[1] Guidelines for drinking-water quality (2004). Vol. 1. World Health Organization.
[2] Fu, F., Wang, Q. (2011). Removal of heavy metal ions from wastewaters: a review. Journal of environmental management, 92(3), 407-418.
[3] Wu, L., Zhang, X., Chen, L., Zhang, H., Li, C., Lv, Y., Guo, X. (2018). Amphoteric starch derivatives as reusable flocculant for heavy-metal removal. RSC advances, 8(3), 1274-1280.
[4] Carolin, C. F., Kumar, P. S., Saravanan, A., Joshiba, G. J., Naushad, M. (2017). Efficient techniques for the removal of toxic heavy metals from aquatic environment: A review. Journal of environmental chemical engineering, 5(3), 2782-2799.
[5] Ozaki, H., Sharma, K., Saktaywin, W. (2002). Performance of an ultra-low-pressure reverse osmosis membrane (ULPROM) for separating heavy metal: effects of interference parameters. Desalination, 144(1-3), 287-294.
[6] Calvo, B., L. Canoira, F. Morante, J.M. Martínez-Bedia, C. Vinagre, J.-E. García-González, J. Elsen, and R. Alcantara (2009) Continuous elimination of Pb2+, Cu2+, Zn2+, H+ and NH4+ from acidic waters by ionic exchange on natural zeolites. Journal of hazardous materials. 166(2-3), 619-627.
[7] Matlock, M.M., B.S. Howerton, and D.A. Atwood (2002) Chemical precipitation of heavy metals from acid mine drainage. Water research. 36(19), 4757-4764.
[8] Wang, J. and C. Chen (2006) Biosorption of heavy metals by Saccharomyces cerevisiae: a review. Biotechnology advances. 24(5), 427-451.
[9] Ozaki, H., Sharma, K., Saktaywin, W. (2002). Performance of an ultra-low-pressure reverse osmosis membrane (ULPROM) for separating heavy metal: effects of interference parameters. Desalination, 144(1-3), 287-294.
[10] Chang, Y.-C. and D.-H. Chen (2005) Preparation and adsorption properties of monodisperse chitosan-bound Fe3O4 magnetic nanoparticles for removal of Cu (II) ions. Journal of colloid and interface science. 283(2).446-451.
[11] Deze, E.G., S.K. Papageorgiou, E.P. Favvas, and F.K. Katsaros (2012) Porous alginate aerogel beads for effective and rapid heavy metal sorption from aqueous solutions: Effect of porosity in Cu2+ and Cd2+ ion sorption. Chemical engineering journal. 209, 537-546.
[12] Lagoa, R. and J.R. Rodrigues (2009) Kinetic analysis of metal uptake by dry and gel alginate particles. Biochemical engineering journal. 46(3), 320-326.
[13] Das, D., G. Basak, V. Lakshmi, and N. Das (2012) Kinetics and equilibrium studies on removal of zinc (II) by untreated and anionic surfactant treated dead biomass of yeast: Batch and column mode. Biochemical engineering journal. 64, 30-47.
[14] Davis, T., B. Volesky, and R. Vieira (2000) Sargassum seaweed as biosorbent for heavy metals. Water research. 34(17), 4270-4278.
[15] Aguayo-Villarreal, I.A., A. Bonilla-Petriciolet, V. Hernández-Montoya, M.A. Montes-Moránc, and H.E. Reynel-Avila (2011) Batch and column studies of Zn2+ removal from aqueous solution using chicken feathers as sorbents. Chemical engineering journal. 167, 67-76.
[16] Al-Asheh, S., F. Banat, and D. Al-Rousan (2003) Beneficial reuse of chicken feathers in removal of heavy metals from wastewater. Journal of cleaner production. 11, 321-326.
[17] Gao, P., Z. Liu, X. Wu, Z. Cao, Y. Zhuang, W. Sun, G. Xue, and M. Zhou (2014) Biosorption of Chromium (VI) Ions by Deposits Produced from Chicken Feathers after Soluble Keratin Extraction. Clean–soil, air, water. 42(11), 1558-1566.
[18] Wu, N., H. Wei, and L. Zhang (2011) Efficient removal of heavy metal ions with biopolymer template synthesized mesoporous titania beads of hundreds of micrometers size. Environmental science and technology. 46(1), 419-425.
[19] Guo, S., P. Jiao, Z. Dan, N. Duan, G. Chen, and J. Zhang (2017) Preparation of L-arginine modified magnetic adsorbent by one-step method for removal of Zn (Ⅱ) and Cd (Ⅱ) from aqueous solution. Chemical engineering journal. 317, 999-1011.
[20] Zhou, L., Y. Wang, Z. Liu, and Q. Huang (2006) Carboxymethyl chitosan-Fe3O4 nanoparticles: preparation and adsorption behavior toward Zn2+ ions. Acta Physico-Chimica Sinica. 22(11), 1342-1346.
[21] Zhou, Y.-T., H.-L. Nie, C. Branford-White, Z.-Y. He, and L.-M. Zhu (2009) Removal of Cu2+ from aqueous solution by chitosan-coated magnetic nanoparticles modified with α-ketoglutaric acid. Journal of colloid and interface science. 330(1), 29-37.
[22] Ayub, A., Z.A. Raza, M.I. Majeed, M.R. Tariq, and A. Irfan (2020) Development of sustainable magnetic chitosan biosorbent beads for kinetic remediation of arsenic contaminated water. International journal of biological macromolecules. 163, 603-617.
[23] Noor, N.M., R. Othman, N. Mubarak, and E.C. Abdullah (2017) Agricultural biomass-derived magnetic adsorbents: Preparation and application for heavy metals removal. Journal of the Taiwan institute of chemical engineers. 78, 168-177.
[24] Luo, X., J. Zeng, S. Liu, and L. Zhang (2015) An effective and recyclable adsorbent for the removal of heavy metal ions from aqueous system: magnetic chitosan/cellulose microspheres. Bioresource technology. 194, 403-406.
[25] Mousavi, S.Z., M. Manteghian, S.A. Shojaosadati, and H. Pahlavanzadeh (2018) Preparation and characterization of magnetic keratin nanocomposite. Materials Chemistry and Physics. 215, 40-45.
[26] Mousavi, S. Z., Manteghian, M., Shojaosadati, S. A., Pahlavanzadeh, H. (2018). Keratin nanoparticles: synthesis and application for Cu (II) removal. Advances in environmental technology, 4(2), 83-93.
[27] Lagergren, S. (1898) Zur theorie der sogenannten adsorption geloster stoffe. Kungliga svenska vetenskapsakademiens. Handlingar. 24,1-39.
[28] Ho, Y.-S., G. McKay (1999) Pseudo-second order model for sorption processes. Process biochemistry. 34(5), 451-465.
[29] Khosa, M.A., A. Ullah (2014) In-situ modification, regeneration, and application of keratin biopolymer for arsenic removal. Journal of hazardous materials. 248, 360-371.
[31] Langmuir, I. (1916) The constitution and fundamental properties of solids and liquids. Part I. Solids. Journal of the American chemical society. 38(11), 2221-2295.
[32] Freundlich, U. (1906) Die adsorption in lusungen.
[33] Redlich, O., D.L. Peterson (1959) A useful adsorption isotherm. Journal of physical chemistry. 63(6), 1024-1024.
[34] Foo, K.Y. and B.H. Hameed (2010) Insights into the modeling of adsorption isotherm systems. Chemical engineering journal. 156(1), 2-10.
[35] Al-Ghouti, M. A., Da'ana, D. A. (2020). Guidelines for the use and interpretation of adsorption isotherm models: A review. Journal of hazardous materials, 393, 122383.
[36] Sips, R. (1948). On the structure of a catalyst surface. The journal of chemical physics, 16(5), 490-495.
[37] Pan, L., Z. Wang, Q. Yang, and R. Huang (2018) Efficient removal of lead, copper and cadmium ions from water by a porous calcium alginate/graphene oxide composite aerogel. Nanomaterials. 8(11), 957.
[38] Badruddoza, A., A. Tay, P. Tan, K. Hidajat, and M. Uddin (2011) Carboxymethyl-β-cyclodextrin conjugated magnetic nanoparticles as nano-adsorbents for removal of copper ions: synthesis and adsorption studies. Journal of hazardous materials. 185(2-3), 1177-1186.
[39] Latour, R.A. (2015) The Langmuir isotherm: a commonly applied but misleading approach for the analysis of protein adsorption behavior. Journal of biomedical materials research part A. 103(3), 949-958.
[40] Kumar, K.V. and S. Sivanesan (2006) Equilibrium data, isotherm parameters and process design for partial and complete isotherm of methylene blue onto activated carbon. Journal of hazardous materials. 134(1-3), 237-244.
[41] Nethaji, S., A. Sivasamy, and A. Mandal (2013) Adsorption isotherms, kinetics and mechanism for the adsorption of cationic and anionic dyes onto carbonaceous particles prepared from Juglans regia shell biomass. International journal of environmental science and technology. 10(2), 231-242.
[42] Tran, H.N., S.-J. You, A. Hosseini-Bandegharaei, and H.-P. Chao (2017) Mistakes and inconsistencies regarding adsorption of contaminants from aqueous solutions: a critical review. Water research. 120, 88-116.