Assessment of Heavy Metal Contamination in Paddy Field Soils: A Case Study in Ranau Valley, Sabah, Malaysia
Date
2025-01-10
Authors
Journal Title
Journal ISSN
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Publisher
E3S Web of Ccnference
Abstract
The weathering of ultrabasic rocks surrounding the Ranau Valley
in Sabah, Malaysia, contributes to the formation of soils with elevated
concentrations of heavy metals. These metals, including Manganese (Mn),
Nickel (Ni), Chromium (Cr), and others, have the potential to disperse into
nearby paddy fields, leading to significant soil contamination. This study
aims to: (a) determine the concentrations of heavy metals in the paddy field
soils of Ranau Valley and (b) map their spatial distribution using Geographic
Information System (GIS) technology. The results revealed that Mn was the
most abundant metal, with concentrations reaching 13,855.67 mg/kg,
followed by Iron (Fe), Ni, Zinc (Zn), and Cr. Several metals, including Mn,
Ni, and Cr, exceeded established soil toxicity thresholds, particularly in
areas influenced by ultrabasic rocks and agricultural practices. Elevated
levels of Copper (Cu), Lead (Pb), Zn, and Cadmium (Cd) were also observed
in regions affected by the use of chemical fertilizers. These findings
highlight the potential risks to agricultural productivity and food safety in
the region, as metals such as cadmium and lead can accumulate in crops,
posing health risks to local populations. To address these concerns,
remediation strategies such as organic amendments and pH adjustments are
recommended. Regular monitoring and sustainable soil management
practices will be essential to safeguard soil health, ensure food security, and
reduce environmental risks in the Ranau Valley.
Description
Keywords
heavy metal, soil pollution
Citation
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