What does this research mean for the field?

Banned organochlorine pesticides, particularly HCH and cyclodienes, remain persistent and highly bioavailable in South Indian riverine and estuarine ecosystems, with the bivalve Crassostrea madrasensis demonstrating the highest bioaccumulation capacity. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the occurrence, environmental partitioning, and bioaccumulation patterns of organochlorine pesticides across water, sediment, and three bivalve species in estuarine and riverine ecosystems.

September 2, 2026Environmental Forensics

Occurrence and Distribution of Organochlorine Pesticides in the Water, Sediment and Bivalves from the Estuarine and Riverine Ecosystem of South India

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Authors

PMP. A. Shibini Mol ECEldhose Cheriyan SAS. Aishwarya

Discussion

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Overview

Environmental survey reveals persistent organochlorine pesticide contamination across aquatic matrices and bivalves, highlighting ongoing risks from agricultural runoff.

Key Points

To evaluate the occurrence, environmental partitioning, and bioaccumulation patterns of organochlorine pesticides across water, sediment, and three bivalve species in estuarine and riverine ecosystems.
Quantified residues of organochlorine pesticides (including HCH isomers, cyclodienes, and DDTs) in water, sediment, and bivalves (Crassostrea madrasensis, Meretrix casta, and Villorita cyprinoides) using gas chromatography.
Assessed chemical partitioning and inter-species bioaccumulation using bioconcentration factors (BCF), biota-sediment accumulation factors (BSAF), and principal component analysis (PCA).
Riverine sites showed consistently higher organochlorine pesticide burdens than estuarine sites, with ΣHCH and cyclodienes dominating all sampled matrices.
Crassostrea madrasensis exhibited the highest retention of lipophilic contaminants, while sediment acted as the primary long-term sink for DDTs.

Cite This Study

Mol et al. (2026) studied this question.

synapsesocial.com/papers/6a97e2f6c562ede874ec76de https://doi.org/10.1080/15275922.2026.2722933

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September 2, 2026Environmental Forensics

Occurrence and Distribution of Organochlorine Pesticides in the Water, Sediment and Bivalves from the Estuarine and Riverine Ecosystem of South India

View Full Paper

Ask AI

Bookmark

Authors

PMP. A. Shibini Mol ECEldhose Cheriyan SAS. Aishwarya

Discussion

Member takes

Overview

Environmental survey reveals persistent organochlorine pesticide contamination across aquatic matrices and bivalves, highlighting ongoing risks from agricultural runoff.

Key Points

To evaluate the occurrence, environmental partitioning, and bioaccumulation patterns of organochlorine pesticides across water, sediment, and three bivalve species in estuarine and riverine ecosystems.
Quantified residues of organochlorine pesticides (including HCH isomers, cyclodienes, and DDTs) in water, sediment, and bivalves (Crassostrea madrasensis, Meretrix casta, and Villorita cyprinoides) using gas chromatography.
Assessed chemical partitioning and inter-species bioaccumulation using bioconcentration factors (BCF), biota-sediment accumulation factors (BSAF), and principal component analysis (PCA).
Riverine sites showed consistently higher organochlorine pesticide burdens than estuarine sites, with ΣHCH and cyclodienes dominating all sampled matrices.
Crassostrea madrasensis exhibited the highest retention of lipophilic contaminants, while sediment acted as the primary long-term sink for DDTs.

Cite This Study

Mol et al. (2026) studied this question.

synapsesocial.com/papers/6a97e2f6c562ede874ec76de https://doi.org/10.1080/15275922.2026.2722933

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