Rossman Paul D, Boccelli Dominic L, Pressman Jonathan G
Department of Biomedical, Chemical, and Environmental Engineering, University of Cincinnati, Ohio.
National Risk Management Research Laboratory, US Environmental Protection Agency, Cincinnati, Ohio.
J Am Water Works Assoc. 2017;109(1):E1-E9. doi: 10.5942/jawwa.2017.109.0008.
Natural organic matter (NOM) was collected, concentrated, and lyophilized on a monthly basis for 15 months to create a temporal NOM library and assess seasonal variability of untreated Ohio River water. Using fluorescence spectroscopy with parallel factor analysis, similar spectral components for both the ultrafiltered source water (UF1X) and reconstituted lyophilized NOM were observed in a two-component model throughout the study, with overall average emission and excitation wavelengths of 418 nm and 270 nm, respectively, for component 1 and 482 nm and 370 nm, respectively, for component 2. Fluorescence spectroscopy, high-pressure liquid chromatography-size exclusion chromatography, and elemental analysis indicated that the NOM was humic-like during the study with only small seasonal changes. Data from these analyses also demonstrated similarity between results for UF1X, reverse osmosis-concentrated NOM, and reconstituted- lyophilized NOM, validating the use of the reconstituted- lyophilized NOM as a surrogate for its source.
每月收集、浓缩并冻干天然有机物（NOM），持续15个月，以建立一个时间性NOM库，并评估未处理的俄亥俄河河水的季节性变化。在整个研究过程中，使用平行因子分析的荧光光谱法，在双组分模型中观察到超滤源水（UF1X）和重构冻干NOM具有相似的光谱成分，组分1的总体平均发射波长和激发波长分别为418 nm和270 nm，组分2的分别为482 nm和370 nm。荧光光谱法、高压液相色谱-尺寸排阻色谱法和元素分析表明，在研究期间NOM类似腐殖质，且季节性变化很小。这些分析的数据还表明UF1X、反渗透浓缩NOM和重构冻干NOM的结果之间具有相似性，验证了将重构冻干NOM用作其来源替代物的可行性。
