17α-Ethinylestradiol (EE2), the potent estrogen which forms the basic constituent of the contraceptive pill, can undergo degradation in natural waters by sunlight and via secondary reactions initiated by photo-excited dissolved organic matter. The current paper presents the findings of an investigation into the irradiation process of EE2 when dissolved in natural waters. This investigation was carried out under simulated sunlight in samples of sea, river and distilled water at a 17α-ethinylestradiol concentration of 300ngL(-1). Several notes of significance may be made on the basis of these results. Firstly, an enhancement of the degradation, observed in the presence of co-absorbing dissolved organic matter, was shown to be proportional to the absorbance of the sample. Secondly, the kinetics of the process obtained during this investigation were within the range of previously reported findings, despite the fact that significantly higher concentrations of EE2 were used in earlier studies. Finally, the environmental half-life times for 17α-ethynyloestradiol, calculated from the results of the experiments, were found to be one and two days in the top layer of river and sea water respectively.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chemosphere.2014.03.062 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Plant growth strategies and microbial contributions to ecosystem nitrogen retention along a soil acidification gradient.
Ecology
January 2025
School of Life Sciences, Hebei University, Baoding, China.
Nitrogen (N) retention is a critical ecosystem function associated with sustainable N supply. Lack of experimental evidence limits our understanding of how grassland N retention can vary with soil acidification. A N-labeling experiment was conducted for 2 years to quantify N retention by soil pathways and plant functional groups across a soil-acidification gradient in a meadow.
View Article and Find Full Text PDFLinkage Microenvironment Modulation in Triazine-Based Covalent Organic Frameworks for Enhanced Photocatalytic Hydrogen Peroxide Production.
Small
January 2025
Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China.
Covalent organic frameworks (COFs), known for the precise tunability of molecular structures, hold significant promise for photocatalytic hydrogen peroxide (HO) production. Herein, by systematically altering the quinoline (QN) linkages in triazine (TA)-based COFs via the multi-component reactions, six R-QN-TA-COFs are synthesized with identical skeletons but different substituents. The fine-tuning of the optoelectronic properties and local microenvironment of COFs is allowed, thereby optimizing charge separation and improving interactions with dissolved oxygen.
View Article and Find Full Text PDFDissolved phosphorous through dry-wet-dry transitions in a small-dammed river basin: integrated understanding on transport patterns, export controls, and fate.
Environ Sci Process Impacts
January 2025
State Key Laboratory for Ecological Security of Regions and Cities, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
An integrated understanding of dissolved phosphorous (DP) export mechanism and controls on export over dry and wet periods is crucial for riverine ecological restorations in dammed river basins considering its high bioavailability and retention rates at dams. Riverine DP transport patterns (composition, sources, and transport pathways), export controls, and fate were investigated over the 2020 wet season (5 events) and dry seasons before and after it (2 events: dry and dry) in a semi-arid, small-dammed watershed to comprehend the links between terrestrial DP sources and aquatic DP sinks. Close spatiotemporal monitoring of the full range of phosphorous and total suspended solids (TSSs) and subsequent analyses (hysteresis, hierarchical partitioning, and coefficient of variation) provided the basis for the study.
View Article and Find Full Text PDFOrganic manure and fertilizer N management strategies improve soil health at different growth stages of pearl millet under pearl millet-wheat sequence.
BMC Plant Biol
January 2025
Colorado Water Center, Colorado State University, Fort Collins, CO, USA.
Background: Incorporating organic manure improves soil properties and crop productivity. A long-term study started in October 1967 examined the effects of farmyard manure and nitrogen fertilization on the soil at key growth stages of pearl millet in a pearl millet-wheat cropping system over its 51st cycle.
Results: Applying 15 Mg of farmyard manure (FYM) per hectare in both growing seasons significantly boosted soil organic carbon (SOC), dissolved organic carbon (DOC), and key nutrients compared to one-season application.
Sediment management in integrated aquaculture-agriculture systems: Sustainable use of fish culture sludge for organic fertilization of Terminalia arjuna.
Environ Sci Pollut Res Int
January 2025
Animal Production Department, Faculty of Agriculture, Cairo University, Giza, Egypt.
Aquaculture systems generate large amounts of sludge that represent serious environmental threats if discharged directly into local ecosystems. However, this nutrient-rich sediment can contribute to nutrient cycling by being applied as an organic fertilizer to ornamental medicinal trees during their early growth stages. To investigate the potential advantages of using recirculating aquaculture system sludge (RASS) and biofloc technology sludge (BFTS) as organic fertilization alternatives to chemical fertilization, a pot trial was conducted at the Faculty of Agriculture, Cairo University, Egypt.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!