References

  1. M. Rahman, S. Gul, M. Ajmal, A. Iqbal, A. Achakzai, Removal of cadmium from aqueous solutions using excised leaves of Quetta pine (Pinus halepensis Mill.), Bangladesh J. Bot., 42 (2014) 277–281.
  2. N.V. Perez-Aguilar, E. Muñoz-Sandoval, P.E. Diaz-Flores, J.R. Rangel-Mendez, Adsorption of cadmium and lead onto oxidized nitrogen-doped multiwall carbon nanotubes in aqueous solution: equilibrium and kinetics, J. Nanopart. Res., 12 (2010) 467–480.
  3. M. Mohammadi, A. Ghaemi, M. Torab-Mostaedi, M. Asadollahzadeh, A. Hemmati, Adsorption of cadmium(II) and nickel(II) on dolomite powder, Desal. Wat. Treat., 53 (2013) 149–157.
  4. T. Chen, Z. Zhou, R. Han, R. Meng, H. Wang, W. Lu, Adsorption of cadmium by biochar derived from municipal sewage sludge: impact factors and adsorption mechanism, Chemosphere, 134 (2015) 286–293.
  5. T.A. Saleh, M. Tuzen, A. Sarı, Magnetic activated carbon loaded with tungsten oxide nanoparticles for aluminum removal from waters, J. Environ. Chem. Eng., 5 (2017) 2853–2860.
  6. O.A. Oyetade, A.A. Skelton, V.O. Nyamori, S.B. Jonnalagadda, B.S. Martincigh, Experimental and DFT studies on the selective adsorption of Pb2+ and Zn2+ from aqueous solution by nitrogenfunctionalized multiwalled carbon nanotubes, Sep. Purif. Technol., 188 (2017) 174–187.
  7. K. Kadirvelu, M. Kavipriya, C. Karthika, N. Vennilamani, S. Pattabhi, Mercury(II) adsorption by activated carbon made from sago waste, Carbon, 42 (2004) 745–752.
  8. S. Wu, K. Zhang, X. Wang, Y. Jia, B. Sun, T. Luo, F. Meng, Z. Jin, D. Lin, W. Shen, L. Kong, J. Liu, Enhanced adsorption of cadmium ions by 3D sulfonated reduced graphene oxide, Chem. Eng. J., 262 (2015) 1292–1302.
  9. Y.-H. Li, S. Wang, Z. Luan, J. Ding, C. Xu, D. Wu, Adsorption of cadmium(II) from aqueous solution by surface oxidized carbon nanotubes, Carbon, 41 (2003) 1057–1062.
  10. B.B. Johnson, Effect of pH, temperature, and concentration on the adsorption of cadmium on geothite, Environ. Sci. Technol., 24 (1990) 112–118.
  11. J. Liang, J. Liu, X. Yuan, H. Dong, G. Zeng, H. Wu, H. Wang, J. Liu, S. Hua, S. Zhang, Z. Yu, X. He, Y. He, Facile synthesis of alumina-decorated multi-walled carbon nanotubes for simultaneous adsorption of cadmium ion and trichloroethylene, Chem. Eng. J., 273 (2015) 101–110.
  12. World Health Organization, Guidelines for Drinking-Water Quality, WHO, Geneva, 2008.
  13. World Health Organization, Guidelines for Drinking-Water Quality, WHO, Geneva, 2011.
  14. E. Kopysc, K. Pyrzynska, S. Garbos, E. Bulska, Determination of mercury by cold-vapor atomic absorption spectrometry with preconcentration on a gold-trap, Anal. Sci., 16 (2000) 1309–1312.
  15. P. Hadi, M.H. To, C.W. Hui, C.S. Lin, G. McKay, Aqueous mercury adsorption by activated carbons, Water Res., 73 (2015) 37–55.
  16. D. Mohan, V.K. Gupta, S.K. Srivastava, S. Chander, Kinetics of mercury adsorption from wastewater using activated carbon derived from fertilizer waste, Colloids Surf., A, 177 (2009) 169–181.
  17. N.A. Kabbashi, M. Elwathig, A. AbuSam, I.N. Bt Jamil, Kinetic study on Hg(II) removal by CNT, Prog. Nanotechnol. Nanomater., 4 (2015) 1–6.
  18. Y. Zhang, L. Zhao, R. Guo, N. Song, J. Wang, Y. Cao, W. Orndorff, W.-P. Pan, Mercury adsorption characteristics of HBr-modified fly ash in an entrained-flow reactor, J. Environ. Sci., 33 (2015) 156–162.
  19. Q. Zhou, Y. Duan, C. Zhu, J. Zhang, M. She, H. Wei, Y. Hong, Adsorption equilibrium, kinetics and mechanism studies of mercury on coal-fired fly ash, Korean J. Chem. Eng., 32 (2015) 1405–1413.
  20. The European Parliament and the Council of the European Union, Directive 2011/65/EU of the European Parliament and of the Council of 8 June 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment, Off. J. Eur. Union, 174 (2011) 88–110.
  21. L.Y. Blue, P. Jana, D.A. Atwood, Aqueous mercury precipitation with the synthetic dithiolate, BDTH2, Fuel, 89 (2010) 1326–1330.
  22. N. Ratner, D. Mandler, Electrochemical detection of low concentrations of mercury in water using gold nanoparticles, Anal. Chem., 87 (2015) 5148–5155.
  23. A. Elsherief, Removal of cadmium from simulated wastewaters by electrodeposition on spiral wound steel electrode, Electrochim. Acta, 48 (2003) 2667–2673.
  24. C.S. Slater, A. Ferrari, P. Wisniewski, Removal of cadmium from metal processing wastewaters by reverse osmosis, J. Environ. Sci. Health, Part A, 22 (1987) 707–728.
  25. Y.K. Henneberry, T.E.C. Kraus, J.A. Fleck, D.P. Krabbenhoft, P.M. Bachand, W.R. Horwath, Removal of inorganic mercury and methylmercury from surface waters following coagulation of dissolved organic matter with metal-based salts, Sci. Total Environ., 409 (2011) 631–637.
  26. T.S. Anirudhan, L. Divya, M. Ramachandran, Mercury(II) removal from aqueous solutions and wastewaters using a novel cation exchanger derived from coconut coir pith and its recovery, J. Hazard. Mater., 157 (2008) 620–627.
  27. T.A. Saleh, A. Sarı, M. Tuzen, Effective adsorption of antimony(III) from aqueous solutions by polyamide-graphene composite as a novel adsorbent, Chem. Eng. J., 307 (2017) 230–238.
  28. E. Altıntıg, H. Altundag, M. Tuzen, A. Sarı, Effective removal of methylene blue from aqueous solutions using magnetic loaded activated carbon as novel adsorbent, Chem. Eng. Res. Des., 122 (2017) 151–163.
  29. Z.A. Al Othman, A. Hashem, M.A. Habila, Kinetic, equilibrium and thermodynamic studies of cadmium(II) adsorption by modified agricultural wastes, Molecules, 16 (2011) 10443–10456.
  30. D. Mohan, K.P. Singh, Single- and multi-component adsorption of cadmium and zinc using activated carbon derived from bagasse—an agricultural waste, Water Res., 36 (2002) 2304–2318.
  31. C. Xiong, C. Yao, Study on the adsorption of cadmium(II) from aqueous solution by D152 resin, J. Hazard. Mater., 166 (2009) 815–820.
  32. I.A.A. Hamza, Preparation and Evaluation of a Sugarcane Bagasse Multi-Walled Carbon Nanotube Composite for the Adsorption of Heavy Metals from Aqueous Solutions, PhD Thesis, University of KwaZulu-Natal, Durban, South Africa, 2013.
  33. P.S. Kumar, K. Ramakrishnan, S.D. Kirupha, S. Sivanesan, Thermodynamic and kinetic studies of cadmium adsorption from aqueous solution onto rice husk, Braz. J. Chem. Eng., 27 (2010) 347–355.
  34. M.E.I. Ahmed, Selective adsorption of cadmium species onto organic clay using experimental and geochemical speciation modeling data, Int. J. Eng. Sci. Technol., 8 (2016) 128–131.
  35. O.A. Oyetade, V.O. Nyamori, B.S. Martincigh, S.B. Jonnalagadda, Effectiveness of carbon nanotube-cobalt ferrite nanocomposites for the adsorption of rhodamine B from aqueous solutions, RSC Adv., 5 (2015) 22724–22739.
  36. A. Dourani, M. Hamadanian, M. Haghgoo, Morphology and electrical properties of multi-walled carbon nanotube/carbon aerogel prepared by using polyacrylonitrile as precursor, RSC Adv., 5 (2015) 49944–49952.
  37. Y. Li, J. Niu, Z. Shen, C. Feng, Size effect of single-walled carbon nanotube on adsorption of perfluorooctanesulfonate, Chemosphere, 91 (2013) 784–790.
  38. Y. Zhou, B. Wen, Z. Pei, G. Chen, J. Lv, J. Fang, X. Shan, S. Zhang, Coadsorption of copper and perfluorooctane sulfonate onto multi-walled carbon nanotubes, Chem. Eng. J., 203 (2012) 148–157.
  39. Z. Wang, J. Zhao, L. Song, H. Mashayekhi, B. Chefetz, B. Xing, Adsorption and desorption of phenanthrene on carbon nanotubes in simulated gastrointestinal fluids, Environ. Sci. Technol., 45 (2011) 6018–6024.
  40. J.-L. Gong, B. Wang, G.-M. Zeng, C.-P. Yang, C.-G. Niu, Q.-Y. Niu, W.-J. Zhoua, Y. Liang, Removal of cationic dyes from aqueous solution using magnetic multi-wall carbon nanotube nanocomposite as adsorbent, J. Hazard. Mater., 164 (2009) 1517–1522.
  41. G.-C. Chen, X.-Q. Shan, Y.-S. Wang, B. Wen, Z.-G. Pei, Y.-N. Xie, T. Liu, J.J. Pignatello, Adsorption of 2,4,6-trichlorophenol by multi-walled carbon nanotubes as affected by Cu(II), Water Res., 43 (2009) 2409–2418.
  42. O.A. Oyetade, V.O. Nyamori, B.S. Martincigh, S.B. Jonnalagadda, Nitrogen-functionalised carbon nanotubes as a novel adsorbent for the removal of Cu(II) from aqueous solution, RSC Adv., 6 (2016) 2731–2745.
  43. S. Santangelo, G. Messina, G. Faggio, S.H. Abdul Rahim, C. Milone, Effect of sulphuric-nitric acid mixture composition on surface chemistry and structural evolution of liquid-phase oxidised carbon nanotubes, J. Raman Spectrosc., 43 (2012) 1432–1442.
  44. J. Shen, W. Huang, L. Wu, Y. Hu, M. Ye, Study on aminofunctionalized multiwalled carbon nanotubes, Mater. Sci. Eng., A, 464 (2007) 151–156.
  45. A.I. Vogel, A Textbook of Quantitative Inorganic Analysis Including Elementary Instrumental Analysis, 3rd ed., Longman, London, 1961.
  46. J. Lin, L. Wang, Comparison between linear and non-linear forms of pseudo-first-order and pseudo-second-order adsorption kinetic models for the removal of methylene blue by activated carbon, Front. Environ. Sci. Eng., 3 (2009) 320–324.
  47. Y.S. Ho, Comment on Cadmium removal from aqueous solutions by chitin: kinetic and equilibrium studies, Water Res., 38 (2004) 2962–2964.
  48. Y.-S. Ho, Removal of copper ions from aqueous solution by tree fern, Water Res., 37 (2003) 2323–2330.
  49. Y.S. Ho, G. McKay, Pseudo-second order model for sorption processes, Process Biochem., 34 (1999) 451–465.
  50. S.H. Chien, W.R. Clayton, Application of Elovich equation to the kinetics of phosphate release and sorption in soils, Soil Sci. Soc. Am. J., 44 (1980) 265–268.
  51. E. Demirbas, M. Kobya, E. Senturk, T. Ozkan, Adsorption kinetics for the removal of chromium(VI) from aqueous solutions on the activated carbons prepared from agricultural wastes, Water SA, 30 (2004) 533–539.
  52. I. Langmuir, The adsorption of gases on plane surfaces of glass, mica and platinum, J. Am. Chem. Soc., 40 (1918) 1361–1402.
  53. H. Freundlich, Adsorption in solids, Z. Phys. Chem., 57 (1906) 385–470.
  54. M.I. Temkin, V. Pyzhev, Kinetics of ammonia synthesis on promoted iron catalysts, Acta Phys. Chim., 12 (1940) 327–356.
  55. M.M. Dubinin, L.V. Radushkevich, The equation of the characteristic curve of activated charcoal, Proc. Acad. Sci. USSR, Phys. Chem. Sect., 55 (1947) 327–329.
  56. R. Sips, Combined form of Langmuir and Freundlich equations, J. Chem. Phys., 16 (1948) 490–495.
  57. J. Toth, State equations of the solid-gas interface layers, Acta Chim. Acad. Sci. Hung., 69 (1971) 311–328.
  58. O. Redlich, D.L. Peterson, A useful adsorption isotherm, J. Phys. Chem., 63 (1959) 1024.
  59. A.R. Khan, I.R. Al-Waheab, A. Al-Haddad, A generalized equation for adsorption isotherms for multi-component organic pollutants in dilute aqueous solution, Environ. Technol., 17 (1996) 13–23.
  60. The R Development Core Team, The R Foundation for Statistical Computing, R version 3.0.2, 2013.
  61. M.J. Shadbad, A. Mohebbi, A. Soltani, Mercury(II) removal from aqueous solutions by adsorption on multi-walled carbon nanotubes, Korean J. Chem. Eng., 28 (2011) 1029–1034.
  62. M. Hadavifar, N. Bahramifar, H. Younesi, Q. Li, Adsorption of mercury ions from synthetic and real wastewater aqueous solution by functionalized multi-walled carbon nanotube with both amino and thiolated groups, Chem. Eng. J., 237 (2014) 217–228.
  63. R.M. Smith, A.E. Martell, Critical Stability Constants, Vol. 6, Plenum Press, New York, 1976.
  64. P. Gans, Hyperquad Simulation and Speciation: HySS, version 4.0.31, 2009.
  65. P.A. Chen, C.-F. Hsu, D.-W. Tsai, Y.-M. Lu, W.-J. Huang, Adsorption of mercury from water by modified multiwalled carbon nanotubes: adsorption behaviour and interference resistance by coexisting anions, Environ. Technol., 35 (2014) 1935–1944.
  66. M.A. Tofighy, T. Mohammadi, Adsorption of divalent heavy metal ions from water using carbon nanotube sheets, J. Hazard. Mater., 185 (2011) 140–147.
  67. G.D. Vukovic, A.D. Marinkovic, M. Coli, M.D. Ristic, R. Aleksic, A.A. Peric-Gruji, P.S. Uskokovic, Removal of cadmium from aqueous solutions by oxidized and ethylenediaminefunctionalized multi-walled carbon nanotubes, Chem. Eng. J., 157 (2010) 238–248.
  68. S.G. Muntean, M.E. Radulescu-Grad, P. Sfarloaga, Dye adsorbed on copolymer, possible specific sorbent for metal ions removal, RSC Adv., 4 (2014) 27354–27362.
  69. C.H. Wu, Adsorption of reactive dye onto carbon nanotubes: equilibrium, kinetics and thermodynamics, J. Hazard. Mater., 144 (2007) 93–100.
  70. B. Yu, Y. Zhang, A. Shukla, S.S. Shukla, K.L. Dorris, The removal of heavy metal from aqueous solutions by sawdust adsorption – removal of copper, J. Hazard. Mater., 80 (2000) 33–42.
  71. C.-Y. Kuo, H.-Y. Lin, Adsorption of aqueous cadmium (II) onto modified multi-walled carbon nanotubes following microwave/chemical treatment, Desalination, 249 (2009) 792–796.
  72. H.-H. Cho, K. Wepasnick, B.A. Smith, F.K. Bangash, D.H. Fairbrother, W.P. Ball, Sorption of aqueous Zn[II] and Cd[II] by multiwall carbon nanotubes: the relative roles of oxygencontaining functional groups and graphenic carbon, Langmuir, 26 (2009) 967–981.
  73. Y.-H. Li, J. Ding, Z. Luan, Z. Di, Y. Zhu, C. Xu, D. Wu, B. Wei, Competitive adsorption of Pb2+, Cu2+ and Cd2+ ions from aqueous solutions by multiwalled carbon nanotubes, Carbon, 41 (2003) 2787–2792.
  74. T.A. Saleh, Isotherm, kinetic, and thermodynamic studies on Hg(II) adsorption from aqueous solution by silica-multiwalled carbon nanotubes, Environ. Sci. Pollut. Res., 22 (2015) 1–11.
  75. K. Yaghmaeian, R.K. Mashizi, S. Nasseri, A.H. Mahvi, M. Alimohammadi, S. Nazmara, Removal of inorganic mercury from aquatic environments by multi-walled carbon nanotubes, J. Environ. Health Sci. Eng., 13 (2015) 1–9.
  76. A. Gupta, S. Vidyarthi, N. Sankararamakrishnan, Enhanced sorption of mercury from compact fluorescent bulbs and contaminated water streams using functionalized multiwalled carbon nanotubes, J. Hazard. Mater., 274 (2014) 132–144.
  77. O. Soon-An, S. Chye-Eng, L. Poh-Eng, Kinetics of adsorption of Cu(II) and Cd(II) from aqueous solution on rice husk and modified rice husk, Electron. J. Environ. Agric. Food Chem., 6 (2007) 764–1774.
  78. F. Krika, N. Azzouz, M.C. Ncibi, Adsorptive removal of cadmium from aqueous solution by cork biomass: equilibrium, dynamic and thermodynamic studies, Arab. J. Chem., 9 (2016) S1077–S1083.
  79. S.O. Akpotu, B. Moodley, Synthesis and characterization of citric acid grafted MCM-41 and its adsorption of cationic dyes, J. Environ. Chem. Eng., 4 (2016) 4503–4513.
  80. I.A.A. Hamza, B.S. Martincigh, J.C. Ngila, V.O. Nyamori, Adsorption studies of aqueous Pb(II) onto a sugarcane bagasse/multi-walled carbon nanotube composite, Phys. Chem. Earth, 66 (2013) 157–166.
  81. R. Djeribi, Q. Hamdaoui, Sorption of copper(II) from aqueous solutions by cedar sawdust and crushed brick, Desalination, 225 (2008) 95–112.
  82. S.K. Milonjić, A consideration of the correct calculation of thermodynamic parameters of adsorption, J. Serb. Chem. Soc., 72 (2007) 1363–1367.
  83. Y. Liu, Y.-J. Liu, Biosorption isotherms, kinetics and thermodynamics, Sep. Purif. Technol., 61 (2008) 229–242.
  84. S. Saber-Samandari, M. Gazi, Removal of mercury(II) from aqueous solution using chitosan-graft-polyacrylamide semi-IPN hydrogels, Sep. Sci. Technol., 48 (2013) 1382–1390.
  85. S. Srivastava, Sorption of divalent metal ions from aqueous solution by oxidized carbon nanotubes and nanocages: a review, Adv. Mater. Lett., 4 (2013) 2–8.