Document Details

Document Type : Article In Journal 
Document Title :
Metallic nanoparticle enrichment at low temperature, shallow CO(2) seeps in Southern Italy
إضافة مواد معدنية متناهية الصغر عند درجات حرارة منخفضة وتركيزات ضئيلة من ثانى أكسيد الكربون فى جنوب إيطاليا
 
Subject : Enviromental sciences 
Document Language : English 
Abstract : We report on metal enrichment along a natural pH gradient owing to increased CO2 degassing at cold, shallow seeps of Vulcano Island in the Mediterranean Sea, off Sicily. We assessed composition of unfiltered and filtered seawater (b100 nm) along acidic zones ranging between ambient and pH 5, and showed that most seep derived elements are present as nanoclusters which then aggregate into larger colloids while mixing with ambient seawater along a pH gradient. Size and elemental composition of such naturally occurring nanoparticles assessed by modern characterisation methods were in good agreement with the results from conventional analytical methods. We provide analytical evidence for the presence in the water column of a large fraction of seep derived elements (e.g. approximately 50% of iron, over 80% of Mn, 100% of Cr, S and Zn) in the form of nano sized particles (e.g. b100 nm) even at typical open ocean pHs. We launch in situ sampling protocols and sample preparation procedures for multi-method suitable to obtain accurate measurements on nanoparticles from environmental samples. Based on our results a first insight to the formation of natural nanoparticles at cold CO2 seeps is presented and the persistence of such nano-clusters in the surrounding seawater is stipulated. 
ISSN : 0304-4203 
Journal Name : Marine Chemistry 
Volume : 140 
Issue Number : 1 
Publishing Year : 1433 AH
2012 AD 
Article Type : Article 
Added Date : Sunday, November 11, 2012 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
Enikö KadarKadar, Enikö Researcher enik@pml.ac.uk
Fisher AndrewAndrew, Fisher Researcher  
Stolpe BjörnBjörn, Stolpe Researcher  
M. Harrison RoyRoy, M. Harrison Researcher  
Parello FrancescoFrancesco, Parello Researcher  
Lead JamieJamie, Lead Researcher  

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