کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6306755 1618821 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chemical speciation of cadmium: An approach to evaluate plant-available cadmium in Ecuadorian soils under cacao production
ترجمه فارسی عنوان
فرمول شیمیایی کادمیم: رویکردی برای بررسی کادمیوم موجود در گیاه در خاک اکوادور تحت تولید کاکائو
کلمات کلیدی
کادمیوم، اکوادور، کاکائو، تقسیم بندی، سی دی موجود، آلودگی خاک،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی
Elevated concentration of cadmium (Cd) in cacao beans has raised serious concerns about the chocolate consumption on human health. Accumulation of Cd in cacao bean in southern Ecuador has been related to soil contamination. In this study, soil fractionation approach was used to identify available Cd pools in the soils and to correlate these Cd pools with bean Cd concentration and soil test indexes. The distribution of soil Cd fractions decreased in the order: oxidizable > acid-soluble > residual > reducible >> water-soluble (+exchangeable). Oxidizable and acid-soluble fractions accounted for 59 and 68% of the total recoverable Cd for the 0-5 and 5-15 cm soil depth, respectively. Acid-soluble fraction was closely related to bean-Cd, with correlation coefficients (r) of 0.70 and 0.81 (P < 0.01) for the 0-5 and 5-15 cm soil depth, respectively. Acid-soluble Cd was significantly correlated with 0.01 M HCl- (r = 0.99, P < 0.01) or Mehlich 3- extractable Cd (r = 0.97, P < 0.01). These results indicate that acid-soluble Cd fraction is an important part of available Cd pool. Since approximately 60% of Cd in the cacao-growing soils is related to the acid-soluble fraction and bound to organic matter, remediation of the contaminated soils should consider to the dynamics of soil pH and organic matter content.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 150, May 2016, Pages 57-62
نویسندگان
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