Imperial College London
Portrait Picture

Emeritus ProfessorNigelGraham

Faculty of Engineering, Department of Civil and Environmental Engineering

Senior Research Investigator
 
 
 
//

Contact

 

n.graham Website

 
 
//

Assistant

 

Miss Judith Barritt +44 (0)20 7594 5967

 
//

Location

 

406Skempton BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Ritson:2019:10.1039/c9ew00303g,
author = {Ritson, JP and Graham, NJD},
doi = {10.1039/c9ew00303g},
journal = {Environmental Science: Water Research & Technology},
pages = {1593--1598},
title = {Water extractable organic matter (WEOM) as an indicator of granular activated carbon (GAC) bed life and water quality outcomes in drinking water treatment},
url = {http://dx.doi.org/10.1039/c9ew00303g},
volume = {5},
year = {2019}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Granular activated carbon (GAC) is often used in drinking water treatment to remove dissolved organic carbon (DOC), taste and odour compounds, and organic micro-pollutants. As these chemicals are adsorbed onto the GAC surface, the area available for further adsorption decreases, meaning that the removal of target compounds decreases over time. Ascertaining the correct point to regenerate the GAC is a critical parameter in terms of both water quality performance and operational expenditure for the water company. Using a test case of a UK water treatment works with five GAC beds of varying age we show that current practices of using time-in-use are ineffective for optimal removal of DOC and disinfection by-product precursors. Our data show that assessment of the water extractable organic matter (WEOM) adsorbed onto the GAC can give an accurate indicator of both DOC removal (adjusted R2 = 0.985, p = 0.001, n = 5) and reduction in trihalomethane formation (adjusted R2 = 0.970, p = 0.001, n = 5). These results suggest that simple methods using equipment commonly available at treatment works could be adopted for rapid assessment of remaining GAC bed life.
AU  - Ritson,JP
AU  - Graham,NJD
DO  - 10.1039/c9ew00303g
EP  - 1598
PY  - 2019///
SN  - 2053-1400
SP  - 1593
TI  - Water extractable organic matter (WEOM) as an indicator of granular activated carbon (GAC) bed life and water quality outcomes in drinking water treatment
T2  - Environmental Science: Water Research & Technology
UR  - http://dx.doi.org/10.1039/c9ew00303g
UR  - http://hdl.handle.net/10044/1/73312
VL  - 5
ER  -
Download