Fate, occurrence, and regional-scale emissions of neonicotinoid pesticides and their metabolites in wastewater treatment plants in suburban Shanghai, China.

ABSTRACT: Neonicotinoid pesticides (NEOs) are emerging contaminants with potential ecological and human health risks. However, their sources, transformation dynamics, and emission pathways in urban wastewater systems remain poorly quantified. This study systematically investigates the spatial distribution, sources, and transformation of 8 parent NEOs (pNEOs) and 6 metabolites (mNEOs) in the influents of 21 wastewater treatment plants (WWTPs) in suburban Shanghai, China. The average concentrations of ΣpNEOs and ΣmNEOs were 568.17 ng/L and 478.20 ng/L, respectively, with significant spatial variations. pNEOs were dominated by nitenpyram (NIT) and dinotefuran (DIN), while mNEOs, such as desnitro-imidacloprid (DN-IMI) and dinotefuran-urea (DIN-U), showed higher abundances. Correlation and cluster analys

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC12907088 | biostudies-literature | 2026 Mar

REPOSITORIES: biostudies-literature