Tracing the attenuation of fipronil and its transformation products from a rice paddy field to receiving rivers using polar organic chemical integrative samplers

Xiong, Jingjing; Li, Huizhen; Ma, Xue; Tan, Baoxiang; Gong, Yongting; Xie, Danping; Wang, Li; Yi, Hao; You, Jing

doi:10.1016/j.scitotenv.2023.166824

Cited by 1 publication

(2 citation statements)

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“…Regarding pesticides, the PYB showed extremely high levels of legacy OCPs (162 ± 113 ng/g dry wt), reflecting severe historical residue issues. The detection of persistent OCPs in PYB sediment was reasonable given the long history of agricultural practices in this region . Conversely, CUPs were frequently detected in sediments at all locations, but OP and pyrethroid concentrations in the PYB were significantly lower than those in the other two regions.…”

Section: Resultsmentioning

confidence: 60%

“…Despite Poyang Lake being a nature reserve with a relatively low population density and anthropogenic impacts compared to the PRB and THB, the survival of organisms in the PYB was surprisingly low. This could be due to residual pesticides from agricultural practices, which are highly toxic to nontarget aquatic organisms. , Overall, the lowest survival rates for Chinese rare minnows and Asian clams were observed in the PRB and the PYB, respectively. The inconsistent lethal effects between the two species across different regions can be attributed to their distinct living habitat (fish in water and clams in sediment) and the different composition of pollutants in environmental compartments …”

Section: Resultsmentioning

confidence: 96%

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Evidence from In Situ Bioassays and Suspect Analysis Revealed the Region-Specific Aquatic Risk across Socioeconomic Gradients in China

Tong,

Li,

Pei

et al. 2024

Environ. Health

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Various contaminants are present in aquatic environment and pose potential threats to pelagic and benthic organisms, calling for effective risk assessment. Traditional risk assessments based on target analysis are useful when the principal contaminants responsible for ecological risk are known; however, these approaches become challenging when dealing with chemical mixtures. In addition, the compositions of chemical mixtures often differ in regions with different levels of socioeconomic development, requiring risk assessment methods that are applicable under different pollution scenarios. Herein, in situ bioassays were conducted with two native species, Chinese rare minnows (Gobiocypris rarus) and Asian clams (Corbicula f luminea), in economically developed watersheds in China (Pearl River Basin (PRB) and Taihu Lake Basin (THB)) and agriculture-dominated Poyang Lake Basin (PYB). Significant lethal and sublethal effects (e.g., neurotoxicity, reproductive toxicity, and metabolic and oxidative stress) were observed in fish and clams irrespective of economic gradients. Notably, ecological effects differed significantly between water and sediment phases within the same region. Target (98 contaminants) and suspect screening (942 contaminants) revealed regional-specific characteristics. Ecological risk assessments using a weight of evidence approach demonstrated that both water and sediment in the PRB were at moderate to high risk, as was the sediment in the less developed PYB. However, the characteristics of mixture pollution varied greatly among regions. Suspect screening identified many pollutants that are not regularly monitored but are present at high environmental concentrations and are linked to local industrial production. These distinct mixture risk characteristics across different basins suggest that mitigating aquatic pollution requires region-specific management measures.

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Section: Resultsmentioning

confidence: 60%