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Bioaccumulation Characteristics of Typical Perfluoroalkyl Compounds in Alfalfa Under Salt Stress
Bull Environ Contam Toxicol. 2024 Jan 5;112(1):24. doi: 10.1007/s00128-023-03850-1.ABSTRACTMedicago sativa, commonly known as alfalfa, is widely distributed worldwide, known for its strong stress resistance and well-developed root system, making it an important plant in ecological restoration research. To investigate the absorption and transport characteristics of alfalfa for typical perfluoroalkyl substances (PFAS) under salt stress, a 30-day indoor greenhouse experiment was conducted. The results showed that alfalfa exhibited varying degrees of absorption and transport for the selected PFAS. The highest BCF (Bioconcentra...
Source: Bulletin of Environmental Contamination and Toxicology - January 5, 2024 Category: Environmental Health Authors: Zhengwei Li Yue Zhi Wei Li Jiamin Lei Zhiqiang Huang Haoran Li Shenhua Qian Source Type: research

Microplastic Abundance and Sources in Surface Water Samples of the Vaal River, South Africa
In this study, MPs with a minimum size of 0.055 mm in surface water of the Vaal River, South Africa, were reported. MPs were 100% prevalent, with a mean numerical abundance of 0.68 ± 0.64 particles/m3. Small-sized MPs of < 1 mm accounted for the largest proportion. MPs were chemically identified as high-density polyethylene, low-density polyethylene, and polypropylene according to their Raman spectra. The prevalence of fragments (41.6%) and fibers (38.5%) over pellets (8.1%) indicates that microplastics are from secondary sources. The prevalence of polyethylene and polypropylene is consistent with microplastics being f...
Source: Bulletin of Environmental Contamination and Toxicology - January 5, 2024 Category: Environmental Health Authors: Dalia Saad Gibbon Ramaremisa Michelle Ndlovu Patricia Chauke Josiane Nikiema Luke Chimuka Source Type: research

Survival of Nutrient-Starved Diatoms Under Ocean Acidification: Perspective from Nutrient Sensing, Cadmium Detection, and Nitrogen Assimilation
This study aimed to explore how OA affects the diatom dynamics under nutrient-poor conditions and the ability of diatoms to perceive nutrients (nitrogen, phosphorus, silicon, and trace metals) and cadmium (Cd) stimuli and assimilate nitrogen when receiving nutrients or Cd supplementation. Our study observed that diatom population grown under OA condition declined faster than those grown under ambient condition. Ocean acidification greatly lower intracellular Ca2+ concentration in diatom cells. Intracellular Ca2+ burst was involved in phosphorus accumulation but not in nitrogen, silicon, essential metals, and cadmium uptake...
Source: Bulletin of Environmental Contamination and Toxicology - December 27, 2023 Category: Environmental Health Authors: Zhen Zhang Ke Pan Hongbin Liu Source Type: research

Strategy for Remediation of Polychlorinated Biphenyls-Contaminated Soil Through Redox Management Based on Electronegativity of the Contaminants
In this study, the use of methanol as electron donor with cow dung as the general microbial inoculum resulted in high specific rate of degradation (0.0542-0.0637 /day) for high-chlorinated biphenyls. The % removal of PCBs ranged between 67.7 and 71.7%. It may be the first study on the application of methanol as a cheap electron donor for PCBs biodegradation without bioaugmentation with specifically selected microorganisms.PMID:38151599 | DOI:10.1007/s00128-023-03847-w (Source: Bulletin of Environmental Contamination and Toxicology)
Source: Bulletin of Environmental Contamination and Toxicology - December 27, 2023 Category: Environmental Health Authors: S Subramani Ankita Bagde Aniket Balke Tapan Chakrabarti Amit Bafana Source Type: research