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  • Molecular weight distribution of organic matter by ozonation and biofiltration.

Molecular weight distribution of organic matter by ozonation and biofiltration.

Water science and technology : a journal of the International Association on Water Pollution Research (2012-10-31)
Yen-Hui Lin
ABSTRACT

Molecular weight (MW) distribution of organic matter by ozonation and biofiltration was evaluated using gel chromatography. The MW distribution of organic matter by Sephadex G-25 was observed from groups 2 (MW = 1,029-7,031 g/mol) and 3 (MW = 303-1,029 g/mol) shifted to groups 2, 3 and 4 (MW < 303 g/mol) under ozone doses of 0.1 and 0.4 mg O₃/mg total organic carbon (TOC). The shift in MW increases as ozone dosage increases. Biofiltration effectively degraded the organic molecule of group 2; however, the biofiltration only slightly degraded the organic molecule of group 4. Increased ozone dose destroyed functional groups C═C in phenolic and C-O in alcoholic compounds and increased UV-insensitive biodegradable organic carbon for subsequent biofiltration. Biofiltration effectively degraded organic compounds of alcohols and alkenes at an ozone dose of 0.1 mg O₃/mg TOC. Experimental approaches in this study can be applied to evaluate and diagnose the function of a full-scale process combining ozonation and biofiltration in drinking water treatment plants.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Sephadex® G-25, BioReagent, for molecular biology, DNA grade, Superfine
Sigma-Aldrich
Sephadex® G-25, Medium
Sigma-Aldrich
Sephadex® G-75, Medium
Sigma-Aldrich
Sephadex® G-25, Coarse
Sigma-Aldrich
Sephadex® G-25, Fine
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Sephadex® G-15, Medium
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Sephadex® G-100, Superfine
Sigma-Aldrich
Sephadex® G-75, Superfine
Sigma-Aldrich
Sephadex® G-100, Medium
Sigma-Aldrich
Sephadex® G-100, BioReagent, for molecular biology, DNA grade, medium
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Sephadex® G-10, Medium
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Sephadex® G-50, Superfine
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Sephadex® G-50, Fine
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Sephadex® G-50, BioReagent, for molecular biology, DNA grade, medium
Supelco
Sephadex® G-50, Medium
Sigma-Aldrich
Sephadex® G-50, BioReagent, for molecular biology, DNA grade, fine