1. P. Haynes, Complexity theory and evaluation in public management, Public Manage. Rev., 10 (2008) 401–419.
  2. K.A. Shroff, V.K. Vaidya, Kinetics and equilibrium studies on biosorption of nickel from aqueous solution by dead fungal biomass of Mucor hiemalis, Chem. Eng. J., 171 (2011) 1234–1245.
  3. Z. Li, Z. Ma, T.J. van der Kuijp, Z. Yuan, L. Huang, A review of soil heavy metal pollution from mines in China: pollution and health risk assessment, Sci. Total Environ., 468–469 (2014) 843–853.
  4. D. Sud, G. Mahajan, M. Kaur, Agricultural waste material as potential adsorbent for sequestering heavy metal ions from aqueous solutions – a review, Bioresour. Technol., 99 (2008) 6017–6027.
  5. A. Saravanan, P.S. Kumar, M. Yashwanthraj, Sequestration of toxic Cr (VI) ions from industrial wastewater using waste biomass: a review, Desal. Wat. Treat., 68 (2017) 245–266.
  6. WHO, Guidelines for Drinking-Water Quality, World Health Organization, Geneva, Switzerland, 2011.
  7. M. Thommes, K. Kaneko, A.V. Neimark, J.P. Olivier, F. Rodriguez-Reinoso, J. Rouquerol, K.S.W. Sing, Physisorption of gases, with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report), Pure Appl. Chem., 87 (2015), doi:
  8. Y. Sun, J. Cheng, Hydrolysis of lignocellulosic materials for ethanol production: a review, Bioresour. Technol., 83 (2002) 1–11.
  9. W.S. Wan Ngah, M.A.K.M. Hanafiah, Removal of heavy metal ions from wastewater by chemically modified plant wastes as adsorbents: a review, Bioresour. Technol., 99 (2008) 3935–3948.
  10. A.A. Abia, E.D. Asuquo, Lead(II) and nickel(II) adsorption kinetics from aqueous metal solutions using chemically modified and unmodified agricultural adsorbents, Afr. J. Biotechnol., 5 (2006) 1475–1482.
  11. S.H. Min, J.S. Han, E.W. Shin, J.K. Park, Improvement of cadmium ion removal by base treatment of juniper fiber, Water Res., 38 (2004) 1289–1295.
  12. F.A. Chowdhury, M. Azizur Raman, A. Jabbar Mian, Distribution of free sugars and fatty acids in jackfruit (Artocarpus heterophyllus), Food Chem., 60 (1997) 25–28.
  13. N. Priyantha, P.A. Kotabewatta, Biosorption of heavy metal ions on peel of Artocarpus nobilis fruit: 1—Ni(II) sorption under static and dynamic conditions, Appl. Water Sci., 9 (2019) 1–10.
  14. U. Farooq, J.A. Kozinski, M.A. Khan, M. Athar, Biosorption of heavy metal ions using wheat based biosorbents – a review of the recent literature, Bioresour. Technol., 101 (2010) 5043–5053.
  15. K. Harsha, P. Senthil, R.C. Panda, A review on heavy metal pollution, toxicity and remedial measures : current trends and future perspectives, J. Mol. Liq., 290 (2019) 111197.
  16. A.K. Meena, K. Kadirvelu, G.K. Mishra, C. Rajagopal, P.N. Nagar, Adsorptive removal of heavy metals from aqueous solution by treated sawdust (Acacia arabica), J. Hazard. Mater., 150 (2008) 604–611.
  17. D.K.V. Ramana, D.H.K. Reddy, B.N. Kumar, Y. Harinath, K. Seshaiah, Removal of nickel from aqueous solutions by citric acid modified Ceiba pentandra hulls: equilibrium and kinetic studies, Can. J. Chem. Eng., 90 (2012) 111–119.
  18. M. Kazemipour, M. Ansari, S. Tajrobehkar, Removal of lead, cadmium, zinc, and copper from industrial wastewater by carbon developed from walnut, hazelnut, almond, pistachio shell, and apricot stone, J. Hazard. Mater., 150 (2008) 322–327.
  19. Y. Yukselen, A. Kaya, Suitability of the methylene blue test for surface area, cation exchange capacity and swell potential determination of clayey soils, Eng. Geol., 102 (2008) 38–45.
  20. M.B. Shakoor, N.K. Niazi, I. Bibi, M. Shahid, M. Farrakh, S.M. Shaheen, H. Wang, D.C.W. Tsang, J. Bundschuh, Y. Sik, J. Rinklebe, Exploring the arsenic removal potential of various biosorbents from water, Environ. Int., 123 (2019) 567–579.
  21. Z. Cheng, A. Lai, K. Tan, Y. Tao, D. Shan, K.E. Ting, X.J. Yin, Synthesis and characterization of iron oxide nanoparticles and applications in the removal of heavy metals from industrial wastewater, Int. J. Photoenergy, 2012 (2012) 5.
  22. I. Persson, Hydrated metal ions in aqueous solution: how regular are their structures?, Pure Appl. Chem., 82 (2010) 1901–1917.
  23. B. Inbaraj, Carbonised jackfruit peel as an adsorbent for the removal of Cd(II) from aqueous solution, Bioresour. Technol., 94 (2004) 49–52.
  24. C.H. Weng, Y.T. Lin, T.W. Tzeng, Removal of methylene blue from aqueous solution by adsorption onto pineapple leaf powder, J. Hazard. Mater., 170 (2009) 417–424.
  25. E.I. Unuabonah, G.U. Adie, L.O. Onah, O.G. Adeyemi, Multistage optimization of the adsorption of methylene blue dye onto defatted Carica papaya seeds, Chem. Eng. J., 155 (2009) 567–579.
  26. J.R. Peralta-videa, M. Laura, M. Narayan, G. Saupe, J. Gardeatorresdey, The biochemistry of environmental heavy metal uptake by plants: implications for the food chain, Int. J. Biochem. Cell Biol., 41 (2009) 1665–1677.
  27. N.P. Raval, P.U. Shah, N.K. Shah, Adsorptive removal of nickel (II) ions from aqueous environment: a review, J. Environ. Manage., 179 (2016) 1–20.
  28. A. Sen, H. Pereira, M.A. Olivella, I. Villaescusa, Heavy metals removal in aqueous environments using bark as a biosorbent, Int. J. Environ. Sci. Technol., 12 (2015) 391–404.
  29. H. Li, X. Dong, B. Evandro, L.M. De Oliveira, Y. Chen, L.Q. Ma, Mechanisms of metal sorption by biochars: biochar characteristics and modifications, Chemosphere, 178 (2017) 466–478.
  30. E. Pehlivan, T. Altun, Modified barley straw as a potential biosorbent for removal of copper ions from aqueous solution, Food Chem., 135 (2012) 2229–2234.
  31. A. Kurniawan, A.N. Kosasih, J. Febrianto, Y.-H. Ju, J. Sunarso, N. Indraswati, S. Ismadji, Evaluation of cassava peel waste as lowcost biosorbent for Ni-sorption: equilibrium, kinetics, thermodynamics and mechanism, Chem. Eng. J., 172 (2011) 158–166.
  32. A. Demirbas, Heavy metal adsorption onto agro-based waste materials: a review, J. Hazard. Mater., 157 (2008) 220–229.
  33. N. Unlu, M. Ersoz, Adsorption characteristics of heavy metal ions onto a low-cost biopolymeric sorbent from aqueous solutions, J. Hazard. Mater., 136 (2006) 272–280.
  34. L.B.L. Lim, N. Priyantha, C. Hei Ing, M. Khairud Dahri, D.T.B. Tennakoon, T. Zehra, M. Suklueng, Artocarpus odoratissimus skin as a potential low-cost biosorbent for the removal of methylene blue and methyl violet 2B, Desal. Wat. Treat., 53 (2015) 964–975.
  35. H.I. Chieng, L.B.L. Lim, N. Priyantha, Sorption characteristics of peat from Brunei Darussalam for the removal of rhodamine B dye from aqueous solution: adsorption isotherms, thermodynamics, kinetics and regeneration studies, Desal. Wat. Treat., 55 (2015) 664–677.
  36. F. Haghseresht, G.Q. Lu, Adsorption characteristics of Phenolic compounds onto coal-reject-derived adsorbents, Energ. Fuel, 12 (1998) 1100–1107.
  37. Y. Wu, Y. Fan, M. Zhang, Z. Ming, S. Yang, A. Arkin, Functionalized agricultural biomass as a low-cost adsorbent: utilization of rice straw incorporated with amine groups for the adsorption of Cr(VI) and Ni(II) from single and binary systems, Biochem. Eng. J., 105 (2016) 27–35.
  38. M. Saleem, N. Wongsrisujarit, S. Boonyarattanakalin, Removal of nickel(II) ion by adsorption on coconut copra meal biosorbent, Desal. Wat. Treat., 57 (2016) 5623–5635.
  39. M. Matouq, N. Jildeh, M. Qtaishat, M. Hindiyeh, M.Q. Al, The adsorption kinetics and modeling for heavy metals removal from wastewater by Moringa pods, J. Environ. Chem. Eng., 3 (2015) 775–784.
  40. M. Alomá, M.A. Martín-Lara, I.L. Rodríguez, G. Blázquez, M. Calero, Removal of nickel (II) ions from aqueous solutions by biosorption on sugarcane bagasse, J. Taiwan Inst. Chem. Eng., 43 (2012) 275–281.
  41. M.M. Montazer-rahmati, P. Rabbani, A. Abdolali, A. Reza, Kinetics and equilibrium studies on biosorption of cadmium, lead, and nickel ions from aqueous solutions by intact and chemically modified brown algae, J. Hazard. Mater., 185 (2011) 401–407.
  42. K.K. Krishnani, X. Meng, C. Christodoulatos, V.M. Boddu, Biosorption mechanism of nine different heavy metals onto biomatrix from rice husk, J. Hazard. Mater., 153 (2008) 1222–1234.
  43. C.C.V. Cruz, A.C.A. da Costa, C.A. Henriques, A.S. Luna, Kinetic modeling and equilibrium studies during cadmium biosorption by dead Sargassum sp. biomass, Bioresour. Technol., 91 (2004) 249–257.
  44. F. Wu, R. Tseng, R. Juang, Initial behavior of intraparticle diffusion model used in the description of adsorption kinetics, Chem. Eng. J., 153 (2009) 1–8.
  45. T.M. Ting, M.M. Nasef, K. Hashim, Evaluation of boron adsorption on new radiation grafted fibrous adsorbent containing N-methyl-D-glucamine, J. Chem. Technol. Biotechnol., 91 (2016) 2009–2017.