کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5770024 1629194 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Metals in topsoil in Larsemann Hills, an ice-free area in East Antarctica: Lithological and anthropogenic inputs
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Metals in topsoil in Larsemann Hills, an ice-free area in East Antarctica: Lithological and anthropogenic inputs
چکیده انگلیسی


- Metals, TOC and TN in topsoils of an ice-free area of East Antarctica were determined.
- Elevated Pb was found in soils inside station areas.
- Impacts of local human activities on soil metals are generally negligible.
- Marine inputs and long-range pollutant transport are less influential on soil metals.

Although metal accumulation has been investigated in coastal Antarctic soil, the information about to what extent station activities influence soil quality remains limited, especially in East Antarctica. Here, we carried out an investigation on element accumulation (Pb, Zn, Cu, Ni, Mn, Cr, Ti, Zr, Fe, Ca, K, Al, Mg and Na) in topsoils collected from Larsemann Hills, the second largest oasis along East Antarctica. Results show that metal contents in soils generally fall within the ranges of local rocks, suggesting a dominant source of parent minerals. In spatial, a content gradient of Pb was found, with elevated values inside station areas, while no obvious trend was found for other metals. Contents of total organic carbon (TOC) and nitrogen are rather low, and no association exists between metals and TOC or nitrogen, suggesting a minor role of nutrients in soil metal accumulation in this cold-xeric environment. Chemical weathering assessment suggests a low degree of chemical weathering in topsoils in Larsemann Hills. The results of multivariate statistical analysis suggest that lithological inputs are the dominant source of soil metals, and the different metal groups are likely associated with different geochemistry of elements during weathering process. Among the observed 14 metals, only soil Pb levels was affected by local human activities, but this influence is only confined to inside station areas. The influences of marine inputs and long-range pollutant transport on metal levels in topsoils were found to be negligible.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: CATENA - Volume 160, January 2018, Pages 41-49
نویسندگان
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