Please use this identifier to cite or link to this item:
Title: Pyrite assisted peroxymonosulfate sludge conditioning: uncover triclosan transformation during treatment
Authors: Liang, Jialin
Zhang, Liang
Zhou, Yan
Keywords: Engineering::Environmental engineering
Issue Date: 2021
Source: Liang, J., Zhang, L. & Zhou, Y. (2021). Pyrite assisted peroxymonosulfate sludge conditioning: uncover triclosan transformation during treatment. Journal of Hazardous Materials, 413, 125368-.
Journal: Journal of Hazardous Materials 
Abstract: Waste activated sludge (WAS) dewatering is a crucial process for sludge treatment and disposal. In this study, we proposed a novel pyrite (FeS2) and peroxymonosulfate (PMS) treatment to improve WAS dewaterability. Micropollutants are commonly enriched in the sludge. It is not clear if the micropollutants remain in the sludge during the conditioning. Triclosan (TCS) as a widely used bactericide often presents in the WAS, thus was chosen as a target micropollutant. Pyrite + PMS treatment could simultaneously enhance WAS dewaterability and TCS removal with low cost and high benefit. Under the optimal conditions, the specific resistance of filtration (SRF) and capillary suction time (CST) were reduced by 84.60% and 74.91%, respectively. Meanwhile, the TCS removal efficiency was 34.08% with four transformation products identified. During the pyrite + PMS process, sulfate radicals and hydroxyl radicals were generated and strong flocculation was induced by iron. These two processes significantly reduced the sticky biopolymers, hydrophilic functional groups, and hydrophilic protein molecular structure of extracellular polymeric substances (EPS), leading to the release of bound water and TCS. Collectively, the pyrite + PMS treatment is a promising alternative for simultaneous enhancement of WAS dewatering and micropollutants removal, which is beneficial to the downstream treatment.
ISSN: 0304-3894
DOI: 10.1016/j.jhazmat.2021.125368
Schools: School of Civil and Environmental Engineering 
Research Centres: Advanced Environmental Biotechnology Centre (AEBC) 
Nanyang Environment and Water Research Institute 
Rights: © 2021 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:CEE Journal Articles
NEWRI Journal Articles

Citations 20

Updated on Sep 19, 2023

Web of ScienceTM
Citations 20

Updated on Sep 17, 2023

Page view(s)

Updated on Sep 23, 2023

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.