1. J. Wang, C. Chen, Biosorbents for heavy metals removal and their future, Biotechnol. Adv., 27 (2009) 195–226.
  2. M. Kılıç, Ç. Kırbıyık, Ö. Çepelioğullar, A.E. Pütün, Adsorption of heavy metal ions from aqueous solutions by bio-char, a by-product of pyrolysis, Appl. Surf. Sci., 283 (2013) 856–862.
  3. A.R. Agg, T.F. Zabel, EC directive on the control of dangerous substances (76/464/EEC): its impact on the UK water industry, Water Environ. J., 3 (1989) 436–442.
  4. ELINCS new substances list, Anal. Proc., 28 (1991) 348.
  5. D. Sud, G. Mahajan, M.P. Kaur, Agricultural waste material as potential adsorbent for sequestering heavy metal ions from aqueous solutions – a review, Bioresour. Technol., 99 (2008) 6017–6027.
  6. H.S. Ernst, K.S. Minamyer, K.R. Fox, EPA Drinking Water Security Research Program, R.M. Clark, S. Hakim, A. Ostfeld, Eds., Handbook of Water and Wastewater Systems Protection, Springer New York, New York, NY, 2011, pp. 47–64.
  7. S.S. Pillai, B. Deepa, E. Abraham, N. Girija, P. Geetha, L. Jacob, M. Koshy, Biosorption of Cd(II) from aqueous solution using xanthated nano banana cellulose: equilibrium and kinetic studies, Ecotoxicol. Environ. Saf., 98 (2013) 352–360.
  8. C. Namasivayam, E.C. Division, Removal of Cd(II) from wastewater by adsorption on “waste” Fe(III)/Cr(III) hydroxide, Water Res., 29 (1995) 1737–1744.
  9. N. Barka, M. Abdennouri, M. El Makhfouk, S. Qourzal, Biosorption characteristics of cadmium and lead onto ecofriendly dried cactus (Opuntia ficus-indica) cladodes, J. Environ. Chem. Eng., 1 (2013) 144–149.
  10. J.-L. Hu, X.-W. He, C.-R. Wang, J.-W. Li, C.-H. Zhang, Cadmium adsorption characteristic of alkali modified sewage sludge, Bioresour. Technol., 121 (2012) 25–30.
  11. W. Zou, H. Bai, S. Gao, Competitive adsorption of neutral red and Cu2+ onto pyrolytic char: isotherm and kinetic study, J. Chem. Eng. Data, 57 (2012) 2792–2801.
  12. S.E.A.S. El-Deen, F.-S. Zhang, Immobilisation of TiO2-nanoparticles on sewage sludge and their adsorption for cadmium removal from aqueous solutions, J. Exp. Nanosci., 11 (2016) 239–258.
  13. S. Ishikawa, N. Ueda, Y. Okumura, Y. Iida, K. Baba, Recovery of coagulant from water supply plant sludge and its effect on clarification, J. Mater. Cycles Waste Manage., 9 (2007) 167–172.
  14. X. Chen, S. Jeyaseelan, N. Graham, Physical and chemical properties study of the activated carbon made from sewage sludge, Waste Manage., 22 (2002) 755–760.
  15. Z. Droussi, V. D’orazio, M.R. Provenzano, M. Hafidi, A. Ouatmane, Study of the biodegradation and transformation of olive-mill residues during composting using FTIR spectroscopy and differential scanning calorimetry, J. Hazard. Mater., 164 (2009) 1281–1285.
  16. J. Pan, G. Li, Z. Chen, X. Chen, W. Zhu, K. Xu, Alternative block polyurethanes based on poly(3-hydroxybutyrate-co-4-hydroxybutyrate) and poly(ethylene glycol), Biomaterials, 30 (2009) 2975–2984.
  17. Q. Chen, D. Yin, S. Zhu, X. Hu, Adsorption of cadmium(II) on humic acid coated titanium dioxide, J. Colloid Interface Sci., 367 (2012) 241–248.
  18. X.J. Beiping Zhang, S. Xiong, B. Xiao, D. Yu, Mechanism of wet sewage sludge pyrolysis in a tubular furnace, Int. J. Hydrogen Energy, 36 (2011) 355–363.
  19. O.R. Harvey, B.E. Herbert, R.D. Rhue, L.-J. Kuo, Metal interactions at the biochar-water interface: energetics and structure-sorption relationships elucidated by flow adsorption microcalorimetry, Environ. Sci. Technol., 45 (2011) 5550–5556.
  20. H.J. Percival, J.F. Duncan, P.K. Foster, Interpretation of the kaolinite-mullite reaction sequence from infrared absorption spectra, J. Am. Ceram. Soc., 57 (1974) 57–61.
  21. G. Liu, H. Song, J. Wu, Thermogravimetric study and kinetic analysis of dried industrial sludge pyrolysis, Waste Manage., 41 (2015) 128–133.
  22. L. Gu, N. Zhu, H. Guo, S. Huang, Z. Lou, H. Yuan, Adsorption and Fenton-like degradation of naphthalene dye intermediate on sewage sludge derived porous carbon, J. Hazard. Mater., 246–247 (2013) 145–153.
  23. R. Haul, S.J. Gregg, K.S.W. Sing, Adsorption, Surface Area and Porosity. 2. Auflage, Academic Press, London 1982. 303 Seiten, Berichte Der Bunsengesellschaft Für Phys. Chemie., 86 (1982) 957.
  24. T. Sivakumar Natarajan, H.C. Bajaj, R.J. Tayade, Synthesis of homogeneous sphere-like Bi2WO6 nanostructure by silica protected calcination with high visible-light-driven photocatalytic activity under direct sunlight, Cryst. Eng. Comm., 17 (2015) 1037–1049.
  25. I. Langmuir, The adsorption of gases on plane surfaces of glass, mica and platinum, J. Am. Chem. Soc., 40 (1918) 1361–1403.
  26. H.M.F. Freundlich, Over the adsorption in solution, J. Phys. Chem., 57 (1906) 385–471.
  27. B.H. Hameed, A.A. Rahman, Removal of phenol from aqueous solutions by adsorption onto activated carbon prepared from biomass material, J. Hazard. Mater., 160 (2008) 576–581.
  28. Langmuir Irving, The adsorption of gases on plane surfaces of glass, mica and platinum, J. Am. Chem. Soc., 40 (1918) 1361.
  29. B.H. Hameed, D.K. Mahmoud, A.L. Ahmad, Sorption equilibrium and kinetics of basic dye from aqueous solution using banana stalk waste, J. Hazard. Mater., 158 (2008) 499–506.
  30. L.S, Zur theorie der sogenannten adsorption gelöster stoffe [On the theory of so-called adsorption of dissolved substances], K. Sven. Vetensk.akad., Handl., 24 (1898) 1.
  31. Y. Khambhaty, K. Mody, S. Basha, B. Jha, Kinetics, equilibrium and thermodynamic studies on biosorption of hexavalent chromium by dead fungal biomass of marine Aspergillus niger, Chem. Eng. J., 145 (2009) 489–495.
  32. W.J. Weber, J.C. Morris, Kinetics of adsorption carbon from solutions, J. Sanit. Eng. Div. Proc. Am. Soc. Civ. Eng., 89 (1963) 31–60.
  33. L. Khalfa, M. Bagane, Cadmium removal from aqueous solution by a Tunisian smectitic natural and activated clay: thermodynamic study, J. Encapsulation Adsorpt. Sci., 1 (2011) 65–71.
  34. R.R. Sheha, A.A. El-Zahhar, Synthesis of some ferromagnetic composite resins and their metal removal characteristics in aqueous solutions, J. Hazard. Mater., 150 (2008) 795–803.
  35. R. Vimala, N. Das, Biosorption of cadmium (II) and lead (II) from aqueous solutions using mushrooms: a comparative study, J. Hazard. Mater., 168 (2009) 376–382.
  36. N. Li, L. Zhang, Y. Chen, Y. Tian, H. Wang, Adsorption behavior of Cu(II) onto titanate nanofibers prepared by alkali treatment, J. Hazard. Mater., 189 (2011) 265–272.
  37. M.H. Kalavathy, T. Karthikeyan, S. Rajgopal, L.R. Miranda, Kinetic and isotherm studies of Cu(II) adsorption onto H3PO4-activated rubber wood sawdust, J. Colloid Interface Sci., 292 (2005) 354–362.
  38. P. Liang, T. Shi, J. Li, Nanometer-size titanium dioxide separation/preconcentration and FAAS determination of trace Zn and Cd in water sample, Int. J. Environ. Anal. Chem., 84 (2004) 315–321.
  39. 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.
  40. T. Phuengprasop, J. Sittiwong, F. Unob, Removal of heavy metal ions by iron oxide coated sewage sludge, J. Hazard. Mater., 186 (2011) 502–507.
  41. T. Chen, Y. Zhang, H. Wang, W. Lu, Z. Zhou, Y. Zhang, L. Ren, Influence of pyrolysis temperature on characteristics and heavy metal adsorptive performance of biochar derived from municipal sewage sludge, Bioresour. Technol., 164 (2014) 47–54.
  42. T.J. Bandosz, Activated carbon surfaces in environmental remediation, Interface Sci. Technol., 7 (2006) 571.
  43. J.R. Memon, S.Q. Memon, M.I. Bhanger, G.Z. Memon, A. El-Turki, G.C. Allen, Characterization of banana peel by scanning electron microscopy and FT-IR spectroscopy and its use for cadmium removal, Colloids Surf., B, 66 (2008) 260–265.
  44. E. Pehlivan, B.H. Yanık, G. Ahmetli, M. Pehlivan, Equilibrium isotherm studies for the uptake of cadmium and lead ions onto sugar beet pulp, Bioresour. Technol., 99 (2008) 3520–3527.
  45. A. Saeed, M. Iqbal, Bioremoval of cadmium from aqueous solution by black gram husk (Cicer arientinum), Water Res., 37 (2003) 3472–3480.
  46. N. Barka, M. Abdennouri, A. Boussaoud, M.E.L. Makhfouk, Biosorption characteristics of cadmium(II) onto Scolymus hispanicus L. as low-cost natural biosorbent, Desalination, 258 (2010) 66–71.
  47. K. Kadirvelu, C. Namasivayam, Activated carbon from coconut coirpith as metal adsorbent: adsorption of Cd(II) from aqueous solution, Adv. Environ. Res., 7 (2003) 471–478.
  48. A. Kamari, S.N.M. Yusoff, F. Abdullah, W.P. Putra, Biosorptive removal of Cu(II), Ni(II) and Pb(II) ions from aqueous solutions using coconut dregs residue: adsorption and characterisation studies, J. Environ. Chem. Eng., 2 (2014) 1912–1919.
  49. D. Ova, B. Ovez, 2,4-Dichlorophenoxyacetic acid removal from aqueous solutions via adsorption in the presence of biological contamination, J. Environ. Chem. Eng., 1 (2013) 813–821.
  50. S.E. Manahan Chemical Analysis of Water and Wastewater, in: Environmental Chemistry, 7th ed., CRC Press, 1999.
  51. S.E. Manahan Analysis of Wastes and Solids, in: Environmental Chemistry, 7th ed., CRC Press, 1999.
  52. E. Gutiérrez-Segura, M. Solache-Ríos, A. Colín-Cruz, C. Fall, Adsorption of cadmium by Na and Fe modified zeolitic tuffs and carbonaceous material from pyrolyzed sewage sludge, J. Environ. Manage., 97 (2012) 6–13.