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Distributions of rare earth elements in Japanese estuaries
https://repo.qst.go.jp/records/69410
https://repo.qst.go.jp/records/69410c96f2bdf-d7be-4401-bb7c-21dad24b2b26
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-07-22 | |||||
| タイトル | ||||||
| タイトル | Distributions of rare earth elements in Japanese estuaries | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Takata, Hyoe
× Takata, Hyoe× Aono, Tatsuo× Tagami, Keiko× Uchida, Shigeo× 高田 兵衛× 青野 辰雄× 田上 恵子× 内田 滋夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Introduction and Methods Direct determination using ICP-MS for rare earth elements (REEs) in seawater, which are presumably present at less than the detection limit, is a difficult analytical task in the presence of seawater matrix. A simple and rapid method to separate and concentrate REEs in seawater was developed using a new chelating resin, NOBIAS chelate-PA1, which is a polyamino-polycarboxylic acid type resin. The resin was then used in an investigation of the geochemical behaviors of REEs in Japanese estuaries which are reported here. \nResults and Discussion The REEs were recovered at more than 90% for a pH ranging between 5 and 6 in spiked seawater samples which were diluted in a salinity value ranged from 0 to 34. Total procedural blanks for REEs for the present study were lower than 0.1 ppt. It was concluded that the chelating resin can be applied for the preconcentration of REEs in estuarine water samples. The determined REE concentrations in the natural water samples indicated geochemical properties in the Japanese estuaries. These concentrations increased rapidly at low salinity (~1). Such a trend has been observed in some rivers [1, 2]. The increase in REEs concentrations was attributed to the salt-induced desorption from resuspended particles in river waters [3]. The concentrations of the REEs were constant at high salinity (>20) near the mouth of the rivers, indicating the removal of REEs during mixing in the estuary at a salinity value less than 20, as has been reported in other estuaries [2]. The REE concentrations slightly decreased with distance from the mouth of the rivers. This work has been partially supported by the Agency for Natural Resources and Energy, the Ministry of Economy, Trade and Industry (METI), Japan. \n [1] Nozaki et al (2000) GCA 64, 3975-3982. [2] Nozaki et al. GCA 64, 3983-3994. [3] Elderfield et al. (1990) GCA 54, 971-991. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The 18th annual V.M. Goldschmidt Conference | |||||
| 発表年月日 | ||||||
| 日付 | 2008-07-18 | |||||
| 日付タイプ | Issued | |||||
