文章摘要
极北海带对氮、磷吸收和重金属富集作用的研究
Determination of Nitrogen, Phosphorus Absorption and Heavy Metal Accumulation in Laminaria hyperborea
投稿时间:2019-03-11  修订日期:2019-04-01
DOI:
中文关键词: 极北海带  富营养化  温度  重金属  生物修复
英文关键词: Laminaria hyperborea  Eutrophication  Temperature  heavy metal ions  Bioremediation
基金项目:
作者单位E-mail
袁艳敏 上海海洋大学 yuanym2991@163.com 
刘福利 农业农村部海洋渔业可持续发展重点实验室 liufl@ysfri.ac.cn 
杜欣欣 青岛农业大学  
梁洲瑞 农业农村部海洋渔业可持续发展重点实验室  
汪文俊 农业农村部海洋渔业可持续发展重点实验室  
孙修涛 农业农村部海洋渔业可持续发展重点实验室  
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中文摘要:
      极北海带(Laminaria hyperborea)分布于大西洋东北海域,有很高的经济和生态价值,有望成为我国海藻资源增值的对象。本文通过分析极北海带在不同温度下对N、P营养盐的吸收,以及对不同重金属离子的吸附,研究其对富营养化和重金属的去除能力。结果表明:(1)温度9-13℃时,极北海带对氮、磷的吸收率均最高,其中72h后其对磷的吸收率达到了95%-98%,对氨氮的吸收率为96%,对硝酸氮的吸收率约为42%,表明其对氮、磷有显著的去除作用。(2)极北海带对砷的富集量为168.33 mg/kg,藻体表面和内部砷离子含量无显著差异,分别占藻体砷离子总量的55%和45%,砷离子处理6d后极北海带的相对生长速率为-0.92%/d,极北海带生长不正常。极北海带对镉离子的吸附量为15mg/kg,且91%的镉离子位于藻体表面,仅9%的镉离子位于藻体内部,相对生长速率为5.78%/d,说明其对极北海带生长有抑制。极北海带对铅离子的吸附量为320 mg/kg,其中96.5%的铅离子被吸附于藻体表面,3.5%的铅离子位于极北海带藻体内部,相对生长速率为6.73%/d,表明铅对极北海带的生长无显著影响。
英文摘要:
      Laminaria hyperborea is an economically and ecologically important kelp. It can grow lushly in the subtidal zone and from the seaweed forest, playing significant ecological function. In this study, the absorption rates of nitrogen and phosphorus of L.hyperborea was determined at different temperature (5, 9, 13, 17℃), as well as relative growth rate (RGR) and accumulation towards selected heavy metal ions (Arsenic ions As2+, Cadmium ions Cd2+, Lead ions Pb2+), aiming to evaluate whether L. hyperborea as a potential candidate species is feasible for marine bioremediation. The main results are as follows: (1) the experimental individuals illustrated maximum absorption rate to nitrogen and phosphorus at 9-13℃. After 72h, the absorption rates of phosphorus, ammonia nitrogen and nitrogen nitrate were 95%-98%, 96% and 42% of those in maximum, respectively, indicating that the removal of nitrogen nitrate, ammonia nitrogen, and phosphorus by L.hyperborea are significant. (2) The total Arsenic ions content accumulated in the L.hyperborea was 168.33 mg/kg, it was no significant difference between the surface (55%) and inner (45%) of algae; the relative growth rate was -0.92%/d when L. hyperborea were treated with arsenic ions for 6d. The total Cadmium ions content accumulated in L. hyperborea was 15mg/kg. The content on the surface (91%) was significantly higher compared to inner (9%); the relative growth rate of those individuals who were treated in Cd2+ enriched solution for 6d was 5.78%/d (lower than control). The total Lead ions content accumulated in the L.hyperborea was 320 mg/kg. The surface concentration (96.5%) was significantly higher compared to that of the inner (3.5%) of algae; the relative growth rate of those individuals who were treated in Pb2+ enriched solution for 6d was 6.73%/d which was no significant difference with control condition. The results suggested L. hyperborea could be an ideal candidate in marine bioremediation.
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