首页    期刊浏览 2024年12月05日 星期四
登录注册

文章基本信息

  • 标题:Toxicity and Accumulation of Copper in Nannochloropsis oculata (Eustigmatophyceae, Heterokonta)
  • 本地全文:下载
  • 作者:Hanan M. Khairy
  • 期刊名称:World Applied Sciences Journal
  • 印刷版ISSN:1818-4952
  • 电子版ISSN:1991-6426
  • 出版年度:2009
  • 卷号:6
  • 期号:03
  • 出版社:International Digital Organization for Scientific Information Publications
  • 摘要:

    Algal communities play a crucial role in aquatic food webs by facilitating the transfer of essential trace
    elements and toxic compounds for a wide variety of organisms even to high trophic levels. Economically, algae
    can be utilized for the removal of heavy metals from industrial wastewater or other sources. In the present study,
    the toxicity and the ability of Nannochloropsis oculata (Heterokonta) to accumulate copper metal was
    investigated. N. oculata was cultured in f/ -enriched sea water medium, which was supplemented with 0.04 ìM 2
    (control), 0.10, 0.20, 0.30 and 0.40 ìM Cu+2 and harvested after 3, 6, 9, 12 and 15 days. Changes in cell numbers;
    specific growth rate; chlorophyll-a concentration; copper accumulations and changes in algal cell ultra structure
    were monitored. Results revealed significant (P=0.05) decreases in cell numbers; growth rate and chlorophyll-a
    content with increasing exposure time and concentration. There were significant (P#0.05) increases in the
    accumulation of metal levels in algal tissue when the exposure time and concentration increased. The toxicity
    symptoms of Cu+2 were shown on N. oculata in the form of deformation and damage, disintegrated cell wall and
    death. It can be concluded that N. oculata is able to bind the copper in the culture media.

  • 关键词:Nannochloropsis oculata ; Growth rate; Copper accumulation % Chlorophyll-a % Ultra structure
国家哲学社会科学文献中心版权所有