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Impact of UV-H2O2 Advanced Oxidation and Aging Processes on GAC Capacity for the Removal of Cyanobacterial Taste and Odor Compounds.

Zamyadi A, Sawade E, Ho L, Newcombe G, Hofmann R - Environ Health Insights (2015)

Bottom Line: Geosmin and 2-methylisoborneol (MIB) are the most commonly detected T&O compounds associated with cyanobacterial presence in drinking water sources.However, residual H2O2 (>80% of the initial dose) has to be removed from water prior final disinfection.Recently, granular activated carbon (GAC) is used to remove H2O2 residual.

View Article: PubMed Central - PubMed

Affiliation: UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales (UNSW), Sydney, New South Wales, Australia. ; Department of Civil Engineering, University of Toronto, Toronto, Canada.

ABSTRACT
Cyanobacteria and their taste and odor (T&O) compounds are a growing concern in water sources globally. Geosmin and 2-methylisoborneol (MIB) are the most commonly detected T&O compounds associated with cyanobacterial presence in drinking water sources. The use of ultraviolet and hydrogen peroxide (H2O2) as an advanced oxidation treatment for T&O control is an emerging technology. However, residual H2O2 (>80% of the initial dose) has to be removed from water prior final disinfection. Recently, granular activated carbon (GAC) is used to remove H2O2 residual. The objective of this study is to assess the impact of H2O2 quenching and aging processes on GAC capacity for the removal of geosmin and MIB. Pilot columns with different types of GAC and presence/absence of H2O2 have been used for this study. H2O2 removal for the operational period of 6 months has no significant impact on GAC capacity to remove the geosmin and MIB from water.

No MeSH data available.


Related in: MedlinePlus

MIB removal by two types of GAC during the Australian experiment.Note: *BDL, below detection limit.
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f8-ehi-suppl.3-2015-001: MIB removal by two types of GAC during the Australian experiment.Note: *BDL, below detection limit.

Mentions: To compare the geosmin and MIB removal with GAC depth with and without advanced oxidation, the results from the Canadian study were compared to the laboratory-based column study conducted in Australia. H2O2 removal on GAC was not the focus of the study conducted in Australia. In all Australian assays, geosmin was removed to below detection limit (data not shown). Figure 8 demonstrates that for MIB removal, the F300 GAC was performed as well as the GA1000N over the trial period. An application of analysis of variance (P > 0.1) to the GAC data showed that there was no significant decrease in the removal by the GAC over the trial period. As for the percent removals for the two inlet concentrations (low and high), similar results were obtained for GAC aged for 3 and 6 months.


Impact of UV-H2O2 Advanced Oxidation and Aging Processes on GAC Capacity for the Removal of Cyanobacterial Taste and Odor Compounds.

Zamyadi A, Sawade E, Ho L, Newcombe G, Hofmann R - Environ Health Insights (2015)

MIB removal by two types of GAC during the Australian experiment.Note: *BDL, below detection limit.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4592064&req=5

f8-ehi-suppl.3-2015-001: MIB removal by two types of GAC during the Australian experiment.Note: *BDL, below detection limit.
Mentions: To compare the geosmin and MIB removal with GAC depth with and without advanced oxidation, the results from the Canadian study were compared to the laboratory-based column study conducted in Australia. H2O2 removal on GAC was not the focus of the study conducted in Australia. In all Australian assays, geosmin was removed to below detection limit (data not shown). Figure 8 demonstrates that for MIB removal, the F300 GAC was performed as well as the GA1000N over the trial period. An application of analysis of variance (P > 0.1) to the GAC data showed that there was no significant decrease in the removal by the GAC over the trial period. As for the percent removals for the two inlet concentrations (low and high), similar results were obtained for GAC aged for 3 and 6 months.

Bottom Line: Geosmin and 2-methylisoborneol (MIB) are the most commonly detected T&O compounds associated with cyanobacterial presence in drinking water sources.However, residual H2O2 (>80% of the initial dose) has to be removed from water prior final disinfection.Recently, granular activated carbon (GAC) is used to remove H2O2 residual.

View Article: PubMed Central - PubMed

Affiliation: UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales (UNSW), Sydney, New South Wales, Australia. ; Department of Civil Engineering, University of Toronto, Toronto, Canada.

ABSTRACT
Cyanobacteria and their taste and odor (T&O) compounds are a growing concern in water sources globally. Geosmin and 2-methylisoborneol (MIB) are the most commonly detected T&O compounds associated with cyanobacterial presence in drinking water sources. The use of ultraviolet and hydrogen peroxide (H2O2) as an advanced oxidation treatment for T&O control is an emerging technology. However, residual H2O2 (>80% of the initial dose) has to be removed from water prior final disinfection. Recently, granular activated carbon (GAC) is used to remove H2O2 residual. The objective of this study is to assess the impact of H2O2 quenching and aging processes on GAC capacity for the removal of geosmin and MIB. Pilot columns with different types of GAC and presence/absence of H2O2 have been used for this study. H2O2 removal for the operational period of 6 months has no significant impact on GAC capacity to remove the geosmin and MIB from water.

No MeSH data available.


Related in: MedlinePlus