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Environmental fate and aquatic risk assessment of oxyfluorfen in California rice fields.
Integr Environ Assess Manag
January 2025
Department of Environmental Toxicology, College of Agricultural and Environmental Sciences, University of California, Davis, CA, United States.
The herbicide oxyfluorfen [OXY; 2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene] recently emerged as a potential solution to combat herbicide resistance in California rice. Proposed as a preemergent applied preflood to soil, products are in development for use with OXY-tolerant rice strains. Currently, OXY is not registered for use with rice and its use in or near aquatic resources is restricted due to its high aquatic toxicity.
View Article and Find Full Text PDFRetention and migration of microplastics in stepped paddy fields: A study on microplastic dynamics in the special irrigation system.
Environ Res
January 2025
College of Water Resources & Civil Engineering, Hunan Agricultural University, Changsha, 410128, China.
The stepped paddy fields (SPFs) are important for food security and sustainable development. The unique spatial structure and complex hydrological processes in this system make it difficult to understand the migration of pollutants. In this study, microplastic pollution was investigated in the water and soil from Ziquejie SPFs, China.
View Article and Find Full Text PDFEstimation of macroplastic yield from river basin to coastal area: A case study of the Klang River, Malaysia.
Mar Pollut Bull
January 2025
Water Quality Laboratory, National Water Research Institute of Malaysia (NAHRIM), Lot 5377, Jalan Putra Permai, Rizab Melayu Sungai Kuyoh, 43300 Seri Kembangan, Selangor, Malaysia.
Plastic pollution in aquatic ecosystems has become a critical global environmental challenge, threatening biodiversity, water quality, and human health. This study investigates macroplastics distribution and characterization in the highly polluted Klang River, Malaysia, and proposes a protocol to compute total macroplastic yield in the river basin. A total of 240 macroplastic items were collected over a 20-km stretch from the river mouth inland, with an average of 0.
View Article and Find Full Text PDFMicroplastic occurrence and hydrodynamic-sedimentary driving effects in the Bohai Strait region of China.
Sci Total Environ
January 2025
Key Laboratory of Analytical Technology Development and Offshore Eco-Environment Conservation, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China.
Article Synopsis
- The study investigates the presence and distribution of microplastics in the Bohai Strait, revealing varying abundances in seawater and sediments, with levels between 0.38 and 3.20 items/L and 15.80 to 94.41 items/kg d.w., respectively.
- The research finds that microplastic abundance is greater in areas with slower ocean currents, indicating that these currents significantly impact their distribution and sedimentation.
- The types of microplastics found in seawater also affect those in sediments, highlighting the crucial role of seawater in the transport and eventual deposition of microplastics, thus providing insights for tackling microplastic pollution.
Polyester fibres slowly degrade in marine sediments.
Mar Pollut Bull
December 2024
Institute of Marine Science, University of Auckland, Private Bag 92019, Auckland, New Zealand.
Microplastics are everywhere, including marine sediment. In this study, we evaluated the degradation of polyester, rayon, and cotton sewing threads over nine months when buried in marine sediment in Waitematā Harbour, Auckland, New Zealand. Polyester tensile strength was tested pre- and post-burial to track changes over time.
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