希土類元素パターンから見た近年の新潟県近辺海域における海藻および海水試料の化学的特徴
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概要
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In order to investigate the recent state of marine environment in Niigata Prefecture, to investigate the biological concentration in the ocean, and to investigate the behavior of rare earth elements (REEs) in the ocean, REEs in many kinds of seaweed samples as well as seawater samples in Niigata Prefecture were determined by inductively coupled plasma mass spectrometry (ICP-Ms). Seaweed and seawater samples were collected at 10 points on the coast in Niigata Prefecture (i. e. , Sanpoku Town, Niigata City Iwamuro Village, Izumozaki Town, Kashiwazaki City Nou Town, Ryotu City Aikawa Town, Sawata Town and Akadomari Village) from 2000 to 2002. The following points have been clarified by the present study. (1) .The concentrations of REEs in the seaweed gathered on the coast in Niigata Prefecture were about 10^3 to 10^5 times higher than those in the seawater; and the enrichment factors of REEs is generally larger in HERB than LREE. (2) A large difference was found between REE pattern of the seaweed samples taken on the coast in Niigata Mainland and that on the coast in Sado Island. (3) The degrees of "positive Ce-anomaly in seaweed samples" and "negative Ce-anomaly in seawater samples" in Niigata Mainland were also larger than those in Sado Island. (4) Positive Gd-anomaly (which seems to be an artificial origin) was found in REE patterns of some seawater samples, (5) REE pattern of seaweed and seawater samples may be an useful tracer of investigating the surrounding marine environment.
- 日本環境化学会の論文
- 2003-09-00
日本環境化学会 | 論文
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