Spatiotemporal partition dynamics of typical herbicides at a turbid river estuary

Guo, Zewei; Ouyang, Wei; Tulcan, Roberto Xavier Supe; Lin, Chunye; He, Mengchang; Wang, Baodong; Xin, Ming

doi:10.1016/j.marpolbul.2022.113946

Cited by 8 publications

(3 citation statements)

References 62 publications

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“…The average atrazine level before the implementation of the policy was 259 ng/L, which decreased to 105 ng/L thereafter. As well as in the YRW from 2014 to 2019, the average concentration decreased from 154.8 ng/L to 99.1 ng/L 15 .…”

Section: Discussionmentioning

confidence: 95%

“…From 2016 to 2019, a further 390,000 tons reduction was observed. Correspondingly, eld monitoring campaigns in China have demonstrated decreased concentrations of pesticides in some rivers 15,16 . Although the pesticide reduction policy mitigates diffuse pollution, ignoring the long-term precipitation effects may overestimate the actual efforts to discharge loads, which should be addressed by conducting long-term exploration to ll in the gaps.…”

Section: Introductionmentioning

confidence: 99%

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Increasing precipitation deteriorates the progress of pesticide reduction policy: a case study in the Yellow River

Ouyang,

Guo,

Chen

et al. 2023

Preprint

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Precipitation variation profoundly affects agricultural development and increases the diffuse pollution risk, which may weaken the positive effects of pesticide reduction policy. This study aimed to analyze the response of pesticide discharge loads in the largest vulnerable watershed to pesticide application intensity and precipitation variance before and after implementing the pesticide reduction policy. We integrated empirical models, field observation and statistics to explore the sensitive factors of the typical pesticide atrazine before and after the pesticide reduction policy in the Yellow River Watershed. The results showed that the implementation of pesticide reduction policy effectively decreased the discharge load of atrazine within the watershed annually. In addition, the most sensitive factor of atrazine discharge loads shifted from precipitation to the atrazine application intensity after implementing the pesticide reduction policy. However, the discharge loads of atrazine significantly increased in an unusual high precipitation year after implementing the pesticide reduction policy.

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Increasing precipitation deteriorates the progress of pesticide reduction policy: a case study in the Yellow River

Ouyang,

Guo,

Chen

et al. 2023

Preprint

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“…Population and human activities, influenced by resources, climate, and strategic locations, have increased in multiple coastal areas worldwide. Over time, the pressure on these settlements has increased and diminished the ecosystem’s health in different places with the emission of contaminants, such as metals or organic pollutants. , Vanadium is a widely distributed trace element, with researchers frequently labeling it as a ubiquitous element. The average vanadium concentration in the upper continental crust is estimated to be around 97 μg g –1 .…”

Section: Introductionmentioning

confidence: 99%

Sediment Flux, Coastal Development, and Industrial Pressure Drive the Historical Vanadium Concentrations in the East China Sea and Two Bays of Shandong

Supe Tulcan,

Ouyang,

Guo

et al. 2023

ACS EST Water

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Vanadium is a versatile element gaining significant interest due to its distribution, concentrations, accumulation, and risks. Its historical evolution in bays with substantial human populations and industrial development that use vanadium-related products is essential to evaluate environmental pollution events and the pressure on natural ecosystems. Vanadium concentrations in four sediment cores from Jiaozhou Bay (JZB), Laizhou Bay (LZB), and the East China Sea (ECS) were analyzed using inductively coupled plasma optical emission spectrometry. Vanadium was higher in the open sea than in a semienclosed bay; the highest concentrations were found in the ECS (98.01–131.70 μg g–1), followed by LZB (66.35–104.33 μg g–1) and JZB (34.95–75.58 μg g–1). Vanadium concentrations in LZB and ECS showed drastic fluctuations and followed trends similar to those of sediment fluxes caused by anthropogenic activities and the natural courses of the two largest rivers in China, the Yangtze River and the Yellow River. Despite higher concentrations of vanadium in the ECS and LZB, the pollution indices indicated uncontaminated to low-contaminated habitats. Conversely, vanadium concentrations in the JZB illustrate the significant impacts of industries and coastal development, principally after the 1980s. Likewise, the high enrichment and pollution indices suggest that vanadium emission, migration, and circulation of JZB occur at concentrations beyond its natural threshold..

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Gold nanoclusters-based fluorescence sensor array for herbicides qualitative and quantitative analysis

Zhang,

Hu,

Wang

et al. 2024

Analytica Chimica Acta

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Spatiotemporal partition dynamics of typical herbicides at a turbid river estuary

Cited by 8 publications

References 62 publications

Increasing precipitation deteriorates the progress of pesticide reduction policy: a case study in the Yellow River

Increasing precipitation deteriorates the progress of pesticide reduction policy: a case study in the Yellow River

Sediment Flux, Coastal Development, and Industrial Pressure Drive the Historical Vanadium Concentrations in the East China Sea and Two Bays of Shandong

Gold nanoclusters-based fluorescence sensor array for herbicides qualitative and quantitative analysis

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