کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6329556 | 1619776 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mercury concentrations in forest soils and stream waters in northeast and south China
ترجمه فارسی عنوان
غلظت جیوه در خاک های جنگلی و جریان آب در شمال شرقی و جنوب چین
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
Atmospheric deposition of mercury (Hg) is generally higher in China than in North America and Europe. Transport and methylation of Hg deposited in forest ecosystems may cause health risks to humans. We collected water samples from 117 small streams, and soil samples from 25 sites in forested areas in northeast and south China during 2011-2013 to investigate the spatial distribution of Hg. Results showed that Hg concentration in surface soil (0-5 cm in depth) was generally higher in south China (97.8 ± 36.0 μg/kg) than that in the northeast (44.0 ± 14.1 μg/kg). In contrast, the Hg concentration in stream water was higher in northeast China (17.2 ± 11.0 ng/L) than that in the south (6.2 ± 6.4 ng/L). Hg concentrations in surface soil were positively correlated with Hg concentrations in the overlying litter Oe/Oa horizon (r2 = 0.84). Hg concentrations in stream water were positively correlated to DOC (dissolved organic carbon) concentrations (r2 = 0.43) and to the Hg concentration in the litter Oe/Oa horizon (r2 = 0.69). Because the litter Oe/Oa horizon represents Hg accumulated by foliage, the positive correlations indicate that atmospheric Hg deposition was an important factor affecting Hg concentrations in soils and stream water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 496, 15 October 2014, Pages 714-720
Journal: Science of The Total Environment - Volume 496, 15 October 2014, Pages 714-720
نویسندگان
Yao Luo, Lei Duan, Long Wang, Guangyi Xu, Shuxiao Wang, Jiming Hao,