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。464Please respect copyright.PENANANoAJVhJZX9
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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。464Please respect copyright.PENANAtQFxUj7qk2
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。464Please respect copyright.PENANAide8ZBj0sw
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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。464Please respect copyright.PENANAFsyJXBN2Xg
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這蛋白質有三大特性,464Please respect copyright.PENANAFqQq9G81rx
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。464Please respect copyright.PENANAwuFZ3ifrNM
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2.攝氏95度下仍然正常運作。464Please respect copyright.PENANAUIfY6QL8Yv
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3.pH2.5酸性環境仍能正常運作。464Please respect copyright.PENANA1oMYhLPlIZ
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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。464Please respect copyright.PENANAj9l7ZSR4L6
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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。464Please respect copyright.PENANAnbM5QzhpYj
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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。464Please respect copyright.PENANAcj6arOkCtX
464Please respect copyright.PENANA5BfLGK01gX
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/toc464Please respect copyright.PENANArcxsJ0Tn2b
464Please respect copyright.PENANAAzVgOBBybO
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。464Please respect copyright.PENANAB4hSRjqrfS
464Please respect copyright.PENANAFLLjzooKr0
Link:464Please respect copyright.PENANAa8r8zUkHTI
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio464Please respect copyright.PENANA3mbu1jnJiz
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有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。464Please respect copyright.PENANAluex6uhu9A
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Ref1:https://pubmed.ncbi.nlm.nih.gov/30705185/464Please respect copyright.PENANAHTAi7qH4Cv
Ref2:https://pubs.acs.org/doi/10.1021/acs.inorgchem.0c01303464Please respect copyright.PENANAt9eZqST8yY
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #38
深入淺出–利用細菌蛋白質提取稀土金屬
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