References

1. F.N. Muya, C.E. Sunday, P.P.U.A. Baker, E. Iwuoha, Environmental remediation of heavy metal ions from aqueous solution through hydrogel adsorption: a critical review, Water Sci. Technol., 73 (2016) 983–992.
2. C.M. Monteiro, P.M.L. Castro, F.X. Malcata, Biosorption of zinc ions from aqueous solution by the microalga Scenedesmus obliquus, Environ. Chem. Lett., 9 (2011) 169–176.
3. M. Min, L. Shen, G. Hong, M. Zhu, Y. Zhang, X.W.D.E. Wang, Y.Y.D.E. Chen, B.S. Hsiao, Micro-nano structure poly(ether sulfones)/poly(ethyleneimine) nanofibrous affinity membranes for adsorption of anionic dyes and heavy metal ions in aqueous solution, Chem. Eng. J., 197 (2012) 88–100.
4. Y.X. Liu, X. Wu, D. Yuan, J. Yan, Removal of nickel from aqueous solution using cathodic deposition of nickel hydroxide at a modified electrode, J. Chem. Technol. Biotechnol., 88 (2013) 2193–2200.
5. D. Chen, T. Awut, B. Liu, Y. Ma, T. Wang, I. Nurulla, Functionalized magnetic Fe₃O₄ nanoparticles for removal of heavy metal ions from aqueous solutions, e-Polymers, 16 (2016) 313–322.
6. M. Zhao, Y. Xu, C.G.G.E. Zhang, H. Rong, G. Zeng, New trends in removing heavy metals from wastewater, Appl. Microbiol. Biotechnol., 100 (2016) 6509–6518.
7. R.D.R.R. Dhankhar, A. Hooda, Fungal biosorption – an alternative to meet the challenges of heavy metal pollution in aqueous solutions, Environ. Technol., 32 (2011) 467–491.
8. H. Qi, X. Jiang, D. Zhou, B. Zhu, L. Qin, C. Ma, Y. Ong, Y. Murata, Removal of heavy metals in aqueous solution using Antarctic krill chitosan/hydroxyapatite composite, Fibers Polym.,14 (2013) 1134–1140.
9. K. He, Y. Chen, Z. Tang, Y. Hu, Removal of heavy metal ions from aqueous solution by zeolite synthesized from fly ash, Environ. Sci. Pollut Res., 23 (2016) 2778–2788.
10. R. Kishor, A.K. Ghoshal, APTES grafted ordered mesoporous silica KIT-6 for CO₂ adsorption, Chem. Eng. J., 262 (2015) 882–890.
11. K.G.S. SenGupta, Adsorption of a few heavy metals on natural and modified kaolinite and montmorillonite: a review, Adv. Colloid Interface Sci., 140 (2008) 114–131.
12. R.A. Doong, C.Y. Liao, Enhanced visible-light-responsive photodegradation of bisphenol A by Cu, N-codoped titanate nanotubes prepared by microwave-assisted hydrothermal method, J. Hazard. Mater., 32 (2017) 254–262.
13. A.J.M.B. Junqian Ding, and A.M.Y.A. Chunhe Li, Study of the enhanced visible-light-sensitive photocatalytic activity of Cr₂O₃-loaded titanate nanosheets for Cr(VI) degradation and H₂ generation, Catal. Sci. Technol., 7 (2017) 2283–2297.
14. M.R. Morris, S.R. Pendlebury, J. Hong, S. Dunn, J.R. Durrant, Effect of internal electric fields on charge carrier dynamics in a ferroelectric material for solar energy conversion, Adv. Mater., 28 (2016) 7123–7128.
15. P. Meenakshi, M. Selvaraj, Bismuth titanate as an infrared reflective pigment for cool roof coating, Sol. Energy Mater. Sol. Cells, 174 (2018) 530–537.
16. Q. Tian, Impressive lithium storage properties of layered sodium titanate with hierarchical nanostructures as anode materials for lithium-ion batteries, J. Alloys Compd., 699 (2017) 540–547.
17. Y. Hui, L. Cao, Z. Xu, J.H.C. Huang, H. Ouyang, J. Li, Synthesis of Li₄Ti₅O₁₂ nanoclusters for lithium-ion batteries with excellent electrochemical performances, J. Electroanal. Chem., 763 (2016) 32–36.
18. E. Song, Y. Chen, A. Li, Y. Sun, R. Yang, J. Wang, H. Zhang, J. Li, D. Zhang, Preparation and adsorbing performance of calcium titanate with template method, Mater. Manuf. Processes, 32 (2017) 1428–1434.
19. G. Fan, R. Lin, Z. Su, X. Lin, R.X.A.W. Chen, Removal of Cr(VI) from aqueous solutions by titanate nanomaterials synthesized via hydrothermal method, Can. J. Chem. Eng., 95 (2017) 717–723.
20. J. Huang, Y. Cao, Z. Liu, Z. Deng, W. Wang, Application of titanate nanoflowers for dye removal: a comparative study with titanate nanotubes and nanowires, Chem. Eng. J., 191 (2012) 38–44.
21. M.A.A.L.T. Mohammadi, Adsorption of divalent heavy metal ions from water using carbon nanotube sheets, J. Hazard. Mater., 185 (2011) 140–147.
22. Q. Chen, L.M. Peng, Structure and applications of titanate and related nanostructures, J. Hazard. Mater., 4 (2007) 44–65.
23. B. Filipowicz, M. Pruszyński, S. Krajewski, A. Bilewicz, Adsorption of ¹³⁷Cs on titanate nanostructures, J. Radioanal. Nucl. Chem., 301 (2014) 889–895.
24. L. Xiong, C. Chen, Q.C.A.J. Ni, Adsorption of Pb²⁺ and Cd²⁺ from aqueous solutions using titanate nanotubes prepared via hydrothermal method, J Hazard. Mater., 189 (2011) 741–748.
25. N. Li, L. Zhang, Y. Chen, Y.T.A.H. Wang, Adsorption behavior of Cu²⁺ onto titanate nanofibers prepared by alkali treatment, J. Hazard. Mater., 189 (2011) 265–272.
26. H.H.K.Y. Kochkar, Study of Pd²⁺ adsorption over titanate nanotubes of different diameters, J. Colloid Interface Sci., 331 (2009) 27–31.
27. C. Shi, H. He, Z. Hong, H. Zhan, M. Feng, Effect of HCl posttreatment on morphology of hydrothermally prepared titanate nanomaterials with optical limiting properties, Acta Phys. Chim. Sin., 31 (2015) 1430–1436.
28. L. Xiong, C. Chen, Q.C.A.J. Ni, Adsorption of Pb(II) and Cd(II) from aqueous solutions using titanate nanotubes prepared via hydrothermal method, J. Hazard. Mater., 89 (2011) 741–748.
29. J. Chen, M.C. Che, F. Yan, Synthesis of barium strontium titanate nanopowders by microwave hydrothermal method, Adv. Appl. Ceram., 114 (2015) 344–349.
30. L. Persano, A. Camposeo, C. Tekmen, D. Pisignano, Industrial upscaling of electrospinning and applications of polymer nanofibers: a review, Macromol. Mater. Eng., 298 (2013) 504–520.
31. S. Haider, S. Park, Preparation of the electrospun chitosan nanofibers and their applications to the adsorption of Cu²⁺ and Pb²⁺ ions from an aqueous solution, J. Membr. Sci., 328 (2009) 90–96.
32. M.I. Shariful, S.B. Sharif, J.J.L. Lee, U. Habiba, B.C. Ang, M.A. Amalina, Adsorption of divalent heavy metal ion by mesoporous-high surface area chitosan/poly (ethylene oxide) nanofibrous membrane, Carbohydr. Polym., 157 (2017) 57–64.
33. M.K.E.W. Miyazaki, Protonated titanate nanotubes with lewis and brønsted acidity: relationship between nanotube structure and catalytic activity, Chem. Mater., 25 (2013) 385–393.
34. J. Nian, H. Teng, Hydrothermal synthesis of single-crystalline anatase TiO₂ nanorods with nanotubes as the precursor, J. Phys. Chem. B, 110 (2006) 4193–4198.
35. X. Nie, Y. Teh, Titanate nanotubes as superior adsorbents for removal of lead²⁺ ions from water, Mater. Chem. Phys., 123 (2010) 494–497.
36. Y. Chen, S.S.N.E. Lo, J. Kuo, Pb²⁺ adsorption capacity and behavior of titanate nanotubes made by microwave hydrothermal method, Colloids Surf., A, 361 (2010) 126–131.
37. M. Huang, S. Li, X.G. Li, Longan shell as novel biomacromolecular sorbent for highly selective removal of lead and mercury ions, J. Phys. Chem. B, 114 (2010) 3534–3542.
38. L.Y. Wang, L.Q. Yang, Y.F. Li, Y. Zhang, X.J. Ma, Z. F. Ye, Study on adsorption mechanism of Pb²⁺ and Cu²⁺ in aqueous solution using PS-EDTA resin, Chem. Eng. J., 163 (2010) 364–372.
39. H. Nadaroglu, E.E.A.E. Kalkan, N. Demir, Removal of copper from aqueous solution using red mud, Desalination, 251 (2010) 90–95.
40. S.T.A. Kurniawan, Low-cost adsorbents for heavy metals uptake from contaminated water: a review, J. Hazard. Mater., 97 (2003) 219–243.
41. U. Guyo, Application of response surface methodology for Cd²⁺ adsorption on maize tassel-magnetite nanohybrid adsorbent, J. Environ. Chem. Eng., 3 (2015) 2472–2483.
42. U.G.K.S. Moyo, Removal of nickel²⁺ from aqueous solution by Vigna unguiculata (cowpea) pods biomass, Water Sci. Technol., 73 (2016) 2301–2310.
43. W. Liu, A.G.L. Borthwick, X. Li, J. Ni, High photocatalytic and adsorptive performance of anatase-covered titanate nanotubes prepared by wet chemical reaction, Microporous Mesoporous Mater., 186 (2014) 168–175.
44. J. Huang, Y. Cao, Z.D.A.H. Tong, Formation of titanate nanostructures under different NaOH concentration and their application in wastewater treatment, J. Solid State Chem., 184 (2011) 712–719.
45. B. Buchholcz, E. Varga, T. Varga, K. Plank, J. Kiss, Z. Kónya, Structure and stability of boron doped titanate nanotubes and nanowires, Vacuum, 138 (2017) 120–124.
46. V. Bem, M.C. Neves, M.R. Nunes, A.J. Silvestre, O.C. Monteiro, Influence of the sodium/proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes, Condens. Matter Phys., 232 (2012) 50–56.
47. H.L.R.L. Dana L. Morgan, Implications of precursor chemistry on the alkaline hydrothermal synthesis of titania/titanate nanostructures, J. Phys. Chem. C, 114 (2010) 101–110.
48. W. Liu, X. Zhao, T. Wang, D.Z.A.E. Zhao, J.N.I.P. Ni, Adsorption of U(VI) by multilayer titanate nanotubes: effects of inorganic cations, carbonate and natural organic matter, Chem. Eng. J., 286 (2016) 427–435.
49. T. Wang, W. Liu, N. Xu, J. Ni, Adsorption and desorption of Cd²⁺ onto titanate nanotubes and efficient regeneration of tubular structures, J. Hazard. Mater., 250–251 (2013) 379–386.
50. J. Huang, Y. Cao, Q. Huang, H. He, Y. Liu, W. Guo, M. Hong, High-temperature formation of titanate nanotubes and the transformation mechanism of nanotubes into nanowires, Cryst. Growth Des., 9 (2009) 3632–3637.
51. J. Huang, Y. Cao, Z. Liu, Z. Deng, F. Tang, W. Wang, Efficient removal of heavy metal ions from water system by titanate nanoflowers, Chem. Eng. J., 180 (2012) 75–80.
52. M.M.R.Y. Rafatullah, O. Sulaiman, R. Hashim, A. Ahmad, Adsorption of copper (II), chromium (III), nickel ²⁺ and lead ²⁺ ions from aqueous solutions by meranti sawdust, Chem. Eng. J., 170 (2009) 969–977.
53. S.E.A. Sharaf El-Deen, N.S. Ammar, T.S. Jamil, Adsorption behavior of Co²⁺ and Ni²⁺ from aqueous solutions onto titanate nanotubes, Fullerenes Nanotubes Carbon Nanostruct., 24 (2016) 455–466.
54. P. Gu, J. Xing, T. Wen, R. Zhang, J. Wang, G. Zhao, T. Hayat, Y. Ai, Z. Lin, X. Wang, Experimental and theoretical calculation investigation on efficient Pb²⁺ adsorption on etched Ti₃AlC₂ nanofibers and nanosheets, Environ. Sci. Nano., 5 (2018) 946–955.
55. H. Xin, Y. Jinyue, W. Jingkang, B. Jingtao, X. Chuang, H. Hongxun, Design and synthesis of core–shell Fe3O4@PTMT composite magnetic microspheres for adsorption of heavy metals from high salinity wastewater, Chemosphere, 206 (2018) 513–521.
56. J. Wang, Q. Yang, L. Zhang, M. Liu, N. Hu, W. Zhang, W. Zhu, R. Wang, Y. Suo, J. Wang, A hybrid monolithic column based on layered double hydroxide-alginate hydrogel for selective solid phase extraction of lead ions in food and water samples, Food Chem., 257 (2018) 155–162.
57. Z. Min, L. Yuan, Y. Qili, H. Liulian, C. Lihui, N. Yonghao, X. Huining, Temperature and pH responsive cellulose filament/ poly(NIPAM-co-AAc) hybrids as novel adsorbent towards Pb2+ removal, Carbohydr. Polym., 195 (2018) 495–504.
58. H. Xin, Y. Jinyue, W. Jingkang, B. Jingtao, X. Chuang, H. Hongxun, Design and synthesis of core-shell Fe₃O₄@PTMT composite magnetic microspheres for adsorption of heavy metals from high salinity wastewater, Chemosphere, 206 (2018) 513–521.
59. S. Ma, J. Zhang, D. Sun, G. Liu, Surface complexation modeling calculation of Pb²⁺ adsorption onto the calcined diatomite, Appl. Surf. Sci., 359 (2015) 48–54.
60. W. Liu, T. Wang, A.G.L. Borthwick, Y. Wang, X. Yin, X. Li, J. Ni, Adsorption of Pb²⁺, Cd²⁺, Cu²⁺ and Cr³⁺ onto titanate nanotubes: competition and effect of inorganic ions, Sci. Total Environ., 456–457 (2013) 171–180.
61. W. Liu, P. Zhang, A.G.L. Borthwick, H. Chen, J. Ni, Adsorption mechanisms of thallium(I) and thallium(III) by titanate nanotubes: ion-exchange and co-precipitation, J. Colloid Interface Sci., 423 (2014) 67–75.
62. N. Abdehagh, F. Tezel, J. Thibault, Adsorbent screening for biobutanol separation by adsorption: kinetics, isotherms and competitive effect of other compounds, Adsorption, 19 (2013) 1263–1272.
63. Y.S.H.A. McKay, Sorption of dye from aqueous solution by peat, Chem. Eng. J., 70 (1998) 115–124.
64. W.J. Weber, J.C. Morris, Kinetics of adsorption carbon from solutions, J. Sanit. Eng. Div. Proc., ASCE, 89 (1963) 31–60.
65. B. Chen, Q. Zheng, J. Zhu, J. Li, Z. Cai, L. Chen, S. Gong, Mechanically strong fully biobased anisotropic cellulose aerogels, RSC Adv., 6 (2016) 96518–96526.
66. J.N. Putro, S.P. Santoso, S. Ismadji, Y. Ju, Investigation of heavy metal adsorption in binary system by nanocrystalline cellulose–bentonite nanocomposite: improvement on extended Langmuir isotherm model, Microporous Mesoporous Mater., 246 (2017) 166–177.
67. Z. Min, L. Yuan, Y. Qili, H. Liulian, C. Lihui, N. Yonghao, X. Huining, Temperature and pH responsive cellulose filament/poly (NIPAM-co-AAc) hybrids as novel adsorbent towards Pb²⁺ removal, Carbohydr. Polym., 195 (2018) 495–504.
68. D. Yang, Z. Zheng, H. Liu, H. Zhu, X. Ke, Y. Xu, D.W.A.Y. Sun, Layered titanate nanofibers as efficient adsorbents for removal of toxic radioactive and heavy metal ions from water, J. Phys. Chem. C, 112 (2008) 16275–16280.