کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1168452 960590 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of two experimental speciation methods with a theoretical approach to monitor free and labile Cd fractions in soil solutions
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Comparison of two experimental speciation methods with a theoretical approach to monitor free and labile Cd fractions in soil solutions
چکیده انگلیسی

This work focused on the suitability of two techniques to monitor cadmium speciation in soil solutions collected during a 7-day incubation of a contaminated soil. Anodic stripping voltammetry (ASV) and ion exchange were performed on soil solutions collected daily and results were compared with calculations obtained with the speciation software Visual MINTEQ. The electrochemically labile Cd fraction was greater than the exchange-estimated free Cd fraction during the first 6 days, after which it decreased sharply during the last 2 days to reach values close to the exchange-estimated free Cd fraction. Further investigations showed that the increase in pH was mainly responsible for the reduction. However, calculations performed with Visual MINTEQ software clearly demonstrated that a change in the nature of organic matter and/or its complexing capacity also needed to be taken into consideration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 648, Issue 2, 26 August 2009, Pages 157–161
نویسندگان
, , , , , , ,