• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Monitoring and Assessment >Chemical constraints on new man-made lakes
【24h】

Chemical constraints on new man-made lakes

机译：新的人造湖的化学限制

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

The formation of reservoirs often affects water quality strongly, with the changes in the physico-chemical properties being ascribed to decomposition of remaining organic matter arising from leaching and (biological and chemical) breakdown processes. In this study, experiments under laboratory conditions were performed to show that the nature of the course partic-ulate organic matter (CPOM; i.e., leaves, branches, barks, and litter) determines the decomposition kinetics in new reservoirs. Effects on the water quality can be of short-, mid-, and long-term duration for all types of CPOM, as indicated in the mathematical modeling of the decomposition kinetics. Leaves and litter displayed the shortest half-life times (51 and 40 days, respectively) and the highest potential of leaching/oxidation of labile compounds (19 and 21 %, respectively). On the other hand, decomposition of branches and barks generated the lowest oxygen consumption (74 and 44 mg oxygen/g dry mass (DM), respectively). During formation of the reservoir, the incorporation and decomposition of organic matter prevailed over material exportation. Therefore, in addition to a decrease in oxygen availability the concentration of biochemical oxygen demand (BOD) and nutrients increased. After the filling stage, there was significant loss of organic matter via oxidation, sedimentation, biological assimilation, and export, thus causing the BOD concentration and the fertility of the water to decrease.
机译：储集层的形成通常会严重影响水质，其理化性质的变化归因于淋溶和（生物和化学）分解过程中残留的有机物的分解。在这项研究中，在实验室条件下进行的实验表明，过程中的颗粒有机物（CPOM；即叶，枝，树皮和垃圾）的性质决定了新油藏的分解动力学。如分解动力学的数学模型所示，所有类型的CPOM对水质的影响可能是短期，中期和长期的。叶片和凋落物的半衰期最短（分别为51天和40天），不稳定化合物的浸出/氧化潜力最高（分别为19％和21％）。另一方面，分支和树皮的分解产生最低的氧气消耗（分别为74和44 mg氧气/ g干质量（DM））。在储层形成过程中，有机物的掺入和分解胜过材料的出口。因此，除了减少氧气的供应外，生化需氧量（BOD）和营养素的浓度也增加了。灌装阶段后，有机物通过氧化，沉淀，生物同化和输出而大量损失，从而导致BOD浓度和水的肥力降低。

著录项

  • 来源
    《Environmental Monitoring and Assessment》 |2013年第12期|10177-10190|共14页
  • 作者

    Marcela B. Cunha-Santino; Alexandre L. Bitar; I. Bianchini Jr.;

  • 作者单位

    Programs de Pos-Graduacao em Ecologia e Recursos Naturais, Departamento de Hidrobiologia, Universidade Federal de Sao Carlos, Rodovia Washington Luiz, km 235, Cx. Postal 676, 13565-905 Sao Carlos, Sao Paulo, Brazil;

    Programs de Pos-Graduacao em Ecologia e Recursos Naturais, Departamento de Hidrobiologia, Universidade Federal de Sao Carlos, Rodovia Washington Luiz, km 235, Cx. Postal 676, 13565-905 Sao Carlos, Sao Paulo, Brazil;

    Programs de Pos-Graduacao em Ecologia e Recursos Naturais, Departamento de Hidrobiologia, Universidade Federal de Sao Carlos, Rodovia Washington Luiz, km 235, Cx. Postal 676, 13565-905 Sao Carlos, Sao Paulo, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Decay; Leaf; Litter; Bark; Branch; Oxygen consumption; Kinetic model; Mineralization;

    机译：衰变;叶;垃圾;吠;科;耗氧量动力学模型矿化;

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