References
  -  Z.H. Lu, G.J. Liu, S. Duncan, Poly(2-hydroxyethyl acrylatecomethyl
	  acrylate)/SiO2/TiO2 hybrid membranes, J. Membr. Sci.,
  221 (2003) 113–122. 
-  C.H. Guizard, A. Bac, M. Barboiu, Hybrid organic-inorganic
    membranes with specific transport properties: applications
    in separation and sensors technologies, Sep. Purif. Technol.,
    25 (2001) 167–180. 
-  A. Taniguchi, M. Cakmak, The suppression of strain induced
    crystallization in PET through submicron TiO2 particle
  incorporation, Polymer, 45 (2004) 6647–6654. 
-  P.C. Chiang, W.T. Whang, M.H. Tsai, S.C. Wu, Physical and
    mechanical properties of polyimide/titania hybrid films,
    Thin Solid Films, 447 (2004) 359–364. 
-  C. Garcia, E. Rogel-Hernández, S.W. Lin, H. Espinoza-Gómez,
    Natural organic matter fouling using a cellulose acetate
    copolymer ultrafiltration membrane, Desal. Water Treat.,
    1 (2009) 150–156. 
-  H. Dong, K.J. Xiao, X.L. Li, Y. Ren, S.Y. Guo, Preparation of
    PVDF/Al2O3 hybrid membrane via the sol–gel process and
    characterization of the hybrid membrane, Desal. Water Treat.,
  51 (2013) 3685–3690. 
-  L. Sauguet, C. Boyer, B. Ameduri, B. Boutevin, Synthesis and
    characterization of poly(vinylidene fluoride)-g-poly(styrene)
    graft polymers obtained by atom transfer radical polymerization
    of styrene, Macromolecules, 39 (2006) 9087–9101. 
-  L. Yan, Y.S. Li, C.B. Xiang, S. Xianda, Effect of nano-sized
    Al2O3-particle addition on PVDF ultrafiltration membrane
  performance, J. Membr. Sci., 276 (2006) 162–167. 
-  X.C. Cao, J. Ma, X.H. Shi, Z.J. Ren, Effect of TiO2 nanoparticles
    size on the performance of PVDF membrane, J. Appl. Surf. Sci.,
  253 (2006) 2003–2010. 
-  A. Bottino, G. Capannelli, A. Comite, Preparation and
    characterization of novel porous PVDF-ZrO2 composite
  membranes, Desalination, 146 (2002) 35–40. 
-  L.Y. Yu, Z.L. Xu, H.M. Shen, H. Yang, Preparation and
    characterization of PVDF-SiO2 composite hollow fiber UF
  membrane by sol-gel method, J. Membr. Sci., 337 (2009) 257–265. 
-  J.W. Cho, K.I. Sul, Characterization and properties of
    hybrid composites prepared from poly(vinylidene fluoridetetrafluoroethylene)
  and SiO2, Polymers, 42 (2001) 727–736. 
-  R.A. Zoppi, C.G.A. Soares, Hybrids of poly(ethylene oxidebamide-6) and ZrO2 sol–gel: preparation, characterization,
    and application in processes of membrane separation,
  Adv. Polym. Technol., 21 (2002) 2–16. 
-  J.H. Kim, Y.M. Lee, Gas permeation properties of poly(amide-6-b-ethylene oxide)-silica hybrid membranes, J. Membr. Sci.,
    193 (2001) 209–225. 
-  I. Zawierucha, C. Kozlowski, G. Malin, Immobilized materials
    for removal of toxic metal ions from surface/groundwaters
    and aqueous waste streams, Environ. Sci. Processes Impacts,
    18 (2016) 429–444. 
-  L. Yan, Y.S. Li, C.B Xiang, Preparation of poly(vinylidene
    fluoride) (PVDF) ultrafiltration membrane modified by nanosized
    alumina (Al2O3) and its antifouling research, Polymers,
  46 (2005) 7701–7706. 
-  S.H. Abdel-Halim, A.M.A. Shehata, M.F. El-Shahat, Removal
    of lead ions from industrial wastewater by different types of
    natural materials, Water Res., 37 (2003) 1678–1683. 
-  M. Nakada, K. Fukaya, S. Takeshita, Y. Wadd, The accumulation
    of heavy metals in the submerged plants (Elodea nuttallii),
    Bull. Environ. Contam. Toxicol., 22 (1979) 21–26. 
-  D.L. Tsalev, Z.K. Zaprianov, AAS in Occupational and
    Environmental Health Practice, 2nd ed., CRC Press, Boca
    Raton, FL, 1985, p. 109. 
-  T. Maruyama, S.A. Hannah, J.M. Cohen, Metals removal by
    physical and chemical treatment processes, J. Water Pollut.
    Contam. Fed., 47 (1975) 962–975. 
-  K.H. Park, M.A. Park, H. Jang, E.K. Kim, Y.H. Kim, Removal
    of heavy metals, cadmium II and lead II ions in water by
    Sargassum herneri, Anal. Sci. Technol., 12 (1999) 196–202. 
-  D. Petruzzelli, M. Pagano, G. Triavanti, R. Passino, Lead
    removal and recovery from battery waste waters by natural
    zeolite clinoptilolite, Solvent Extr. Ion Exch., 17 (1999) 677–694. 
-  H. Faghihian, M. Ghannadi-Marageh, H. Kazemian, The use
    of clinoptilolite of radioactive cesium and strontium from
    nuclear wastewater and lead, nickel, cadmium, barium from
    municipal wastewater, Sep. Sci. Technol., 34 (1999) 2275–2292. 
-  A. Vecchio, C. Finoli, D. Di-Simine, V. Andreoni, Heavy
    metal biosorption by bacterial cells, Fresenius J. Anal. Chem.,
    361 (1998) 338–342. 
-  R.K. Srivastav, S.K. Gupta, K.D.P. Nigam, P. Vasudevan,
    Use of aquatic plants for the removal of heavy metals from
    waste waters, Int. J. Environ. Stud., 45 (1993) 43–50. 
-  C. Namasivayam, K. Ranganathan, Removal of Cd(II) from
	  waste water by adsorption on waste FeIII/CrIII hydroxide,
  Water Res., 29 (1995) 1737–1744. 
-  M.T. Laumakis, P.J. Martin, S. Pamucku, K. Owens, Proceeding
    of the International Conference on Hazard Waste Management,
    ASCE, New York, 1995, pp. 528–535. 
-  X. Zhang, Y. Wang, Y. Liu, J. Xu, Y. Han, X. Xu, Preparation,
    performances of PVDF/ZnO hybrid membranes and their
    applications in the removal of copper ions, Appl. Surf. Sci.,
    316 (2014) 333–340. 
-  X. Sun, H. Shiraz, R. Wong, J. Zhang, J. Liu, J. Lu, N. Meng,
    Enhancing the performance of PVDF/GO ultrafiltration
    membrane via improving the dispersion of GO with
    homogeniser, Membranes, 12 (2022) 1268, doi: 10.3390/membranes12121268. 
-  Y. Zhang, Y. Hu, Y. Zhang, S. Liu, TiO2/void/porous Al2O3
    shell embedded in polyvinylidene fluoride film for cleaning
    wastewater, Adv. Powder Technol., 29 (2018) 1582–1590. 
-  D. Wei, S. Zhou, M. Li, A. Xue, Y. Zhang, Y. Zhao, J. Zhong,
    D. Yang, PVDF/palygorskite composite ultrafiltration
    membranes: effects of nano-clay particles on membrane
    structure and properties, Appl. Clay Sci., 181 (2019) 105171,
    doi: 10.1016/j.clay.2019.105171. 
-  X.S. Yi, W.X. Shi, S.L. Yu, C. Ma, N. Sun, S. Wang, L.M. Jin,
    L.P. Sun, Optimization of complex conditions by response
    surface methodology for APAM–oil/water emulsion removal
    from aqua solutions using nano-sized TiO2/Al2O3 PVDF
    ultrafiltration membrane, J. Hazard. Mater., 193 (2011) 37–44. 
-  R. Gregorio, R.C. Capitao, Morphology and phase transition of
    high melt temperature crystallized poly(vinylidene fluoride),
    J. Mater. Sci., 35 (2000) 299–306. 
-  A. Salimi, A.A. Yousefi, FT-IR studies of β-phase crystal
    formation in stretched PVDF films, Polym. Test., 22 (2003)
    699–704. 
-  T. Bocaccio, A. Bottino, G. Capanelli, P. Piaggio, Characterization
    of PDVF membranes by vibrational spectroscopy, J. Membr.
    Sci., 210 (2002) 315–329. 
-  M.A. Qing, Synthesis of alumina-silicon dioxide nano powders
    via sol–gel process, J. Nat. Univ. Defense Technol., 24 (2002)
    25–28. 
-  T. Ogoshi, Y. Chujo, Synthesis of poly(vinylidene fluoride)
    (PVDF)/silica hybrids having interpenetrating polymer
    network structure by using crystallization between PVDF
    chains, J. Polym. Sci., Part A: Polym. Chem., 43 (2005)
    3543–3550. 
-  W. Li, H. Li, Y.M. Zhang, Preparation and investigation of
    PVDF/PMMA/TiO2 composite film, J. Mater. Sci., 44 (2009)
    2977–2984. 
-  F. Tibi, S.J. Park, J. Kim, Improvement of membrane distillation
    using PVDF membrane incorporated with TiO2 modified by
    silane and optimization of fabricating conditions, Membr. J.,
    11 (2021) 1–18. 
-  L. Huang, J.T. Arena, J.R. McCutcheon, Surface modified
    PVDF nanofiber supported thin film composite membranes
    for forward osmosis, J. Membr. Sci., 499 (2016) 352–360. 
-  X. Yue, X. Ji, H. Xu, B. Yang, M. Wang, Y. Yang, Performance
    investigation on GO-TiO2/PVDF composite ultrafiltration
    membrane for slightly polluted ground water treatment,
    Energy, 273 (2023) 127215, doi: 10.1016/j.energy.2023.127215. 
-  W. Xie, W. Song, J. Li, X. Zhang, W. Dong, F. Sun, Micropolluted
    water resources treatment by PVDF-TiO2 membrane
	  combined with Fe2+/sodium dithionite (DTN)/O2 pre-oxidation
    process, Chemosphere, 311 (2023) 136998, doi: 10.1016/j.chemosphere.2022.136998. 
-  J. Wang, W. Xu, L. Chen, X. Huang, J. Liu, Preparation and
    evaluation of magnetic nanoparticles impregnated chitosan
    beads for arsenic removal from water, Chem. Eng. J., 251 (2014)
    25–34. 
-  I. Qureshi, S. Memona, M. Yilmaz, An excellent arsenic(V)
    sorption behavior of p-tert-butylcalix[8]areneoctamide
    impregnated resin, C.R. Chim., 13 (2010) 1416–1423. 
-  M.S. Podder, C.B. Majumder, Fixed-bed column study for
    As(III) and As(V) removal and recovery by bacterial cells
    immobilized on sawdust/MnFe2O4 composite, Biochem. Eng. J.,
    105 (2016) 114–135. 
-  I. Zawierucha, C. Kozlowski, G. Malina, Removal of toxic
    metal ions from landfill leachate by complementary sorption
    and transport across polymer inclusion membranes,
    Waste Manage., 33 (2013) 2129–2136. 
-  X. Hu, Y. Li, Y. Wang, X. Li, H. Li, X. Liu, P. Zhang, Adsorption
    kinetics, thermodynamics and isotherm of thiacalix[4]arene-loaded
    resin to heavy metal ions, Desalination, 259 (2010) 76–83. 
-  I. Zawierucha, J. Kozlowska, C. Kozlowski, A. Trochimczuk,
    Sorption of Pb(II), Cd(II) and Zn(II) performed with the use of
    carboxyphenylresorcinarene-impregnated Amberlite XAD-4
    resin, Desal. Water Treat., 52 (2014) 314–323. 
-  M. Zendehdel, B. Shoshtari‑Yeganeh, G. Cruciani, Removal
    of heavy metals and bacteria from aqueous solution by novel
    hydroxyapatite/zeolite nanocomposite, preparation and
    characterization, J. Iran. Chem. Soc., 13 (2016) 1915–1930.