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Bromate ion removal by HEEB irradiation
High‐energy electron‐beam irradiation removes bromate after its formation, when other control strategies are not as effective.
Proposed drinking water regulations will specify a maximum contaminant level of 0.01 mg/L for bromate ion (BrO3−). This study used high‐energy electron‐beam irradiation to remove BrO3− after formation, when other control strategies are not as effective. BrO3− was reduced to bromide ion (Br−), with bromine (HOBr/OBr−) as intermediate. A dose of 60 krads was sufficient to reduce 70 percent of BrO3− from an initial concentration of 100 μg/L. The presence of electron scavengers such as hydrogen peroxide and nitrate significantly reduced BrO3− removal, whereas the addition of the OH radical scavenger such as t‐butanol did not affect the removal of BrO3−. This indicates that aqueous electrons (eaq−) are mainly responsible for BrO3− destruction. The presence of natural organic matter decreased BrO3− reduction efficiency. The reaction of eaq− with various bromine species in water was used to model and simulate experimental data for the destruction of BrO3−. Computer model predictions were in fairly good agreement with the experimental results.
Bromate ion removal by HEEB irradiation
High‐energy electron‐beam irradiation removes bromate after its formation, when other control strategies are not as effective.
Proposed drinking water regulations will specify a maximum contaminant level of 0.01 mg/L for bromate ion (BrO3−). This study used high‐energy electron‐beam irradiation to remove BrO3− after formation, when other control strategies are not as effective. BrO3− was reduced to bromide ion (Br−), with bromine (HOBr/OBr−) as intermediate. A dose of 60 krads was sufficient to reduce 70 percent of BrO3− from an initial concentration of 100 μg/L. The presence of electron scavengers such as hydrogen peroxide and nitrate significantly reduced BrO3− removal, whereas the addition of the OH radical scavenger such as t‐butanol did not affect the removal of BrO3−. This indicates that aqueous electrons (eaq−) are mainly responsible for BrO3− destruction. The presence of natural organic matter decreased BrO3− reduction efficiency. The reaction of eaq− with various bromine species in water was used to model and simulate experimental data for the destruction of BrO3−. Computer model predictions were in fairly good agreement with the experimental results.
Bromate ion removal by HEEB irradiation
Siddiqui, Mohamed S. (author) / Amy, Gary L. (author) / Cooper, William J. (author) / Kurucz, Charles N. (author) / Waite, Thomas D. (author) / Nickelsen, Michael G. (author)
Journal ‐ American Water Works Association ; 88 ; 90-101
1996-10-01
12 pages
Article (Journal)
Electronic Resource
English
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