Abstract
In this study, silver nanoparticles (AgNPs) were synthesized from tea leaves extract and its antimicrobial properties was tested on Escherichia coli (E. coli) using agar well method. The synthesized nanoparticles were characterized by using UV-vis spectroscopy, transmission electron microscopy (TEM) and X-ray diffraction (XRD). The result from XRD analysis shows that the synthesized AgNPs are a face-centered cubic (fcc) structure with an average particle size of 28±15 nm AgNPs which confirmed by TEM. The synthesized AgNPs were then used in the preparation of thin film composite NF membrane via interfacial polymerization method. Separation performance of the produced membrane was evaluated in term of membrane permeability and solute rejection (vitamin B12, NaCl and Na2SO4 solutions). Based on the structural parameters (pore size, rp and Δx/Ak) values obtained from vitamin B12 test, all membranes can be considered as tight NF membranes. From the salts rejection test, membranes with the addition of AgNPs exhibited higher salt rejection compared to the neat membranes.
Highlights
Nowadays, applications of membrane separation have many advantages but their disadvantages become a huge issue
We report on the preparation and characterization of low biofouling thin film composite polyamide NF membrane by interfacial polymerization method between organic Trimesoyl Chloride (TMC) and aqueous MPD solution consisting AgNPs synthesized by greener method
The antibacterial capability of produced PA/Ag NF membranes could be seen from the inhibition zone area.The results shown in Figure 5 are the antibacterial test on E. coli from this study and the antibacterial test results from Basri et al [2]
Summary
Applications of membrane separation have many advantages but their disadvantages become a huge issue. Despite the widely uses in separation processes, membrane process faces a common problem namely fouling. Few studies have reported that AgNPs were used to synthesize low biofouling UF membranes by phase inversion method [2,3,4,5]. Lee et al prepared polyamide NF membrane consisting commercial AgNPs by in situ interfacial polymerization method between aqueous MPhenylenediamine (MPD) and organic Trimesoyl Chloride (TMC)-Ag solutions and tested its antibiofouling effect on bacteria Pseudomonas [6]. We report on the preparation and characterization of low biofouling thin film composite polyamide NF membrane by interfacial polymerization method between organic TMC and aqueous MPD solution consisting AgNPs synthesized by greener method
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