Lamellar Graphene Oxide-Based Composite Membranes for Efficient Separation of Heavy Metal Ions and Desalination of Water.

Autor: Janwery D; National Centre of Excellence in Analytical Chemistry (NCEAC), University of Sindh, Jamshoro 76060, Pakistan., Memon FH; Department of Mechatronics Engineering, Jeju National University, Jeju 63243, Republic of Korea.; Department of Electrical Engineering, Sukkur IBA University, Sukkur 65200, Sindh, Pakistan., Memon AA; National Centre of Excellence in Analytical Chemistry (NCEAC), University of Sindh, Jamshoro 76060, Pakistan., Iqbal M; Department of Chemistry, Faculty of Physical and Applied Sciences, The University of Haripur KPK, Haripur 22620, Pakistan., Memon FN; Department of Chemistry, University of Karachi, Karachi 75270, Sindh, Pakistan., Ali W; Department of Mechatronics Engineering, Jeju National University, Jeju 63243, Republic of Korea., Choi KH; Department of Mechatronics Engineering, Jeju National University, Jeju 63243, Republic of Korea., Thebo KH; Institute of Metal Research, Chinese Academy of Sciences (UCAS), Shenyang 110016, China.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2023 Feb 13; Vol. 8 (8), pp. 7648-7656. Date of Electronic Publication: 2023 Feb 13 (Print Publication: 2023).
DOI: 10.1021/acsomega.2c07243
Abstrakt: Sufficient efforts have been carried out to fabricate highly efficient graphene oxide (GO) lamellar membranes for heavy metal ion separation and desalination of water. However, selectivity for small ions remains a major problem. Herein, GO was modified by using onion extractive (OE) and a bioactive phenolic compound, i.e., quercetin. The as-prepared modified materials were fabricated into membranes and used for separation of heavy metal ions and water desalination. The GO/onion extract (GO/OE) composite membrane with a thickness of 350 nm shows an excellent rejection efficiency for several heavy metal ions such as Cr 6+ (∼87.5%), As 3+ (∼89.5%), Cd 2+ (∼93.0%), and Pb 2+ (∼99.5%) and a good water permeance of ∼460 ± 20 L m -2 h -1 bar -1 . In addition, a GO/quercetin (GO/Q) composite membrane is also fabricated from quercetin for comparative studies. Quercetin is an active ingredient of onion extractives (2.1% w/w). The GO/Q composite membranes show good rejection up to ∼78.0, ∼80.5, ∼88.0, and 95.2% for Cr 6+ , As 3+ , Cd 2+ , and Pb 2+ , respectively, with a DI water permeance of ∼150 ± 10 L m -2 h -1 bar -1 . Further, both membranes are used for water desalination by measuring rejection of small ions such as NaCl, Na 2 SO 4 , MgCl 2 , and MgSO 4 . The resulting membranes show >70% rejection for small ions. In addition, both membranes are used for filtration of Indus River water and the GO/Q membrane shows remarkably high separation efficiency and makes river water suitable for drinking purpose. Furthermore, the GO/QE composite membrane is highly stable up to ∼25 days under acidic, basic, and neutral environments as compared to GO/Q composite and pristine GO-based membranes.
Competing Interests: The authors declare no competing financial interest.
(© 2023 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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