2015 Fiscal Year Final Research Report
Removal of precursors of nitrogenous disinfection by-products in drinking water sources by advanced treatment processes
| Project/Area Number |
26820221
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Civil and environmental engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Research Collaborator |
TAKIZAWA Satoshi , 教授
PHETRAK Athit
OSAWA Hideki
AMANO Mitsuru
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | nitrogenous DBPs / anion exchange resin / brominated DBPs / dissolved organic amtter / ferrihydrite / microfiltration / membrane fouling / water treatment |
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| Outline of Final Research Achievements |
This research elucidated the precursors of N-DBPs in various drinking water sources of Japan and Thailand, and the effectiveness of different advanced water treatment processes to remove the DBP precursors. Polystyrene anion exchange resin had the greatest ability to remove bromide and subsequently decreased formation potentials of brominated THMs in comparison to polyacrylic resins. Ferrate (Fe(VI)) oxidation could oxidize aromatic DOM into smaller MW DOM that could be removed by subsequent coagulation using polyaluminium chloride. When the large MW (> 3000 Da) aromatic DOM is dominant in the water, ferrihydrite may be a suitable adsorbent to mitigate the DBP formation. When the source water contained high bromide concentration, adding anion exchange adsorption using polystyrene resin could offer simultaneous removal of both bromide and DOM.
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| Free Research Field |
drinking water treatment engineering
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