Modifying thin-film composite forward osmosis membranes using various SiO2 nanoparticles for aquaculture wastewater recovery
Journal
Chemosphere
Journal Volume
281
Date Issued
2021
Author(s)
Abstract
This paper describes the fabrication, modification, and evaluation of the performance of thin-film composite (TFC) forward osmosis (FO) membranes for lab-scale aquaculture wastewater recovery using various fumed silica (SiO2) nanoparticles. The active polyamide (PA) layers of these membranes were novelly modified using different types of pretreated SiO2 nanoparticles [virgin SiO2, dried SiO2, and 3-aminopropyltriethoxysilane (APTES)-modified SiO2] and concentrations (0.05, 0,1, 0,2, and 0.4 wt%) to improve the membrane hydrophilicity with minimum particle agglomeration. Results show that the APTES-SiO2 modified membrane had the highest water flux and selectivity, followed by the dried-SiO2 modified membrane. The APTES coupling agent notably reduced the SiO2 aggregation on the membrane surface and improved membrane hydrophilicity. Consequently, high permeate flux and an acceptable reverse solute flux were observed. The optimal SiO2 concentration for PA modification was 0.1 wt% for all the nanoparticle types. The virgin and APTES-SiO2 modified membranes were used for aquaculture wastewater recovery. The water recovery rate reached 47% in 84 h when using the APTES-SiO2 modified membrane, while it reached only 26% in 108 h when using the virgin membrane. With a suitable design of the filtration apparatus and choice of draw solution (DS), the prepared novel TFC-FO membrane containing APTES-modified SiO2 can be used for recycling aquaculture wastewater into the DS, which can then be reused for other purposes. ? 2021 Elsevier Ltd
Subjects
Forward osmosis (FO)
Polyamide (PA) modification
Silica nanoparticles
Thin-film composite (TFC) membrane
Water recovery
Aquaculture
Composite membranes
Coupling agents
Hydrophilicity
Nanocomposite films
Osmosis membranes
Reverse osmosis
Wastewater reclamation
Water filtration
3 aminopropyltriethoxysilane
Aquaculture wastewater
Forward osmose
Modified membranes
Polyamide modification
SiO$-2$
Thin film composite membranes
Thin film composites
Thin films
polyamide
silica nanoparticle
nanoparticle
silicon dioxide
aquaculture system
film
membrane
osmosis
recovery
wastewater treatment
aquaculture
Article
concentration (parameter)
controlled study
hydrophilicity
membrane permeability
solute
thin film (procedure)
waste water management
waste water recycling
water filtration
water supply
water transport
artificial membrane
wastewater
water management
Membranes, Artificial
Nanoparticles
Osmosis
Silicon Dioxide
Waste Water
Water Purification
SDGs
Type
journal article