Next Article in Journal
Analysis of the Comprehensive Tensile Relationship in Electrospun Silk Fibroin/Polycaprolactone Nanofiber Membranes
Previous Article in Journal
Modification of the Selectivity Properties of Tubular Ceramic Membranes after Alkaline Treatment
Article Menu

Export Article

Open AccessArticle
Membranes 2017, 7(4), 66; https://doi.org/10.3390/membranes7040066

Photoactive Gel for Assisted Cleaning during Olive Mill Wastewater Membrane Microfiltration

1
Research Institute of Membrane Technology-National Research Council (ITM-CNR), 87036 Rende, CS, Italy
2
Department of Pharmacy, University of Calabria (UNICAL), 87036 Rende, CS, Italy
*
Author to whom correspondence should be addressed.
Received: 19 September 2017 / Revised: 14 November 2017 / Accepted: 22 November 2017 / Published: 25 November 2017
(This article belongs to the Section Membrane Preparation and Characterization)
View Full-Text   |   Download PDF [3792 KB, uploaded 28 November 2017]   |  

Abstract

A photoactive gel has been fabricated on the surface of polyethylene membranes for enhancing the fouling resistance during olive mill wastewater treatment. Light and pH responsive materials have been introduced in the membrane surface through the build up of a layer-by-layer pattern, which is formed by photocatalytic nanoparticles and ionic polyelectrolytes. The best working conditions to contrast foulants adsorption have been explored and identified. Repulsive interfacial forces and assisted transfer of foulants to catalytic sites have been envisaged as crucial factors for contrasting the decline of the flux during microfiltration. Tests in submerged configuration have been implemented for six continuous hours under irradiation at two different pH conditions. As a result, a worthy efficiency of the photoactive gel has been reached when suitable chemical microenvironments have been generated along the shell side of the membranes. No additional chemical reagents or expensive back-flushing procedures have been necessary to further clean the membranes; rather, fast and reversible pH switches have been enough to remove residues, thereby preserving the integrity of the layer-by-layer (LBL) complex onto the membrane surface. View Full-Text
Keywords: self-cleaning; titanium oxide nanoparticles; layer-by-layer; water treatment; submerged microfiltration self-cleaning; titanium oxide nanoparticles; layer-by-layer; water treatment; submerged microfiltration
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Han, Y.; Giorno, L.; Gugliuzza, A. Photoactive Gel for Assisted Cleaning during Olive Mill Wastewater Membrane Microfiltration. Membranes 2017, 7, 66.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Membranes EISSN 2077-0375 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top