...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Desalination and water treatment >The distribution and characteristics of dissolved organic matter fractions in urban rivers during icebound season
【24h】

The distribution and characteristics of dissolved organic matter fractions in urban rivers during icebound season

机译：冰封期城市河流中溶解性有机物组分的分布特征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Dissolved organic matter (DOM) in surface waters has important implication for water quality, and also plays an important role in the distribution, bioavailability, and toxicity of pollutants in waters. The distribution, spectroscopic characteristics and chlorine reactivity of DOM fractions in the North Canal in Shenyang during icebound season were investigated. DOM was fractionated using XAD resins into five fractions: hydrophobic acid (HPO-A), hydrophobic neutral (HPO-N), transphilic acid (TPI-A), transphilic neutral (TPI-N) and hydrophilic fraction (HPI). The results showed that dissolved organic carbon (DOC) concentrations in river waters were relatively high during icebound season. DOC values of the bulk DOM, HPO-A, TPI-A and TPI-N in ice phase were lower than those corresponding values in liquid phase. The variation trend of absorbance of ultraviolet light at 254 nm (UV254) along the direction of water was inconsistent with that of DOC in both liquid and ice phases. HPO-A and TPI-A were the dominant ultraviolet (UV)-absorbing compounds in both liquid and ice phases. The variation trend of fluorescent materials in ice phase along the direction of water was similar to that in liquid phase. HPO-A, HPO-N and TPI-N were the main trihalomethane precursors in both liquid and ice phases. Trihalomethane formation potential (THMFP) of HPO-A, TPI-A, HPO-N and TPI-N in ice phase was lower than that in liquid phase. Such knowledge can assist in our understanding of DOM dynamics in urban rivers during icebound season, and thus provides improved insight into the development of effective water quality management.
机译：地表水中的溶解有机物（DOM）对水质具有重要意义，并且在水中污染物的分布，生物利用度和毒性方面也起着重要作用。研究了冰封季节沉阳北运河DOM组分的分布，光谱特征和氯反应性。使用XAD树脂将DOM分为五个馏分：疏水性酸（HPO-A），疏水性中性（HPO-N），亲和酸（TPI-A），亲和性中性（TPI-N）和亲水性部分（HPI）。结果表明，在冰封季节，河水中溶解有机碳（DOC）的浓度相对较高。在冰相中，本体DOM，HPO-A，TPI-A和TPI-N的DOC值低于液相中的相应值。液相和冰相中254 nm（UV254）紫外光沿水方向的吸光度变化趋势与DOC不一致。在液相和冰相中，HPO-A和TPI-A是主要的紫外线吸收化合物。荧光物质在冰相中沿着水的方向的变化趋势与液相中的相似。 HPO-A，HPO-N和TPI-N是液相和冰相中的主要三卤甲烷前体。冰相中HPO-A，TPI-A，HPO-N和TPI-N的三卤甲烷形成潜能（THMFP）低于液相。这些知识可以帮助我们了解冰封季节城市河流中DOM的动态，从而更好地了解有效水质管理的发展。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号