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Antimicrobial and antifouling properties of versatile PPSU/carboxylated GO nanocomposite membrane against Gram-positive and Gram-negative bacteria and protein.
- Source :
-
Environmental science and pollution research international [Environ Sci Pollut Res Int] 2018 Dec; Vol. 25 (34), pp. 34103-34113. Date of Electronic Publication: 2018 Oct 03. - Publication Year :
- 2018
-
Abstract
- Biofouling is a serious issue in membrane-based water and wastewater treatment as it critically compromises the efficacy of the water treatment processes. This investigation demonstrates the antimicrobial and antifouling properties of a nanocomposite membrane system composed of carboxyl-functionalized graphene oxide (COOH-GO) and polyphenylsulfone (PPSU). The PPSU/COOH-GO nanocomposite membrane exhibited excellent antimicrobial properties, achieving maximum bacteriostasis rates of 74.2% and 81.1% against the representative Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa, respectively) and 41.9% against the representative Gram-positive bacterium (Staphylococcus aureus). The PPSU/COOH-GO nanocomposite membrane inhibited the attachment, colonization, and the biofilm formation of three species. Antifouling was assessed through filtration experiments using a model foulant bovine serum albumin (BSA). The fouling mechanisms were investigated by Hermia's models (complete blocking, intermediate blocking, standard blocking, and cake formation), and the analysis involved fitting the volumetric flux decline experimental data to models. The fouling study revealed a less irreversible fouling and increased flux recovery ratio for the PPSU/COOH-GO nanocomposite membrane. Complete blocking of pores and cake formation were the major fouling mechanisms for the membrane.
- Subjects :
- Escherichia coli drug effects
Filtration instrumentation
Filtration methods
Graphite chemistry
Membranes, Artificial
Pseudomonas aeruginosa drug effects
Serum Albumin, Bovine chemistry
Staphylococcus aureus drug effects
Wastewater chemistry
Water Purification instrumentation
Water Purification methods
Anti-Bacterial Agents chemistry
Anti-Bacterial Agents pharmacology
Biofouling prevention & control
Nanocomposites chemistry
Polymers chemistry
Sulfones chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1614-7499
- Volume :
- 25
- Issue :
- 34
- Database :
- MEDLINE
- Journal :
- Environmental science and pollution research international
- Publication Type :
- Academic Journal
- Accession number :
- 30284164
- Full Text :
- https://doi.org/10.1007/s11356-018-3212-7