Characterization of Disinfection By-Products from Chromatographically Isolated NOM through High-Resolution Mass Spectrometry

被引：25

作者：

Harris, Bradley D. ^{[1
]}

Brown, Taylor A. ^{[1
]}

McGehee, Jimmie L. ^{[1
]}

Houserova, Dominika ^{[1
]}

Jackson, Benjamin A. ^{[1
]}

Buchel, Brandon C. ^{[1
]}

Krajewski, Logan C. ^{[3
]}

Whelton, Andrew J. ^{[2
]}

Stenson, Alexandra C. ^{[1
]}

机构：

[1] Univ S Alabama, Dept Chem, Mobile, AL 36688 USA

[2] Univ S Alabama, Dept Civil Engn, Mobile, AL 36688 USA

[3] Florida State Univ, Dept Chem & Biochem, Tallahassee, FL 32306 USA

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2015年 / 49卷 / 24期

关键词：

DISSOLVED ORGANIC-MATTER; WATER-TREATMENT-PLANT; HUMIC SUBSTANCES; SPECTRAL CHARACTERIZATION; LIQUID-CHROMATOGRAPHY; BLADDER-CANCER; NATURAL-WATERS; FULVIC-ACIDS; CHLORINATION; RISK;

D O I：

10.1021/acs.est.5b03466

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

As levels of natural organic matter (NOM) in surface water rise, the minimization of potentially harmful disinfection by-products (DBPs) becomes increasingly critical. Here, we introduce the advantage that chromatographic prefractionation brings to investigating compositional changes to NOM caused by chlorination. Fractionation reduces complexity, making it easier to observe changes and attribute them to specific components. Under the conditions tested (0.1-0.4 g of Cl to g of C without further additives), the differences between highly and less oxidized NOM were striking. Highly oxidized NOM formed more diverse Cl-containing DPB, had a higher propensity to react with multiple Cl, and tended to transform so drastically as to no longer be amenable to electrospray-ionization mass spectral detection. Less-oxidized material tended to incorporate one Cl and retain its humiclike composition. N-containing, lipidlike, and condensed aromatic structure (CAS)-like NOM were selectively enriched in mass spectra, suggesting that such components do not react as extensively with NaOCl as their counterparts. Carbohydrate-like NOM, conversely, was selectively removed from spectra by chlorination.

引用

页码：14239 / 14248

页数：10

共 40 条

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