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Ecological Risk of Heavy Metals and a Metalloid in Agricultural Soils in Tarkwa, Ghana

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Title: Ecological Risk of Heavy Metals and a Metalloid in Agricultural Soils in Tarkwa, Ghana
Authors: Bortey-Sam, Nesta Browse this author
Nakayama, Shouta M. M. Browse this author →KAKEN DB
Akoto, Osei Browse this author
Ikenaka, Yoshinori Browse this author →KAKEN DB
Baidoo, Elvis Browse this author
Mizukawa, Hazuki Browse this author →KAKEN DB
Ishizuka, Mayumi Browse this author →KAKEN DB
Keywords: heavy metals
agricultural soil
integrated pollution
ecological risk
Issue Date: Sep-2015
Publisher: MDPI
Journal Title: International Journal of Environmental Research and Public Health
Volume: 12
Issue: 9
Start Page: 11448
End Page: 11465
Publisher DOI: 10.3390/ijerph120911448
Abstract: Heavy metals and a metalloid in agricultural soils in 19 communities in Tarkwa were analyzed to assess the potential ecological risk. A total of 147 soil samples were collected in June, 2012 and analyzed for As, Cd, Co, Cr, Cu, Hg, Ni, Pb and Zn. Mean concentrations (mg/kg dw) of heavy metals in the communities decreased in order of Zn (39) ˃ Cr (21) ˃ Pb (7.2) ˃ Cu (6.2) ˃ As (4.4) ˃ Ni (3.7) ˃ Co (1.8) ˃ Hg (0.32) ˃ Cd (0.050). Correlations among heavy metals and soil properties indicated that soil organic matter could have substantial influence on the total contents of these metals in soil. From the results, integrated pollution (Cdeg) in some communities such as, Wangarakrom (11), Badukrom (13) and T-Tamso (17) indicated high pollution with toxic metals, especially from As and Hg. Potential ecological risk (RI) indices indicated low (Mile 7) to high risks (Wangarakrom; Badukrom) of metals. Based on pollution coefficient (C(i)f), Cdeg, monomial ecological risk (E(i)r) and RI, the investigated soils fall within low to high contamination and risk of heavy metals to the ecological system especially plants, soil invertebrates and/or mammalian wildlife. This represented moderate potential ecological risk in the study area, and mining activities have played a significant role.
Type: article
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 石塚 真由美

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