科普專欄–薯不揀單 - 深入淺出–利用細菌蛋白質提取稀土金屬

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。662Please respect copyright.ＰＥＮＡＮＡeZgOiPswmE
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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。662Please respect copyright.ＰＥＮＡＮＡcvu4AqTfJ7
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。662Please respect copyright.ＰＥＮＡＮＡotZVcCe4XW
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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。662Please respect copyright.ＰＥＮＡＮＡr2PFOpoXJe
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這蛋白質有三大特性，662Please respect copyright.ＰＥＮＡＮＡJui5HlEH61
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。662Please respect copyright.ＰＥＮＡＮＡ19DlunRZGx
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2.攝氏95度下仍然正常運作。662Please respect copyright.ＰＥＮＡＮＡAnCCY3lfJb
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3.pH2.5酸性環境仍能正常運作。662Please respect copyright.ＰＥＮＡＮＡL7pY5Jt95l
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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。662Please respect copyright.ＰＥＮＡＮＡa5sZZSL4XC
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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。662Please respect copyright.ＰＥＮＡＮＡOahbybRbCj
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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。662Please respect copyright.ＰＥＮＡＮＡ3TXDekdSOz
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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/toc662Please respect copyright.ＰＥＮＡＮＡKw7zWocOCP
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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。662Please respect copyright.ＰＥＮＡＮＡJwJO17n7en
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Link:662Please respect copyright.ＰＥＮＡＮＡ3HcbU64oH6
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio662Please respect copyright.ＰＥＮＡＮＡemBcCp9dDM
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有興趣接收科學資訊的話，歡迎follow IG: potatopigtongue。662Please respect copyright.ＰＥＮＡＮＡoi93KIaJ9o
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Ref1:https://pubmed.ncbi.nlm.nih.gov/30705185/662Please respect copyright.ＰＥＮＡＮＡRJMpo6nK1o
Ref2:https://pubs.acs.org/doi/10.1021/acs.inorgchem.0c01303662Please respect copyright.ＰＥＮＡＮＡuTwOrTpd9D

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