Abstract

Microplastics (MPs) are emerging contaminants that are abundantly present in the influent and effluent of wastewater treatment plants (WWTPs). Forward osmosis (FO) is an advanced treatment technology with potential applications in WWTPs. The presence of MPs in WWTP effluents can contribute to FO fouling and performance deterioration. This study focuses on FO membrane fouling by MPs of different sizes, and the interactional impacts of MPs and Humic acid (HA) (as the most common organic foulant in WWTPs) on FO membrane performance. The synergistic effect of combined MPs and HA fouling is shown to cause higher flux decline for FO membranes than that of HA or MPs alone. Reverse salt flux increased in the presence of MPs, and decreased when HA was present. Further, full flux recovery was obtained for all fouled membranes after hydraulic cleaning. This indicates the efficiency of FO systems for treating wastewater with high fouling potential. This study highlights the necessity of considering MPs in studying fouling behaviour, and for mitigation strategies of membranes used in WWT. The fundamentals created here can be further extended to other membrane-assisted separation processes.

Keywords

Forward osmosis membranes, Irreversible fouling, Microplastics, Organic foulants, Reverse salt flux

Document Type

Journal Article

Date of Publication

1-1-2023

Volume

311

PubMed ID

36270521

Publication Title

Chemosphere

Publisher

Elsevier

School

School of Engineering / Mineral Recovery Research Center (MRRC)

RAS ID

56560

Funders

Australian Research Council / Edith Cowan University

Grant Number

ARC Number : G1005399

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Comments

This is an Authors Accepted Manuscript version of an article published by Elsevier in Chemosphere. The published version is available at: https://doi.org/10.1016/j.chemosphere.2022.136906

Golgoli, M., Khiadani, M., Sen, T. K., Razmjou, A., Johns, M. L., & Zarger, M. (2023). Synergistic effects of microplastics and organic foulants on the performance of forward osmosis membranes. Chemosphere, 311(1), article 136906. https://doi.org/10.1016/j.chemosphere.2022.136906

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Link to publisher version (DOI)

10.1016/j.chemosphere.2022.136906