Determination of iron speciation in lake and its effects through iron availability on algal blooming

湖中铁形态的测定及其铁可用性对藻类繁殖的影响

基本信息

  • 批准号:
    17310013
  • 负责人:
  • 金额:
    $ 10.07万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2005
  • 资助国家:
    日本
  • 起止时间:
    2005 至 2007
  • 项目状态:
    已结题

项目摘要

Analytical methods were developed to determine the concentration of total dissolved iron and its chemical speciation in freshwater using cathodic stripping voltammetry (CSV) with 1-nitroso-2-naphthol (NN) at pH 8.1.The horizontal distribution and temporal variation of dissolved iron and its chemical speciation in Lake Kasumigaura and its inflowing rivers were investigated. Concentrations of dissolved iron and its organic ligands clearly decreased as lake water flowed from the river entry points toward the center of the lake, indicating their riverine origin. The fraction of iron occurring in organic complexes tended to increase with the water -flow. Most of the dissolved iron was present as organic complexes (882% 99.9%).Effects of iron complexation with DOM on algal growth in the eutrophic Lake Kasumigaura were assessed using 2 species of cyanobacteria, Microcystis aeruginosa and Planktothrix agardhii, by combining the algal growth potential (AGP) test and pretreatment of DOM decomposition by UV irradiation. Iron limited the 2 species, as did nitrogen and phosphorus in Lake Kasumigaura. Moreover, the growth of the 2 species was inhibited by iron complexation with DOM.The growth characteristics of two species of cyanobacteria, Microcystis aeruginosa and Planktothrix agardhii, in iron-limited continuous cultures were investigated. The relationships between dissolved iron concentration, cell quota of iron, and population growth rate were determined applying two equations, Monod's and Droop's equations. A kinetic model under iron limitation was developed based on the growth characteristics determined in this study. The model simulation suggested that Microcystis is a superior competitor under iron limitation.
采用1-亚硝基-2-萘酚(NN)阴极溶出伏安法(CSV),在pH8.1的条件下,测定了淡水中溶解态铁的含量及其化学形态。溶解铁及其有机配体的浓度明显下降,湖水从河流入口点流向湖中心,表明其河流起源。铁在有机络合物中所占的比例随水流量的增加而增加.以富营养化的霞浦湖为研究对象,以铜绿微囊藻(Microcystisaeruginosa)和阿氏浮游发藻(Planktothrixagardhii)为实验材料,结合藻类生长势(AGP)测定和紫外线照射分解DOM的预处理,研究了铁与DOM络合对藻类生长的影响。铁限制了这两个物种,氮和磷在霞浦湖。研究了铜绿微囊藻(Microcystis aeruginosa)和阿氏浮游发藻(Planktothrix agardhii)在铁限制连续培养条件下的生长特性。应用莫诺方程和德鲁普方程确定了溶解铁浓度、铁细胞配额和种群增长率之间的关系。根据本研究确定的生长特性,建立了铁限制下的生长动力学模型。模拟结果表明,微囊藻在铁限制条件下是一个上级竞争者。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Study on the dominance of cyanobacterial species in Lake Kasumigaura.
霞浦湖蓝藻物种优势度研究.
  • DOI:
  • 发表时间:
    2008
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Gou H.;et. al.
  • 通讯作者:
    et. al.
A new problem in lake-not easily degradable organic matter.
湖泊的新问题——不易降解有机物。
  • DOI:
  • 发表时间:
    2006
  • 期刊:
  • 影响因子:
    0
  • 作者:
    S.;Inoue;Y.;Oshima;H.;Usuki;M.;Hamaguchi;Y.;Hanamura;N.;Kai;Y.;Shimasaki;T.;Honjo;Imai A.
  • 通讯作者:
    Imai A.
Dissolved iron and its speciation in a shallow eutriophic lake and its in flowing rivers
浅富营养湖及其流动河流中的溶解铁及其形态
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Nagai T.;et. al.
  • 通讯作者:
    et. al.
Characterization of DOM in Lake Kasumigaura and DOM sources in its catchment area by resin fractionation method and three-dimensional excitation-emission fluorescence spectra.
采用树脂分馏法和三维激发发射荧光光谱表征霞浦湖 DOM 及其流域 DOM 来源。
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Komatus K.;et. al.
  • 通讯作者:
    et. al.
Stable carbon isotopic characterization of DOC and its humic fraction in Lake Kasumigaura
霞浦湖 DOC 及其腐殖质组分的稳定碳同位素表征
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Nara F.W.;Imai A.;Matsushige K.;Komatsu K.
  • 通讯作者:
    Komatsu K.
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IMAI Akio其他文献

IMAI Akio的其他文献

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{{ truncateString('IMAI Akio', 18)}}的其他基金

Study on linkages between molecular size, chemical composition and reactivity of dissolved organic matter in aquatic environments
水生环境中溶解有机物的分子大小、化学成分和反应性之间的联系研究
  • 批准号:
    25289175
  • 财政年份:
    2013
  • 资助金额:
    $ 10.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Development of an optimal layout design method of a revolutionary container terminal for mega-containerships
开发巨型集装箱革命性集装箱码头优化布局设计方法
  • 批准号:
    22510149
  • 财政年份:
    2010
  • 资助金额:
    $ 10.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Origin, characteristics and mass balance of recalcitrant dissolved organic matter in lake environments
湖泊环境中难溶有机物的来源、特征和质量平衡
  • 批准号:
    21241008
  • 财政年份:
    2009
  • 资助金额:
    $ 10.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Study on memories of Vietnam War in Vietnam
越南战争记忆研究
  • 批准号:
    20510226
  • 财政年份:
    2008
  • 资助金额:
    $ 10.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Operation Planning of Simultaneous Berth-Quay Crane Allocation at a Container Terminal for Mega-ships
超大型集装箱码头泊位岸桥同步配置作业方案
  • 批准号:
    17510123
  • 财政年份:
    2005
  • 资助金额:
    $ 10.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Study on Memories of War in Vietnam after Vietnam War
越战后越南战争记忆研究
  • 批准号:
    16510185
  • 财政年份:
    2004
  • 资助金额:
    $ 10.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Dynamics and trihalomethane formation potential of recalcitrant dissolved organic matter in lake water
湖水中难溶解有机物的动态和三卤甲烷形成潜力
  • 批准号:
    12450215
  • 财政年份:
    2000
  • 资助金额:
    $ 10.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Evaluation on trihalomethane formation potentials of dissolved organic matter using the dissolved organic carbon fractionation method.
利用溶解有机碳分馏法评价溶解有机物的三卤甲烷形成潜力。
  • 批准号:
    09650614
  • 财政年份:
    1997
  • 资助金额:
    $ 10.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

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典型幔源火成碳酸岩体(加拿大Prairie Lake)镁钙同位素地球化学研究
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