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Determination of phenolic concentrations in dissolved organic matter pre-concentrate using solid phase extraction from natural water

机译：从天然水中固相萃取测定溶解的有机物预浓缩物中的酚浓度

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摘要

The concentrations of phenolic moieties in dissolved organic matter pre-concentrated by solid phase extraction (SPE-DOM) from river water and seawater were determined using the Folin-Ciocalteu phenol reagent. Samples were taken from four rivers in the Hiroshima Prefecture of western Japan, and the Seto-Inland Sea. Phenolic concentrations in river samples increased with increasing dissolved organic carbon (DOC) concentrations. In river water, the phenolic concentrations per unit of carbon in SPE-DOM were in the range of 0.48-1.91 mol kg~(-1)-C. In seawater samples, relationships between phenolic and DOC concentrations were not clear, and the phenolic concentrations per unit of carbon were in the range of 0.07-0.76 mol kg~(-1)-C In Osaka Bay, which is a typical enclosed urban coastal area with a large river, phenolic concentrations in the surface seawater collected near the river mouth were higher than those at offshore points. A river water-seawater end-member conservative mixing model indicated that phenolic moieties of DOM in Osaka Bay are characterized by a "net loss" during mixing in the bay. To understand their characteristic behaviors, the photochemical and biological effects on the variation of phenolic concentrations in DOM were investigated.
机译：使用Folin-Ciocalteu苯酚试剂测定通过固相萃取（SPE-DOM）从河水和海水中预浓缩的溶解有机物中的酚类部分的浓度。样品是从日本西部广岛县的四条河和濑户内海采集的。河流样品中的酚类浓度随溶解有机碳（DOC）浓度的增加而增加。在河水中，SPE-DOM中每单位碳的酚浓度为0.48-1.91 mol kg〜（-1）-C。在海水样品中，酚类和DOC浓度之间的关系尚不清楚，并且在典型的封闭城市沿海大阪湾大阪湾中，每单位碳的酚类浓度在0.07-0.76 mol kg〜（-1）-C范围内在河流大的地区，在河口附近收集的地表海水中的酚类浓度高于离岸点。河流水-海水末端成员保守混合模型表明，大阪湾中DOM的酚类部分的特征是在海湾混合过程中出现“净损失”。为了了解它们的特征行为，研究了光化学和生物学效应对DOM中酚浓度变化的影响。

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  • 来源
    《Marine Chemistry》 |2013年第20期|208-215|共8页
  • 作者

    Kazuhiko Takeda; Makoto Moriki; Wakako Oshiro; Hiroshi Sakugawa;

  • 作者单位

    Graduate School ofBiosphere Science, Hiroshima University, 1-7-1, Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8521 Japan;

    Graduate School ofBiosphere Science, Hiroshima University, 1-7-1, Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8521 Japan;

    Graduate School ofBiosphere Science, Hiroshima University, 1-7-1, Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8521 Japan;

    Graduate School ofBiosphere Science, Hiroshima University, 1-7-1, Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8521 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Phenolic content; SPE-DOM; River water; Seawater; Photochemical reaction; Hydroxyl radical;

    机译：酚含量SPE-DOM;河水;海水;光化学反应;羟自由基;

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