The design of the project was developed
in close conjunction with United Utilities, actual site water was used spiked with a pesticide Diuron to allow for inclusion
of background Natural Organic Matter (NOM). The GACs were selected to ensure that samples from within a typical regeneration
time-line were used and this provided GACs with different service life history.
The data obtained could be calculated
into adsorption capacity for Diuron. As service life increases, adsorption capacity for Diuron decreases, however some capacity
for Diuron remains even after 2 years in service.
The use of RSSCTs together with the analysis of the physical and chemical
characteristics of the GAC can assist with service life evaluation. This strategy can provide water utilities with a greater
understanding of this critical asset and thus the capability to make more informed operational decisions regarding regeneration