Characterization of Humic Acid in the Chemical Oxidation Technology(I) - Characteristics by Photocatalytic Oxidation Process -
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2000, v.13 no.2, pp.234-240
Kim, Jong Boo
Rhee, Dong Seok
Kim,
J. B., &
Rhee,
D.
S.
(2000). Characterization of Humic Acid in the Chemical Oxidation Technology(I) - Characteristics by Photocatalytic Oxidation Process -. , 13(2), 234-240.
Abstract
The efficiency of Photocatalytic Oxidation Process were investigated for the treatment of Aquatic Humic Substances (AHS). In UV-only system, pH 7-9 was the optimum pH range for TOC removal, and alkali range was the optimum pH for absorbance decrease. In UV/$TiO_2$ system, the optimum $TiO_2$ dosage was 50ppm and over 50ppm of $TiO_2$ dosage was not effective for removal of AHS. In UV/$H_2O_2$ system, optimum $H_2O_2$ dosage was 20mM, when over 20mM dosage, removal of TOC (Total Organic Carbon) and absorbance was decreased. Radical scavenger affected on the photo-oxidation of AHS. Removal rate of TOC and absorbance was decreased by addition of carbonate ions and TOC removal was more effected than that of absorbance.
- keywords
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photocatalytic oxidation process,
aquatic humic substances (AHS),
total organic carbon,
absorbance,
radical scavenger