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Acido umico

Acido umico

          
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About the Book

Studi precedenti nel nostro laboratorio hanno indicato l'ossidazione dell'acido umico da parte del Fe(VI), ma l'estinzione della fluorescenza da parte di un prodotto di reazione, il Fe(III), ha portato a incertezze sull'entità dell'ossidazione. Le interazioni del Fe(VI)/Fe(III) con gli acidi umici (HAs) sono state studiate utilizzando la spettroscopia di fluorescenza a scansione sincrona (SSF), la spettroscopia UV-Vis e la spettroscopia DART-MS. Nello studio di fluorescenza, è stata riscontrata un'immediata diminuzione dell'intensità SSF dopo l'aggiunta di Fe(VI) e Fe(III) a tutte le miscele di HA, il che ha suggerito l'esistenza di una reazione tra gli HA con il Fe(VI) e il Fe(III). Queste reazioni sono state ulteriormente analizzate quantitativamente mediante spettroscopia UV-vis. I risultati mostrano che gli HA si ossidano immediatamente dopo l'aggiunta di Fe(VI). Inoltre, gli HA reagiscono con il Fe(III), formando un complesso tra i gruppi funzionali degli HA e il Fe(III). Queste interazioni sono state ulteriormente studiate con la variazione del pH e con il DART-MS. I risultati mostrano un numero maggiore di picchi m/z inferiori dopo la miscelazione degli HA con il Fe(VI) rispetto a prima della miscelazione, suggerendo che l'ossidazione degli HA da parte del Fe(VI) porta alla frammentazione di questi HA.


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Product Details
  • ISBN-13: 9786207506996
  • Publisher: KS Omniscriptum Publishing
  • Publisher Imprint: Edizioni Sapienza
  • Height: 229 mm
  • No of Pages: 72
  • Spine Width: 4 mm
  • Width: 152 mm
  • ISBN-10: 6207506995
  • Publisher Date: 02 May 2024
  • Binding: Paperback
  • Language: Italian
  • Returnable: N
  • Weight: 118 gr

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