کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5754533 1620878 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reference values for potentially harmful elements in soils from Atlantic Rainforest, Brazil
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
پیش نمایش صفحه اول مقاله
Reference values for potentially harmful elements in soils from Atlantic Rainforest, Brazil
چکیده انگلیسی


- Pedogenetic Fe oxides had important role in the adsorption of heavy metals in soil.
- Natural baseline values were higher in comparison with other foreign studies.
- Special attention should be given to Sb due to its lower critical environmental level.
- The soil quality reference values for heavy metals must be determined locally.

Soil formation processes and the parent rock lead to differences in potentially harmful elements (heavy metals) contents in soil and sediments distribution patterns. The Brazilian legislation demands that natural baseline values must be defined for each specific environment or each state in the country. In this work natural baseline values of potentially harmful elements (PHE) in soils from Parana's Coast Plain (Atlantic Rainforest) were established and correlations with soil properties were verified. The sampling points were defined by geological and soil maps information crossing. We performed soil fertility, texture and Fe oxides (crystalline and amorphous) analysis. Pseudo-total metal concentrations were obtained by microwave-assisted digestion using the EPA3051A method. There were positive correlations between PHE and clay in the soils. The pedogenetic Fe oxides had important role in the adsorption and maintenance of PHE in soil. Natural baseline values were higher in comparison with other states of Brazil and with other foreign studies. The increase in PHE content in the sandy soils of Coastal Plain was attributed to the heavy flow of vehicles for centuries towards the coast of Paraná state. The background PHE values for Parana's Coast plain from 75 percentiles, in mg kg− 1, were: Ag (0,29); As (4,78); Ba (111,4); Cd (1,02); Co (< 0.17); Cr (48,8); Cu (17,9); Mo (1,44); Ni (17,2); Pb (16,9); Sb (3,12); V (60,2); and Zn (52,5). Special attention should be given to Sb due to its lower critical environmental level. When confronted to other values we confirm the necessity to regional (inside a state) baseline reference values.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Geochemical Exploration - Volume 181, October 2017, Pages 138-147
نویسندگان
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