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Surface modification of thin-film-composite membranes with antibiotics for fouling reduction

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posted on 28.03.2022, 10:55 authored by Maryam Golestani
Thin-film-composite (TFC) membranes are used in reverse osmosis (RO) and nanofiltration (NF) for producing fresh water. However, they are prone to fouling by biological and chemical contaminants, which significantly diminishes their efficiency. Therefore, feed pretreatments and membrane cleaning are required to maintain their proper functionality, which increase operational cost. Alternatively, the surface properties of TFC membranes can be modified to reduce fouling and increase membrane efficiency and lifetime. This project aimed to modify a commercial TFC membrane’s surface with polydopamine (PDA) mixed with an antibiotic tobramycin (TOB). Polymerization reactivity of dopamine was identified by UV-vis spectroscopy. The modified-TFC membranes were characterized by scanning electron microscopy, atomic force microscopy, and water contact angle analysis. The separation performance, antifouling and antibacterial properties of the membranes were also examined. The modified membranes showed antibacterial properties against E.coli and less flux reduction during filtration with bovine serum albumin (BSA) solution. The permeability and selectivity of the membrane after surface modification changed little. These results demonstrate that TOB can be directly deposited on TFC membranes using PDA as a matrix. Surface modification with TOB and PDA is an effective strategy to improve the organic fouling and biofouling resistance of TFC membranes.

History

Table of Contents

1. Introduction -- 2. Literature review -- 3. Experimental -- 4. Results and discussion -- 5. Conclusion -- References.

Notes

Empirical thesis. Bibliography: pages 43-49

Awarding Institution

Macquarie University

Degree Type

Thesis MRes

Degree

MRes, Macquarie University, Faculty of Human Sciences, Department of Linguistics

Department, Centre or School

Department of Linguistics

Year of Award

2018

Principal Supervisor

Shuaifei Zhao

Rights

Copyright Maryam Golestani 2018. Copyright disclaimer: http://mq.edu.au/library/copyright

Language

English

Extent

1 online resource (vii, 49 pages) illustrations (some colour)

Former Identifiers

mq:70953 http://hdl.handle.net/1959.14/1269340