedded system, Mod. Appl. Sci. 3 (2009).
[35]E.L. Hawlay, A.D. Rula C.K. Michael and J.R.G. James, Treatment Technologies for Chromium(VI), CRC Press LLC, L1C08. (2004) 273-276
[36]D.B. Veena, A.A. Jahagirdar and A.M.N. Zulfiqar, Adsorption of Chromium on Activated Carbon Prepared from Coconut Shell, Int. J. Eng. Res. Appl. 2 (2012) 364-370.
[37]H.A. Aziz, M.S. Yusoff, M.N. Adlan, N.H. Adnan and S. Alias, Heavy metals, Waste Mgt. 24 (2008) 353-358.
[38]D. Kibami, C.K.S. Pongener, K.S. Rao and D. Sinha, Preparation and characterization of activated carbon from Fagopyrum esculentum Moench by HNO3 and H3PO4 chemical activation, Der Chem. Sin. 5 (2014) 46-55
[39]A.S. Ahmed, A.M. Tantawy, M.E. Abdallah and I.M. Qassim, Characterization and application of kaolinite clay as solid phase extractor for removal of copper ions from environmental water samples, Int. J. Adv. Res. 3 (2015) 1-21
[40]. M. Makeswari, T. Santhi and M.R. Ezhilarasi, Adsorption of methylene blue dye by citric acid modified leaves of Ricinus communis from aqueous solutions, Chem. Pharm. Res. 8 (2016) 452-462.
[41]M. Suguna, K.N. Siva, S.M. Venkata and A. Krishnaiah, Removal of divalent manganese from aqueous solution using Tamarindusindica Fruit Nut Shell, Chem. Pharm. Res. 2 (2010)7-20.
[42]T. Karichappan, S. Venkatachalam and P.M. Jeganathan, Optimization of electrocoagulation process to treat grey wastewater in batch mode using response surface methodology. Env. Hlt. Sci. Eng. 12 (2014) 29-40.
[43]H. Hiroyuki, N. Hideki and T. Kataoka, Adsorption of BSA on strongly basic chitosan-Equilibra, Biotech. Bioeng. 43 (1994) 1087-1093.
[44]M.E. Taha, H.M. Zeinhom, S.Walied and M.I. Ahmed, Kinetic and Equilibrium Isotherms Studies of Adsorption of Pb (II) from Water onto Natural Adsorbent. JEP. 5 (2014) 1667-1681.
[45]K.K.H.Choy, D.C.K. Ko, C.W. Cheung, J.F. Porter and G. McKay. Film and intraparticle mass transfer during the adsorption of metal ions onto bone char. Col. Interf. Sci. 271 (2004) 284–295.
[46]K. Mohanty, D. Das, M.N. Biswas, Adsorption of phenol from aqueous solutions using activated carbons prepared from Tectona grandis sawdust by ZnCl2 activation, Chem. Eng. 115 (2005) 121-131.