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。679Please respect copyright.PENANAM2v275jVaG
679Please respect copyright.PENANAvbccyLVV1u679Please respect copyright.PENANAMC9jnTNnmz
679Please respect copyright.PENANAt45HmCpDdP
雖然它們被稱為稀土,但事實上它們並不真的是如此稀有。679Please respect copyright.PENANAa0GDNz1N4D
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。679Please respect copyright.PENANAO1q94HYI2I
679Please respect copyright.PENANA9S97uY1ps7
(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。679Please respect copyright.PENANA7l15bAFq1m
679Please respect copyright.PENANAJGr48SJT0P679Please respect copyright.PENANAT7AVa62ZyK
679Please respect copyright.PENANA15kuTuDPrP
這蛋白質有三大特性,679Please respect copyright.PENANANHBWU8USUC
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。679Please respect copyright.PENANAj9sHnBYXGQ
679Please respect copyright.PENANAZGSUvUjvlv
2.攝氏95度下仍然正常運作。679Please respect copyright.PENANAQAcEgJdrxG
679Please respect copyright.PENANASzHp2bzEeW
3.pH2.5酸性環境仍能正常運作。679Please respect copyright.PENANAsVZPrt5yb9
679Please respect copyright.PENANASxVI9ipnOz
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。679Please respect copyright.PENANALrkrLUvlgB
679Please respect copyright.PENANAEWDqMEyVtb
(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。679Please respect copyright.PENANAd5GBiuBXlo
679Please respect copyright.PENANAbHLBlddcuu679Please respect copyright.PENANAdsYbJZ7UWY
679Please respect copyright.PENANAJzFTvTQvR3
679Please respect copyright.PENANADckoVMrNWr
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。679Please respect copyright.PENANAAo1fqepktI
679Please respect copyright.PENANAGqS7WXdroS
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/toc679Please respect copyright.PENANAdxqihAY1Um
679Please respect copyright.PENANA4y0NU1NHTm
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。679Please respect copyright.PENANArPCPTwFnXb
679Please respect copyright.PENANASs9qXHGDjM
Link:679Please respect copyright.PENANAPVPYfsojUR
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio679Please respect copyright.PENANAu3ZnJodoxw
679Please respect copyright.PENANACmKV12mBdv
679Please respect copyright.PENANAvwdlPwAalC
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。679Please respect copyright.PENANAxB0jvY9ZMe
679Please respect copyright.PENANAuUxrBJR8IM
679Please respect copyright.PENANAegU4Nm2Fnm
Ref1:https://pubmed.ncbi.nlm.nih.gov/30705185/679Please respect copyright.PENANAvAZSPcjA4q
Ref2:https://pubs.acs.org/doi/10.1021/acs.inorgchem.0c01303679Please respect copyright.PENANAWz8oV5vLs2
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科普專欄–薯不揀單
作者:
薯仔聞茱莉

篇 #38
深入淺出–利用細菌蛋白質提取稀土金屬
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