Surface sediment samples at 4 sites along an offshore transect from outer continental shelf off the Pearl River estuary to the shelf slope region of the northern South China Sea, have been analyzed for total organic carbon (TOC), total nitrogen (TN), solvent extractable organic matter (EOM) and non-aromatic hydrocarbons. TOC, TN and EOM show distinct spatial variations. Their highest values are all recorded at the shelf slope region. EOM varies from 18.70-38.58 microgg(-1) dry sediment and accounts for 0.20-0.72% of the TOC contents. The non-aromatic hydrocarbons are an important fraction of EOM. Their contents range from 3.43-7.06 microgg(-1) dry sediment. n-Alkanes with carbon number ranging from 15-38 are identified. They derive from both biogenic and petrogenic sources in different proportions. Results of isoprenoid hydrocarbons, hopanes and steranes also suggest possible petroleum contamination.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.envpol.2006.11.001 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Isolation of a Novel Bacterium Isolate Capable of Utilizing Crude Oil and Diesel Oil Spills as a Biological Bioremediation Agent.
Front Biosci (Elite Ed)
October 2024
Department of Environmental Biotechnology, Biotechnology Research Center, Al-Nahrain University, 10018 Baghdad, Iraq.
Background: Contamination with crude oil and hydrocarbons has become a global threat. Such threats have urged us to invent solutions to deal with this dilemma. However, chemical treatment comes with limited benefits.
View Article and Find Full Text PDFAn exploratory study of volatile and semi-volatile organic compounds in PM atmospheric particles from an outdoor environment in Brazil.
Environ Sci Pollut Res Int
January 2025
Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, Belo Horizonte, MG, 6627, 370901, Brazil.
The development of methods for determining volatile and semi-volatile organic compounds in public spaces has become necessary to identify potential health and environmental risks. This study presents a practical methodology for sampling, extracting, detecting, and identifying these compounds in a vehicular traffic region in Belo Horizonte, Brazil. The methodology uses direct-immersion solid phase microextraction (DI-SPME) and static headspace (SHS) to extract SVOCs/VOCs.
View Article and Find Full Text PDFFrom loose to tight: unveiling bond stretch isomerism in π-complexes of Li, Na and K.
Phys Chem Chem Phys
October 2024
Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala, 695019, India.
The study investigates the phenomenon of bond stretch isomerism (BSI) in complexes formed between alkali metals (Li, Na, K) and various non-aromatic, aromatic hydrocarbons, as well as heteroaromatic systems. The research employs density functional theory (DFT) calculations to optimize complex geometries and analyze their electronic structures using molecular electrostatic potential (MESP), charge, and spin density analyses. The results reveal that these complexes can exist in two distinct configurations: 'loose' long-bond isomers (lbi) that retain the original hydrocarbon geometry and 'tight' short-bond isomers (sbi) that undergo geometrical distortion upon complexation, with sbi generally being more stable.
View Article and Find Full Text PDFTranscriptional regulation of the anaerobic 3-hydroxybenzoate degradation pathway in Aromatoleum sp. CIB.
Microbiol Res
November 2024
Department of Microbial and Plant Biotechnology, Centro de Investigaciones Biológicas Margarita Salas-CSIC, Madrid, Spain. Electronic address:
Phenolic compounds are commonly found in anoxic environments, where they serve as both carbon and energy sources for certain anaerobic bacteria. The anaerobic breakdown of m-cresol, catechol, and certain lignin-derived compounds yields the central intermediate 3-hydroxybenzoate/3-hydroxybenzoyl-CoA. In this study, we have characterized the transcription and regulation of the hbd genes responsible for the anaerobic degradation of 3-hydroxybenzoate in the β-proteobacterium Aromatoleum sp.
View Article and Find Full Text PDFStructural investigation of the complexation between vitamin B12 and per- and polyfluoroalkyl substances: Insights into degradation using density functional theory.
Chemosphere
September 2024
Environmental Laboratory, US Army Engineer Research and Development Center, 3909 Halls Ferry Road, Vicksburg, MS, 39180, United States. Electronic address:
Environmental remediation of per- and polyfluoroalkyl substances (PFAS) has become a significant research topic in recent years due to the fact that these materials are omnipresent, resistant to degradation and thus environmentally persistent. Unfortunately, they have also been shown to cause health concerns. PFAS are widely used in industrial applications and consumer products.
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!