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Effect of combined pollution of heavy metals on river ecosystem and its evaluation

重金属复合污染对河流生态系统的影响及其评价

基本信息

批准号：
18560528
负责人：
UMITA Teruyuki
金额：
$ 2.44万
依托单位：
Iwate University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560528/
关键词：
River ecosystem Metals Combined pollution Algae

项目摘要

The effect of combined metals pollution such as Ca, Mg, Zn and Al on survival of Nitzschia palea (NIES-487), typical diatom found in Japanese rivers, was studied in batch experiments to assess river ecosystem. The experiments were conducted under the condition of pH 6, 25℃, continuous irradiation of 4000 lx and several times of stirring in a day. The concentrations of chlorophyll a were monitored during the experiments.It was shown that the addition of Ca or Mg mitigated the inhibition of polymerized Al to the survival of Nitzschia palea. However, their concentrations in Japanese rivers were lower than those in the experiments. Then, it was concluded that mitigation of Ca or Mg was not significant.Zn less than 100μg/L did not affect the survival of Nitzschia palea. At 30μg/L of Zn, which is the concentration of not affecting its survival, coexistent polymerized Al inhibited the survival of Nitzschia palea under low concentrations. However, combined effect of Zn and polymerized Al did not show the inhibition under high polymerized Al concentrations because of its high inhibition effect.From these results, it was concluded that combined metals pollution of Zn and polymerized Al inhibited the algal survival even under neutral pH condition and 30μg/L of Zn, which is the upper limit of Japan water quality standard. It should be noted that Al eluted from soils or discharged from mines and industrial works has the possibility of affecting adverse effect on river ecosystem.

采用批量实验研究了Ca、Mg、Zn和Al复合金属污染对日本河流中典型硅藻Nitzschia palea（NIES-487）存活的影响。实验条件为pH 6、25℃、4000 lx连续光照、一天多次搅拌。结果表明，添加Ca或Mg可减轻聚合铝对内眦菱形藻存活的抑制作用。然而，它们在日本河流中的浓度低于实验中的浓度。结果表明，Ca、Mg对内稃菱形藻的存活影响不显著，Zn浓度低于100μg/L时，内稃菱形藻的存活没有受到影响。当Zn浓度为30μg/L时（即Zn不影响内眦菱形藻存活的浓度），共存的聚合铝在低浓度下抑制内眦菱形藻的存活。结果表明，Zn和聚合Al复合污染对藻类的生长有抑制作用，即使在中性pH条件下，Zn浓度为30μg/L（日本水质标准上限）时，Zn和聚合Al复合污染也能抑制藻类的生长。值得注意的是，从土壤中溶出的铝或从矿山和工业工厂排放的铝有可能对河流生态系统产生不利影响。

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）

都市の自然再生プランニング(第1章河川環境とその再生)

城市自然恢复规划（第一章河流环境及其恢复）

DOI：
发表时间：
2008
期刊：
影响因子：
0
作者：
Atsushi Sasaki;Noriaki Tate;Satoshi Takahashi;Ayumi Ito;Jiro Aizawa and Teruyuki Umita;海田輝之(共著)
通讯作者：
海田輝之(共著)

付着藻類を指標としたアルミニウムの河川生態系への影響に関する基礎的研究

以附着藻类为指标的铝对河流生态系统影响的基础研究

DOI：
发表时间：
2006
期刊：
環境工学研究論文集 43
影响因子：
0
作者：
佐々木貴史;館紀昭;伊藤歩;相沢治郎;海田輝之
通讯作者：
海田輝之

Nature Regeneration of cities (Chap. 1 River environment and its regeneration)

城市的自然更新（第一章河流环境及其更新）

DOI：
发表时间：
2008
期刊：
Tiikisaisei Kennkyuukai
影响因子：
0
作者：
Shingo NOMOTO;Hideki YOSHIDA;Kunio KAWAUCHI;吉田英樹;Hideki YOSHIDA;Hideki YOSHIDA;Hideki YOSHIDA;Hideki YOSHIDA;Teruyuki Umita and Ayumi Ito
通讯作者：
Teruyuki Umita and Ayumi Ito

Estimation of the Effects of Al Hydrolysis Products on River Ecosystems Using Attached Algae as Bioindicator

使用附着藻类作为生物指示剂估算铝水解产物对河流生态系统的影响