Assessment of As and Cd contamination in topsoils of Northern Ghorveh (Western Iran): role of parent material, land use and soil properties

The aim of this study was to investigate the influences of land use, parent materials (rock types) and soil properties on total arsenic and cadmium concentrations in the agricultural soils. A total of 87 surface (0–20 cm) soil samples were collected from four types of land use: irrigated farming, ra...

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Bibliographic Details
Published in:Environmental earth sciences 2011-11, Vol.64 (5), p.1203-1213
Main Authors: Karimi Nezhad, Mohammad Tahsin, Ghahroudi Tali, Manijeh, Hashemi Mahmoudi, Mohammad, Pazira, Ebrahim
Format: Article
Language:English
Subjects:
Agricultural land
Arsenic
Biogeosciences
Cadmium
Cation exchange
Dryland farming
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Environmental Science and Engineering
Exact sciences and technology
Geochemistry
Geology
Hydrology/Water Resources
Irrigated farming
Land use
Organic matter
Original Article
Pollution index
Pollution levels
Pollution, environment geology
Rangelands
Soil and rock geochemistry
Soil contamination
Soil pollution
Soil properties
Soil sciences
Soils
Surficial geology
Terrestrial Pollution
Topsoil
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Summary:The aim of this study was to investigate the influences of land use, parent materials (rock types) and soil properties on total arsenic and cadmium concentrations in the agricultural soils. A total of 87 surface (0–20 cm) soil samples were collected from four types of land use: irrigated farming, rangeland, dry farming and orchard. The average concentrations of the analyzed elements in topsoil were 84.426 mg As/kg and 3.289 mg Cd/kg. In addition, the pH, organic matter (OM), cation exchange capacity (CEC), soil grain sizes and CaCO 3 were measured for each sample. The results indicated that land use had no significant effect on As and Cd concentrations. Our findings indicated that the Cd concentrations were influenced by bedrock composition, but for As there were no significant differences between various soil parent materials (bedrocks). Soil pollution was assessed on the basis of pollution index (PI), comprehensive pollution index (P n ) and geoaccumulation index ( I geo ). Calculated indices showed high-pollution levels for As and low- to moderate-pollution levels for Cd.
ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-011-0935-x