1. L. Ma, Q. Wang, S.M. Islam, Y. Liu, S. Ma, M.G. Kanatzidis, Highly selective and efficient removal of heavy metals by layered double hydroxide intercalated with the MoS42− ion, J. Am. Chem. Soc., 138 (2016) 2858–2866.
  2. L.L. Ling, W.J. Liu, S. Zhang, H. Jiang, Magnesium oxide embedded nitrogen self-doped biochar composites fast and high-efficiency adsorption of heavy metals in an aqueous solution, Environ. Sci. Technol., 51 (2017) 10081–10089.
  3. H.F. Guo, X.L. Zhang, C.X. Kang, J. Zhang, Z.X. Xu, C.H. Jiang, P.Y. Luo, Z.F. Fu, M.N. Ding, Y.L. Lv, Synthesis of magnetic Fe-doped hydroxyapatite nanocages with highly efficient and selective adsorption for Cd2+, Mater. Lett., 253 (2019) 144–147.
  4. Y. Shen, H. Li, W. Zhu, S.H. Ho, W. Yuan, J. Chen, Y. Xie, Microalgal biochar immobilized complex a novel efficient biosorbent for cadmium removal from aqueous solution, Bioresour. Technol., 244 (2017) 1031–1038.
  5. Y. Kacar, C. Arpa, S. Tan, A. Denizli, O. Genc, M.Y. Arıca, Biosorption of Hg(II) and Cd(II) from aqueous solutions: comparison of biosorptive capacity of alginate and immobilized live and heat-inactivated Phanerochaete chrysosporium, Process Biochem., 37 (2002) 601–610.
  6. J. Liang, X.M. Li, Z.G. Yu, G.M. Zeng, Y. Luo, L.B. Jiang, Z.X. Yang, Y.Y. Qian, H.P. Wu, Amorphous MnO2 modified biochar derived from aerobically composted swine manure for adsorption of Pb(II) and Cd(II), ACS Sustainable Chem. Eng., 5 (2017) 5049–5058.
  7. T.A. Saleh, A.A. Al-Saadi, Surface characterization and sorption efficacy of tire obtained carbon: an experimental and semiempirical study of rhodamine B adsorption, Surf. Interface Anal., 47 (2015) 785–792.
  8. L.Z. Wang, J.F. Guo, X.Y. Xiang, Y.F. Sang, J.H. Huang, Melamine-supported porous organic polymers for efficient CO2 capture and Hg2+ removal, Chem. Eng. J., 387 (2020) 124070.
  9. A.O. Bello, B.S. Tawabini, A.B. Khalil, C.R. Boland, T.A. Saleh, Phytoremediation of cadmium-, lead- and nickel-contaminated water by Phragmites australis in hydroponic systems, Ecol. Eng., 120 (2018) 126–133.
  10. H.A. Sani, M.B. Ahmad, M.Z. Hussein, N.A. Ibrahim, T.A. Saleh, Nanocomposite of ZnO with montmorillonite for removal of lead and copper ions from aqueous solutions, Process Saf. Environ. Prot., 109 (2017) 97–105.
  11. K. Pyrzynska, Removal of cadmium from wastewaters with low-cost adsorbents, J. Environ. Chem. Eng., 7 (2019) 102795.
  12. Y.S. Fetisova, O.A. Dudarko, M. Bauman, A. Lobnik, V.V. Sliesarenko, Adsorption of lead(II), cadmium(II) and dysprosium(III) from aqueous solutions using mesoporous silica modified with phosphonic acid groups, J. Sol-Gel Sci. Technol., 206 (2018) 199–207.
  13. B.M. Babic, S.K. Milonjic, M.J. Polovina, S. Cupic, B.V. Kaludjerovic, Adsorption of zinc, cadmium and mercury ions from aqueous solutions on an activated carbon cloth, Carbon, 40 (2002) 1109–1115.
  14. Y. Shin, G.E. Fryxell, W. Um, K. Parker, S.V. Mattigod, R. Skaggs, Sulfur-functionalized mesoporous carbon, Adv. Funct. Mater., 17 (2007) 2897–2901.
  15. M. Naushad, T. Ahamad, B.M. Al-Maswari, A.A. Alqadami, S.M. Alshehri, Nickel ferrite bearing nitrogen-doped mesoporous carbon as an efficient adsorbent for the removal of highly toxic metal ion from aqueous medium, Chem. Eng. J., 330 (2017) 1351–1360.
  16. A. Shahat, Md. R. Awual, Md. A. Khaleque, Md. Z. Alam, Mu. Naushad, A.M.S. Chowdhury, Large-pore diameter nanoadsorbent and its application for rapid lead(II) detection and removal from aqueous media, Chem. Eng. J., 273 (2015) 286–295.
  17. A.K. Mishra, A.K. Sharma, Synthesis of γ-cyclodextrin/chitosan composities for the efficient removal of Cd(II) from aqueous solution, Int. J. Biol. Macromol., 49 (2011) 504–512.
  18. W. Fu, Z.Q. Huang, Magnetic dithiocarbamate functionalized reduced graphene oxide for the removal of Cu(II), Cd(II), Pb(II), and Hg(II) ions from aqueous solution: synthesis, adsorption, and regeneration, Chemosphere, 209 (2018) 449–456.
  19. S.Z. Guo, K.L. Wu, Y. Gao, L.H. Liu, X.X. Zhu, X.L. Li, F. Zhang, Efficient removal of Zn(II), Pb(II), and Cd(II) in wastewater based on magnetic graphitic carbon nitride materials with enhanced adsorption capacity, J. Chem. Eng., 63 (2018) 3902–3912.
  20. Z. Liu, G. Chen, F. Zhou, J.H. Huang, Imidazolium salt incorporated poly(N-vinylimidazole-co-ethylene glycol dimethacrylate) for efficient adsorption of congo red and Hg2+ from aqueous solution, J. Chem. Eng. Data, 64 (2019) 2627–2633.
  21. M. Naushad, S. Vasudevan, G. Sharma, A. Kumar, Z.A. Alothman, Adsorption kinetics, isotherms, and thermodynamic studies for Hg2+ adsorption from aqueous medium using alizarin red-Sloaded amberlite IRA-400 resin, Desal. Water Treat., 57 (2016) 18551–18559.
  22. M. Naushad, Surfactant assisted nano-composite cation exchanger: development, characterization and applications for the removal of toxic Pb2+ from the aqueous medium, Chem. Eng. J., 235 (2014) 100–108.
  23. B. Aguila, Q. Sun, J. Perman, L. Earl, C. Abney, R. Elzein, R. Schlaf, S.Q. Ma, Efficient mercury capture using functionalized porous organic polymer, Adv. Mater., 29 (2018) 31.
  24. L.S. Shao, M.Q. Liu, Y.F. Sang, J.H. Huang, One-pot synthesis of melamine-based porous polyamides for CO2 capture, Microporous Mesoporous Mater., 285 (2019) 105–111.
  25. X.M. Wang, H. Ou, J.H. Huang, One-pot synthesis of hypercross- linked polymers chemically modified with pyrrole, furan, and thiophene for phenol adsorption from aqueous solution, J. Colloid Interface Sci., 538 (2019) 499–506.
  26. M.B. Feng, P. Zhang, H.C. Zhou, V.K. Sharma, Water-stable metal-organic frameworks for aqueous removal of heavy metals and radionuclides: a review, Chemosphere, 209 (2018) 783–800.
  27. Y.F. Sang, J.H. Huang, Benzimidazole-based hyper-cross-linked poly(ionic liquid)s for efficient CO2 capture and conversion, Chem. Eng. J., 385 (2020) 123973.
  28. G.Z. Kyzas, P.I. Siafaka, D.A. Lambropoulou, N.K. Lazaridis, D.N. Bikiaris, Poly (itaconic acid)-grafted chitosan adsorbents with different cross-linking for Pb(II) and Cd(II) uptake, Langmuir, 30 (2013) 120–131.
  29. R. Karthik, Removal of Pb(II) and Cd(II) ions from aqueous solution using polyaniline grafted chitosan, Chem. Eng. J., 263 (2015) 168–177.
  30. J.J. Zhao, Y.Z. Niu, B. Ren, H. Chen, S.X. Chen, J. Jin, Y. Zhang, Synthesis of Schiff base functionalized superparamagnetic Fe3O4 composites for effective removal of Pb(II) and Cd(II) from aqueous solution, Chem. Eng. J., 347 (2018) 574–584.
  31. G.M. Zeng, Y.Y. Liu, L. Tang, G.D. Yang, Y. Pang, Y. Zhang, Y.Y. Zhou, Z. Li, M.Y. Li, M.Y. Lai, Enhancement of Cd(II) adsorption by polyacrylic acid-modified magnetic mesoporous carbon, Chem. Eng. J., 259 (2015) 163–170.
  32. T.A. Saleh, Simultaneous adsorptive desulfurization of diesel fuel over bimetallic nanoparticles loaded on activated carbon, J. Cleaner Prod., 172 (2018) 2123–2132.
  33. O.S. Taskin, N. Ersoy, A. Aksu, B. Kiskan, N. Balkis, Y. Yagci, Melamine-based microporous polymer for highly efficient removal of copper(II) from aqueous solution, Polym. Int., 65 (2016) 439–445.
  34. Y. He, Q.Q. Liu, F. Liu, C.S. Huang, C.J. Peng, Q. Yang, H.L. Wang, J. Hu, H.L. Liu, Porous organic polymer bifunctionalized with triazine and thiophene groups as a novel adsorbent for removing Cu(II), Microporous Mesoporous Mater., 233 (2016) 10–15.
  35. R.X. Peng, G. Chen, F. Zhou, R.L. Man, J.H. Huang, Catalystfree synthesis of triazine-based porous organic polymers for Hg2+ adsorptive removal from aqueous solution, Chem. Eng. J., 371 (2019) 260–266.
  36. T.A. Saleh, Nanocomposite of carbon nanotubes/silica nanoparticles and their use for adsorption of Pb(II): from surface properties to sorption mechanism, Desal. Water Treat., 57 (2015) 10730–10744.
  37. 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) 1051–1069.
  38. I. Langmuir, The constitution and fundamental properties of solids and liquids Part I. solids, J. Am. Chem. Soc., 38 (1916) 2221–2295.
  39. H.M.F. Freundlich, Over the adsorption in solution, J. Phys. Chem., 57 (1906) 1100–1107.
  40. Q. Li, L. Chai, W. Qin, Cadmium(II) adsorption on esterified spent grain: equilibrium modeling and possible mechanisms, Chem. Eng. J., 197 (2012) 173–180.
  41. A. Chen, G. Zeng, G. Chen, X. Hu, M. Yan, S. Guan, C. Shang, L. Lu, Z. Zhou, G. Xie, Novel thiourea-modified magnetic ionimprinted chitosan/TiO2 composite for simultaneous removal of cadmium and 2,4,-dichlorophenol, Chem. Eng. J., 191 (2012) 85–94.
  42. Z.M. Liu, X. Li, P. Zhan, F.P. Hu, X. Ye, Removal of cadmium and copper from water by a magnetic adsorbent of PFM: adsorption performance and microstructural morphology, Sep. Purif. Technol., 206 (2018) 199–207.
  43. J.Y. He, Y.L. Li, C.M. Wang, K.S. Zhang, D.Y. Lin, L.T. Kong, J.H. Liu, Rapid adsorption of Pb, Cu, and Cd from aqueous solutions by β-cyclodextrin polymers, Appl. Surf. Sci., 426 (2017) 29–39.
  44. M. Madhava Rao, D.K. Ramana, K. Seshaiah, M.C. Wang, S.W. Chang, Removal of some metal ions by activated carbon prepared from Phaseolus aureus hulls, J. Hazard. Mater., 166 (2009) 1006–1013.
  45. L.B. Zhong, J. Yin, S.G. Liu, Q. Liu, Y.S. Yang, Y.M. Zheng, Facile one-pot synthesis of urchin-like Fe-Mn binary oxide nanoparticles for effective adsorption of Cd(II) from water, RSC Adv., 6 (2016) 103438–103445.
  46. X.W. Peng, L.X. Zhong, J.L. Ren, R.C. Sun, Highly effective adsorption of heavy metal ions from aqueous solutions by macroporous xylan-rich hemicelluloses-based hydrogel, J. Agric. Food Chem., 6 (2012) 3909–3916.
  47. P.S. Kumar, S. Ramalingam, R.V. Abhinaya, S.D. Kirupha, A. Murugesan, S. Sivanesan, Adsorption of metal ions onto the chemically modified agricultural waste, Clean-Soil Air Water, 40 (2012) 188–197.
  48. Y.Q. Gan, G. Chen, Y.F. Sang, F. Zhou, R.L. Man, J.H. Huang, Oxygen-rich hyper-cross-linked polymers with hierarchical porosity for aniline adsorption, Chem. Eng. J., 368 (2019) 29–36.
  49. V.K. Gupta, A. Nayak, Cadmium removal and recovery from aqueous solutions by novel adsorbents prepared from orange peel and Fe2O3 nanoparticles, Chem. Eng. J., 180 (2012) 81–90.
  50. M. Torab-Mostaedi, M. Asadollahzadeh, A. Hemmati, A. Khosravi, Equilibrium, kinetic, and thermodynamic studies for biosorption of cadmium and nickel on grapefruit peel, J. Taiwan Inst. Chem. Eng., 44 (2013) 295–302.
  51. S. Lagergren, About the theory of so-called adsorption of soluble substances, Kungliga Svenska Vetenskapsakademiens, Handlingar, 24 (1898) 1–39.
  52. Y.S. Ho, Review of second-order models for adsorption systems, J. Hazard. Mater., 136 (2006) 681–689.