{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Janwery D"],"funding":["National Center of Excellence in Analytical Chemistry, University of Sindh Jamshoro","National Research Foundation of Korea"],"pagination":["7648-7656"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9979334"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["8(8)"],"pubmed_abstract":["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<sup>6+</sup> (∼87.5%), As<sup>3+</sup> (∼89.5%), Cd<sup>2+</sup> (∼93.0%), and Pb<sup>2+</sup> (∼99.5%) and a good water permeance of ∼460 ± 20 L m<sup>-2</sup> h<sup>-1</sup> bar<sup>-1</sup>. 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<sup>6+</sup>, As<sup>3+</sup>, Cd<sup>2+</sup>, and Pb<sup>2+</sup>, respectively, with a DI water permeance of ∼150 ± 10 L m<sup>-2</sup> h<sup>-1</sup> bar<sup>-1</sup>. Further, both membranes are used for water desalination by measuring rejection of small ions such as NaCl, Na<sub>2</sub>SO<sub>4</sub>, MgCl<sub>2</sub>, and MgSO<sub>4</sub>. 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."],"journal":["ACS omega"],"pubmed_title":["Lamellar Graphene Oxide-Based Composite Membranes for Efficient Separation of Heavy Metal Ions and Desalination of Water."],"pmcid":["PMC9979334"],"funding_grant_id":["NRF-2022R1A2C2004771"],"pubmed_authors":["Memon FH","Memon AA","Ali W","Thebo KH","Memon FN","Choi KH","Janwery D","Iqbal M"],"additional_accession":[]},"is_claimable":false,"name":"Lamellar Graphene Oxide-Based Composite Membranes for Efficient Separation of Heavy Metal Ions and Desalination of Water.","description":"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<sup>6+</sup> (∼87.5%), As<sup>3+</sup> (∼89.5%), Cd<sup>2+</sup> (∼93.0%), and Pb<sup>2+</sup> (∼99.5%) and a good water permeance of ∼460 ± 20 L m<sup>-2</sup> h<sup>-1</sup> bar<sup>-1</sup>. 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<sup>6+</sup>, As<sup>3+</sup>, Cd<sup>2+</sup>, and Pb<sup>2+</sup>, respectively, with a DI water permeance of ∼150 ± 10 L m<sup>-2</sup> h<sup>-1</sup> bar<sup>-1</sup>. Further, both membranes are used for water desalination by measuring rejection of small ions such as NaCl, Na<sub>2</sub>SO<sub>4</sub>, MgCl<sub>2</sub>, and MgSO<sub>4</sub>. 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.","dates":{"release":"2023-01-01T00:00:00Z","publication":"2023 Feb","modification":"2026-06-06T22:11:58.175Z","creation":"2026-06-06T03:07:06.497Z"},"accession":"S-EPMC9979334","cross_references":{"pubmed":["36872981"],"doi":["10.1021/acsomega.2c07243"]}}