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This is a Quantitative Study study.

September 19, 2025Open Access

Integrated assessment of heavy metal pollution: Bioaccumulation in the river snail Filopaludina martensi, sediment, and water from the Mae Kha Canal, Chiang Mai province, Thailand

Key Points

High concentrations of cadmium and lead were found in sediment, water, and river snails, particularly during the wet season.
Principal component analysis revealed significant correlations between heavy metals and snail populations impacted by seasonal variations.
The snails showed notably high lead concentrations, exceeding safe consumption thresholds, suggesting risks to human health.
Anthropogenic activities contributed to the poor health conditions of river ecosystems, emphasizing the need for pollution management.

Abstract

Abstract Cadmium (Cd) and lead (Pb) tend to bioaccumulate in freshwater environments, making them major hazards to environmental health. This study aimed to determine the content of the heavy metals Cd and Pb in field sediment, water, and whole tissues of the edible river snail Filopaludina martensi, which could serve as bioindicators for these metals. Principal component analysis (PCA), Permutational multivariate analysis of variance (PERMANOVA), and Pearson correlation coefficients (r) showed that heavy metals and snail populations are greatly impacted by seasonal variations (p F. martensi is a reliable bioindicator of the ecological integrity of the Mae Kha Canal. Evidence of biological degradation and ongoing metal contamination in the canal emphasizes the value of using these snails for pollution monitoring and directing pollution management efforts to maintain aquatic ecosystems and public health.

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