| 海藻中稀土元素的初步研究 |
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| 引用本文： | 严小军,范晓,侯小琳.海藻中稀土元素的初步研究[J].海洋与湖沼,1999,30(5):558-563. |
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| 作者姓名： | 严小军 范晓 侯小琳 |
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| 作者单位： | 中国科学院海洋研究所!青岛，266071，中国科学院海洋研究所!青岛，266071，中国科学院高能物理研究所!北京，100080 |
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| 基金项目： | 国家“九五”攻关课题!96—916-04-01 |
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| 摘 要： | 于１９９６年３月地岛海区采集了８种常见海藻，采用中子活化法（ＰＣＡ－Ⅱ／ＮＡＡ）测定了其中的Ｌａ、Ｓｍ、Ｃｅ、Ｅｕ、Ｌｕ、Ｎｄ、Ｓｃ、Ｙｂ等８种稀土元素的总含量及其水溶性成分的比例，并与国外报道的相关数据作了比较。结果表明，海藻中含有比陆地植物丰富得多的稀土元素，绿藻中的石莼，刺松藻含量最丰，
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| 关 键 词： | 海藻 稀土元素 中子活化法 |
| 收稿时间： | 1998/11/3 0:00:00 |
| 修稿时间： | 1999/5/15 0:00:00 |
DETERMINATION OF RARE EARTH ELEMENTS IN SEAWEEDS |
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| YAN Xiao-jun,FAN Xiao and HOU Xiao-lin.DETERMINATION OF RARE EARTH ELEMENTS IN SEAWEEDS[J].Oceanologia Et Limnologia Sinica,1999,30(5):558-563. |
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| Authors: | YAN Xiao-jun FAN Xiao and HOU Xiao-lin |
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| Institution: | Institute of Oceanology, The Chinese Academy of Sciences,Qingdao, 266071;Institute of Oceanology, The Chinese Academy of Sciences,Qingdao, 266071;Institute of High Energy Physics, me Chinese Academy of Sciences, Beijing, 100080 |
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| Abstract: | The study of the content and composition of rare earth elements in seaweed is veryimportant for the investigation of the biogeochemistry of the ocean, and the application of seaweedin human health or agricultural fields. Eight species of seaweeds were collected in Qingdao coastaIarea in 1996, and the content of rare earth elements, including te Sm, Ce, Eu, Lu, Nd, Sc, Yb,were determined by instrumental neutron activation analysis as follows: the samples were sealed inpolyethylene capsules and sent into the indiahon channel of a mihiatare neutron source reactor. Theirradiated samples were measured with a high purity germamum detector coup1ed with a PC mulh-channel analysis system. The element contentS were calculated by the relative comparahve method.ContentS (mg/kg fresh weight) of La, Sm, Ce, Eu, Lu, Nd, Sc, Yb were 1.752, 0,244, 2.82, 0.039,0.018, 1.38, 0.448, 0.052 in Codium fragile, 1.872, 0.215, 3.666, 0.053, 0.015, 1.378, 0.214, 0.046in Ulva pertusa, 0.22, 0.031, 0.31 1, 0.006, 0.002, 0.18, 0.08, 0.006 in Enteromorpha sp., ND ND1.134, 0.01 1, ND, ND 0.168. 0.02 in hargassum thunbergii, 0.36, 0.041, 0.412, 0.006, ND ND0.062, 0.009 in Gracilaria sp., 0.399, 0.04, 0.826, 0.01, ND ND, 0.12, 0.025 in Sargassumkjellmanianum, 0.085, 0.015, 0.123, 0.002, ND ND, 0.032, 0.005 in rsctyota sp.; ND ND, 0.345,0.002, ND, ND 0.043, ND 0.391 in Iaminaria japonica. The results showed that marine algae canascurnulate rare earth elements by the order as Ulva > Codium > Sargassum > Gracilaria >Laminaria > Dictyota(0.27-7.5mg / kg fresh algal material). Part of all rare earth elements can beexmeted easily by water, the solubility was ranged from 51% to 75% for La 41% to 75% for Sm,34% to 74% for Ce, 40% to 69% for Eu, 46% to 73% for Lu, 43% to 75 for Nd, 41% to 79%for Sc, and 31% to 74% for Yb. lt implied that rare eaIth existed in marine algae mainly assoluble chioride salt and insoluble phosphate salt The sighificance of the detedrinahon of na eartbelements related to seaweed liquld concentrate and ecological equilibriurn was discussed. |
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| Keywords: | Seaweeds Rare earth elements Neutron activation analysis Health |
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