The relative importance of different environmental fate processes for hexachlorobenzene (HCB) can be estimated from measured and estimated values of several physical properties and chemical kinetic and equilibrium constants. Photolysis of HCB in water and hexane is slow, while hydrolysis, oxidation and biotransformation appear to be unimportant. HCB will sorb strongly to soil and sediment but will be rapidly volatilized from water into the atmosphere, where slow photolysis is the dominant loss process.
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J Contam Hydrol
January 2025
Hebei Key Laboratory of Crop Stress Biology, Hebei Normal University of Science and Technology, Qinhuangdao 066000, China.
Livestock manure, a common fertilizer in Chinese agriculture, can lead to environmental contamination and potential health risks due to elevated antibiotic and phosphorus levels. Importantly, the high phosphorus levels initiates transformations of phosphate minerals in soils, especially calcareous soils. These variations in phosphate mineralogy can significantly impact the migration and fate of antibiotics within the soil.
View Article and Find Full Text PDFMar Environ Res
January 2025
Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, China; Laboratory for Marine Geology, Qingdao Marine Science and Technology Center, Qingdao, 266237, China. Electronic address:
Mangrove wetlands are strategic locations for mitigating climate changes. In order to address the harm of rapid climate change to mangrove ecosystems, it is necessary to scientifically predict the fate of mangrove ecosystems, which can be achieved by reconstructing the development history of mangrove forests. This study analyzes the contribution of mangrove-derived organic matter (CMOM) from sediment core F in Phang Nga Province, Thailand by using the endmember mixing model based on stable organic carbon isotopes (δC) and C/N (molar) ratio.
View Article and Find Full Text PDFEnviron Sci Technol
January 2025
U.S. Environmental Protection Agency, E205-02, Research Triangle Park, P.O. Box 12055, Durham, North Carolina 27711, United States.
The complex, varied composition (i.e., rubbers/elastomers, carbon black, fillers, additives, and embedded road materials) and wide density range of tire road wear particles (TRWPs) present challenges for their isolation and identification from environmental matrices.
View Article and Find Full Text PDFEnviron Sci Process Impacts
January 2025
Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, Parsons Laboratory, 15 Vassar Street, Cambridge, Massachusetts 02139, USA.
The high salinity and organic content in oil and gas wastewaters can cause ion suppression during liquid chromatography mass spectrometry (LC/MS) analysis, diminishing the sensitivity and accuracy of measurements in available methods. This suppression is severe for low molecular weight organic compounds such as ethanolamines (, monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), -methyldiethanolamine (MDEA), and ,-ethyldiethanolamine (EDEA)). Here, we deployed solid phase extraction (SPE), mixed-mode LC, triple quadrupole MS with positive electrospray ionization (ESI), and a suite of stable isotope standards (, one per target compound) to correct for ion suppression by salts and organic matter, SPE losses, and instrument variability.
View Article and Find Full Text PDFEnviron Res
January 2025
Departamento de Bioloxía Vexetal e Ciencias do Solo, Área de Edafoloxía e Química Agrícola, Facultade de Ciencias, Universidade de Vigo, As Lagoas s/n, Ourense, 32004, Spain; Instituto de Agroecoloxía e Alimentación (IAA), Campus Auga, Universidade de Vigo, Ourense, 32004, Spain; Comunidades Microbianas de suelos (id. UA 1678), MBG-CSIC/ Universidad de Vigo, Unidad asociada al CSIC, Spain.
The overuse of pesticides in agriculture has led to widespread pollution of soils and water resources, becoming a problem of great concern. Nowadays, special attention is given to neonicotinoids, particularly acetamiprid, the only neonicotinoid insecticide allowed for outdoor use in the European Union. Once acetamiprid reaches the soil, adsorption/desorption is the main process determining its bioavailability and environmental fate.
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