ساخت غشای پلی وینیلیدن فلوراید/گرافن اکساید کاهش یافته سنتز شده با روش سبز به‌منظور استفاده در نمک‌زدایی به روش تقطیر غشایی

نوع مقاله : ترویجی

نویسندگان

1 دانشجوی دکتری، مرکز پژوهش و فناوری فرآیند‌های غشایی، دانشکده مهندسی شیمی، دانشگاه علم و صنعت ایران، تهران

2 استاد،مدیر قطب غشا، دانشکده مهندسی شیمی، دانشگاه علم و صنعت ایران، تهران

3 استادیار، دانشکده مهندسی شیمی، دانشگاه علم و صنعت ایران، تهران

چکیده

تقطیر غشایی به‌عنوان یک فناوری غشایی در حال رشد، طی چند دهه گذشته در سراسر جهان موردتوجه قرار گرفته است. با استفاده از فرآیند تقطیر غشایی، نمک‌زدایی آب با شوری بالا امکان‌پذیر است. در این پژوهش، گرافن اکسید کاهش یافته با استفاده از یک روش سبز شیمیایی سنتز شد. سپس ساختار و خواص آن با انجام آنالیزهای FTIR و FESEM ارزیابی شد. در مرحله بعد، گرافن اکسید کاهش یافته سنتز شده بر سطح غشای پلی وینیلیدن فلوراید به روش فیلتراسیون خلأ، لایه نشانی شد. عملکرد غشای مرکب ساخته شده در فرآیند تقطیر غشایی خلأ مورد ارزیابی قرار گرفت و پس‌زنی نمک 99/99 درصد و شار  11/8LMH به دست آمد.

کلیدواژه‌ها


عنوان مقاله [English]

Fabrication of Polyvinylidene Fluoride/Reduced Graphene Oxide Membrane Synthesized with a Green Method for Using in Desalination by Membrane Distillation

نویسندگان [English]

  • Saeed Seraj 1
  • Toraj Mohammadi 2
  • Maryam Ahmadzadeh Tofighy 3
1 PhD Student, Iran University of Science and Technology, Tehran, Iran
2 Distinguished Professor, Iran University of Science and Technology, Tehran, Iran
3 Assistant Professor, Iran University of Science and Technology, Tehran, Iran
چکیده [English]

Membrane distillation, as a growing membrane technology, has gained worldwide attention over the past few decades. It is possible to desalinate seawater by using membrane distillation process. In this project, reduced graphene oxide was synthesized by a green chemical method. Then, the structure and properties of the synthesized reduced graphene oxide was evaluated by performing FTIR and FESEM analyzes. Next, the synthesized reduced graphene oxide was coated on the polyvinylidene fluoride membrane by vacuum filtration method. Then, structural and functional evaluation of the fabricated composite membrane was performed in vacuum membrane distillation process. The optimized composite membrane reached 99.99% of salt rejection and 11.8 LMH of flux.

کلیدواژه‌ها [English]

  • Membrane Distillation
  • Desalination
  • Reduced Graphene Oxide
  • Polyvinylidene Fluoride
  • Coating
[1] L. Yu, M. Kanezashi, H. Nagasawa, and T. Tsuru, “Phase inversion/sintering-induced porous ceramic microsheet membranes for high-quality separation of oily wastewater,” Journal of Membrane Science, vol. 595, 2020, pp. 117477.
[2] R. W. Baker, Membrane Technology and Applications. 2012.
[3] O. Gupta, S. Roy, and S. Mitra, “Nanocarbon-Immobilized Membranes for Separation of Tetrahydrofuran from Water via Membrane Distillation,” ACS Applied Nano Materials, vol. 3, no. 7, 2020, pp. 6344–6353, Jul.
[4]        M. Khayet and T. Matsuura, Membrane distillation: principles and applications. Elsevier, 2011.
[5]        K. Nath, Membrane separation processes. 2017. Accessed: Sep. 30, 2020.
[6] M. Mulder, “Basic principles of membrane technology,” 1991.
[7]        W. Intrchom, S. Roy, M. S. Humoud, and S. Mitra, “Immobilization of graphene oxide on the permeate side of a membrane distillation membrane to enhance flux,” Membranes, vol. 8, no. 3, 2018.
[8]        S. Hun, “Thermal Reduction of Graphene Oxide,” in Physics and Applications of Graphene - Experiments, 2011.
[9]        S. v. Nipane, P. v. Korake, and G. S. Gokavi, “Graphene-zinc oxide nanorod nanocomposite as photocatalyst for enhanced degradation of dyes under UV light irradiation,” Ceramics International, vol. 41, no. 3, 2015, pp. 4549–4557.
[10] J. Zhao, L. Liu, and F. Li, Graphene oxide: physics and applications. 2015. Accessed: Oct. 09, 2020.
[11] M. S. Salem, A. H. El-Shazly, N. Nady, M. R. Elmarghany, and M. N. Sabry, “PES/PVDF blend membrane and its composite with graphene nanoplates: Preparation, characterization, and water desalination via membrane distillation,” Desalin. Water Treat, vol. 166, 2019, pp. 9–23.
[12] M. Wen et al., “Enhancing the selectivity of hydrogen isotopic water in membrane distillation by using graphene oxide,” Elsevier.
[13] T. Chen, A. Soroush, and M. S. Rahaman, “Highly Hydrophobic Electrospun Reduced Graphene Oxide/Poly (vinylidene fluoride-co-hexafluoropropylene) Membranes for Use in Membrane Distillation,” Industrial and Engineering Chemistry Research, vol. 57, no. 43, 2018, pp. 14535–14543, Oct.
[14] B. Bai, X. Yang, R. Tian, X. X. Wang, and H. Wang, “A high efficiency solar steam generation system with using residual heat to enhance steam escape,” Desalination, vol. 491, 2020.
[15] H. Li, W. Shi, X. Zeng, S. Huang, H. Zhang, and X. Qin, “Improved desalination properties of hydrophobic GO-incorporated PVDF electrospun nanofibrous composites for vacuum membrane distillation,” Separation and Purification Technology, vol. 230, 2020.
[16] R. Bhargava and S. Khan, “Effect of reduced graphene oxide (rGO) on structural, optical, and dielectric properties of Mg (OH) 2/rGO nanocomposites,” Advanced Powder Technology, vol. 28, no. 11, 2017, pp. 2812–2819.
[17] L. Dashairya, M. Rout, and P. Saha, “Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation,” Advanced Composites and Hybrid Materials, vol. 1, no. 1, 2018, pp. 135–148.