Imperial College London
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Emeritus ProfessorNigelGraham

Faculty of Engineering, Department of Civil and Environmental Engineering

Senior Research Investigator
 
 
 
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Contact

 

n.graham Website

 
 
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Assistant

 

Miss Judith Barritt +44 (0)20 7594 5967

 
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Location

 

406Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Xu:2024:10.1016/j.watres.2023.120839,
author = {Xu, L and Song, S and Graham, NJD and Yu, W},
doi = {10.1016/j.watres.2023.120839},
journal = {Water Research},
title = {Direct generation of DBPs from city dust during chlorine-based disinfection},
url = {http://dx.doi.org/10.1016/j.watres.2023.120839},
volume = {248},
year = {2024}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Chlorine-based disinfectants, such as sodium hypochlorite, are extensively used in our daily lives. In particular, during the recent Covid-19 pandemic and post-pandemic period, excessive amounts of chlorine-based disinfectants were used both indoors and outdoors to interrupt virus transmission. However, the interaction between disinfectants and city dust during the disinfection process has not been sufficiently evaluated. In this study, we conducted a comprehensive investigation into the intrinsic characteristics (e.g. morphology, size, elemental composition, and organic content, etc.) of dust collected from various indoor and outdoor areas. The results showed that the organic carbon content of indoor dust reached 6.14 %, with a corresponding measured dissolved organic carbon value of 4.17 ± 0.23 mg/g (normalized to the dust weight). Concentrations of regulated DBPs, resulting from the interaction between dust and NaClO, ranged from 57.78 ± 2.72 to 102.80 ± 22.63 µg/g for THMs and from 119.18 ± 6.50 to 285.14 ± 36.95 µg/g for HAAs (normalized to the dust weight). More significantly, using non-target analysis through gas chromatography quadrupole time-of-flight mass spectrometry (GC-qTOF-MS), we identified a total of 68, 89, and 87 types of halogenated DBPs from three typical indoor and outdoor sites (R-QH, C-JS, and W-BR, respectively). These unknown DBPs included compounds with higher toxicity compared to regulated DBPs. These findings highlight that city dust is a significant source of DBP generation during chlorine-based disinfection, posing potential harm to both the ecological environment and human health.
AU  - Xu,L
AU  - Song,S
AU  - Graham,NJD
AU  - Yu,W
DO  - 10.1016/j.watres.2023.120839
PY  - 2024///
SN  - 0043-1354
TI  - Direct generation of DBPs from city dust during chlorine-based disinfection
T2  - Water Research
UR  - http://dx.doi.org/10.1016/j.watres.2023.120839
UR  - http://hdl.handle.net/10044/1/108300
VL  - 248
ER  -
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