IJESD 2022 Vol.13(3): 70-76 ISSN: 2010-0264
doi: 10.18178/ijesd.2022.13.3.1374
doi: 10.18178/ijesd.2022.13.3.1374
Ecological Risk Assessment for Heavy Metals Occurrence in Rice Cultivation Areas in An Giang Province, Vietnam
Nguyen Thanh Giao
Abstract—The study was conducted to assess the occurrence
and ecological risk of heavy metal concentrations (Cu, Zn, Pb,
Cd and As) in the soil of paddy fields in An Giang province in
2020. Soil samples were collected at 112 locations in seven
paddy fields. Cluster analysis (CA) was used to present the
spatial distribution of heavy metals. Ecological potential risk
index (RI) was used to determine risk levels caused by heavy
metals. The results showed that Cu, Zn, Pb and As in all soil
samples ranging from 1.83-124.04, 4.87-114.18, 7.87-39.22 and
4.66-16.32 mg/kg, respectively. Cd was not detected in the soil
samples. All heavy metal values were within the allowable limits
of Vietnamese technical regulation on heavy metals in the soils.
However, Cu concentration at the rice area in An Hoa hamlet,
Khanh An commune, An Phu district (D10) and As
concentration at D11 (An Hoa hamlet, Khanh An commune),
D33 & D36 (Hoa Ha hamlet, Kien An commune, Cho Moi
district) and D38 (Phu Thuong 2 hamlet, Kien Thanh commune,
Cho Moi district) exceeded the allowable limits. The CA results
revealed that soil quality at 112 study sites was classified into 12
soil quality groups, possibly reducing the soil monitoring cost by
72.32%. As is the most significant contributor to potential
ecological risks in soils, although RI values still showed that
heavy metals pose a low risk in rice cultivation areas. However,
heavy metals in soils could degrade soil quality, accumulate in
agricultural commodities, and eventually humans through the
food chain. Therefore, the frequency of the monitoring can be
considered to increase to two or three times per year to evaluate
the seasonal variation of the heavy metals.
Index Terms—An Giang, rice farming, heavy metals, potential ecological risk.
N. T. Giao is with College of Environment and Natural Resources, Can Tho University, Can Tho 900000, Vietnam (e-mail: ntgiao@ctu.edu.vn).
Index Terms—An Giang, rice farming, heavy metals, potential ecological risk.
N. T. Giao is with College of Environment and Natural Resources, Can Tho University, Can Tho 900000, Vietnam (e-mail: ntgiao@ctu.edu.vn).
Cite: Nguyen Thanh Giao, "Ecological Risk Assessment for Heavy Metals Occurrence in Rice Cultivation Areas in An Giang Province, Vietnam," International Journal of Environmental Science and Development vol. 13, no. 3, pp. 70-76, 2022.
Copyright © 2022 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).General Information
- ISSN: 2010-0264 (Print); 2972-3698 (Online)
- Abbreviated Title: Int. J. Environ. Sci. Dev.
- Frequency: Bimonthly
- DOI: 10.18178/IJESD
- Editor-in-Chief: Prof. Richard Haynes
- Managing Editor: Ms. Cherry L. Chen
- Indexing: Scopus (CiteScore 2022: 1.4), Google Scholar, CNKI, ProQuest, EBSCO, etc.
- E-mail: ijesd@ejournal.net
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