4.2 Article

Deconvolution of Size Exclusion Chromatograms: New Insights into the Molecular Weight Distribution of Dissolved Organic Matter in Ozone and Biological Activated Carbon

期刊

ACS ES&T WATER
卷 1, 期 1, 页码 125-133

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsestwater.0c00020

关键词

size exclusion chromatography; nonnegative matrix factorization (NMF); peak deconvolution; ozone; biological activated carbon (BAC); biodegradable dissolved organic carbon

资金

  1. Water Research Foundation [Reuse-14-01]

向作者/读者索取更多资源

Size exclusion chromatography (SEC) is a useful tool for understanding the distribution of dissolved organic matter (DOM), but the limitations of a single analytical column often oversimplify the interpretation. A chemometric method using nonnegative matrix factorization was applied to deconvolute SEC chromatograms, revealing insights into the distribution of organic matter and the effects of ozone treatment on biodegradability. The development of GUI software for SEC chromatogram deconvolution provides a novel approach for interpreting SEC chromatograms.
Size exclusion chromatography (SEC) is a useful tool for understanding the apparent molecular weight (AMW) distribution of dissolved organic matter (DOM). However, the limitation that a single analytical column generally cannot resolve the entire AMW range of DOM from hundreds of daltons to hundreds of kilodaltons often oversimplifies the interpretation of the AMW distribution. This study applied the nonnegative matrix factorization to deconvolute SEC chromatograms and cross-validated deconvoluted components. The algorithm was further applied to SEC chromatograms of samples collected from a pilot-scale ozonebiological activated carbon system. The trimodal AMW distribution of chromatograms was deconvoluted into six components: three from the biopolymer and the other three from humic and low-molecular weight (humic/LMW) substances. The deconvolution process captured the formation of a biopolymer fraction that was not noticeably observed without chemometric deconvolution. Also, the increased level of removal of the lowest-molecular weight fraction at the elevated ozone dose from 4.1 to 6.4 mg of O-3/L suggests that ozone enhanced biodegradability selectively for low-molecular weight fractions. The proposed chemometric method can be a useful tool for providing novel insights into SEC chromatogram interpretations. MATLAB-based GUI software for SEC chromatogram deconvolution was developed and is available online.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.2
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据