稀土泛指17種特性相似的金屬,較常用在作醫療設備之上,其中一種 (Promethium, Pm)為具放射性的物質。585Please respect copyright.PENANAk4FJOWk8G8
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雖然它們被稱為稀土,但事實上它們並不真的是如此稀有。585Please respect copyright.PENANA3hy23FjIDs
圖1圖中的圓點為各種稀土金屬蘊藏量,大部份與錫的含量相約,且遠高於大自然間的水銀含量。585Please respect copyright.PENANAabmB1mRomq
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(圖2)近日有科學家發表文章(Ref2),從需要攝取稀土金屬才能運作的細菌中抽取一種名為Lanmodulin的蛋白質。585Please respect copyright.PENANAQqdTtjmoN5
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這蛋白質有三大特性,585Please respect copyright.PENANAYZoQsEPDFV
1.能夠選擇性地黏上稀土金屬,不會黏上銅鋅鎂等非稀土金屬。585Please respect copyright.PENANAF96EJPLIYd
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2.攝氏95度下仍然正常運作。585Please respect copyright.PENANAWDPgQhYaYY
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3.pH2.5酸性環境仍能正常運作。585Please respect copyright.PENANAzfeA1ONRYt
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對比常用的一種金屬提取物質EDTA,Lanmodulin不但之對稀土金屬更具選擇性,而且親和力更高出5-10倍或以上。585Please respect copyright.PENANA7cIncvT8ID
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(圖3)電子廢物普遍會溶解在pH3.0的酸性環境使金屬呈離子狀態,有著Lanmodulin的幫助下,舊有的繁複及高能源消耗的提取稀土金屬辦法亦將能逐漸退出市場,各國亦能更有效從各電子儀器中回收稀土金屬,再進一步減少對中國的依賴。585Please respect copyright.PENANAifEmFv2BCQ
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如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。585Please respect copyright.PENANA064KyucyhY
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Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc585Please respect copyright.PENANA8siBKi4OPS
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同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。585Please respect copyright.PENANA64RoqUOLfx
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Link:585Please respect copyright.PENANAxBp4mH5fa7
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio585Please respect copyright.PENANA8vIO9G12q1
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有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。585Please respect copyright.PENANAZy7SwO7l7Y
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Ref1:https://pubmed.ncbi.nlm.nih.gov/30705185/585Please respect copyright.PENANALE7c0pWvOI
Ref2:https://pubs.acs.org/doi/10.1021/acs.inorgchem.0c01303585Please respect copyright.PENANAud8iQ8WDf8