AI Article Synopsis
- - The study investigated the levels and sources of polycyclic aromatic hydrocarbons (PAHs) in sediment samples from fifteen freshwater fishponds and six mariculture rafts in the Pearl River Delta, revealing total PAH concentrations from 52.7 to 717 ng g(-1), with an average of 184 ng g(-1).
- - Marine sediments had significantly higher PAH levels, particularly high molecular weight and carcinogenic PAHs, compared to freshwater sediments.
- - Principal component analysis showed that PAHs in freshwater sediments mainly came from the combustion of coal, wood, and vehicle emissions, while vehicle emissions and coal combustion were predominant sources in marine sediments.
Article Abstract
The distribution and source apportionment of polycyclic aromatic hydrocarbons (PAHs) in surface sediments of freshwater fishponds and mariculture rafts around the Pearl River Delta (PRD) were investigated. Twenty-one sample sites were chosen, consisting of fifteen freshwater fishponds and six mariculture rafts. The total PAH ( summation SigmaPAH) concentrations measured in all the sediment samples ranged from 52.7 to 717 ng g(-1), with mean of 184 ng g(-1). The marine sediment samples contained higher levels of summation SigmaPAH, high molecular weight (HMW) PAHs and carcinogenic PAHs than freshwater sediments (p<0.05). Principal component analysis/multiple linear regression analysis (PCA/MLRA) indicated that the source of PAHs in freshwater sediment was mainly derived from mixed combustion of coal, wood, and vehicle emission (66.2%). Vehicle emissions and coal combustion were the main sources (52.5 and 47.5% of summation SigmaPAH, respectively) of PAHs contaminated in the marine sediments. The present study indicated that surface sediments of freshwater fishponds and mariculture rafts around the PRD were grossly contaminated by PAHs derived from combustion sources.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ecoenv.2010.04.010 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effects of compound immobilized bacteria on remediation and bacterial community of PAHs-contaminated soil.
J Hazard Mater
December 2024
MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China.
Immobilized microorganism technology is expected to enhance microbial activity and stability and is considered an effective technique for removing soil polycyclic aromatic hydrocarbons (PAHs). However, there are limited high-efficiency and stable bacterial preparations available. In this study, alkali-modified biochar (Na@CBC700) was used as the adsorption carrier, sodium alginate (SA) and polyvinyl alcohol (PVA) as embedding agents, and CaCl as the cross-linking agent to prepare immobilized Acinetobacter (CoIMB) through a composite immobilization method.
View Article and Find Full Text PDFSuperwettable recycled polyethylene terephthalate/cobalt zeolitic imidazolate framework membrane for extraction of polycyclic aromatic hydrocarbons from water samples.
Talanta
December 2024
Department of Chemistry, Lorestan University, Khoramabad, Iran.
A significant challenge in membrane production is the need for affordable materials that provide high efficiency for their designated applications. Employing recycled materials in membrane manufacturing is viewed as a promising solution to tackle this challenge. In this work, a superwettable polyethylene terephthalate membrane modified with cobalt zeolitic imidazolate framework (PET/Co ZIF) is prepared for the first time from recycled plastic mineral water bottles and used to extract polycyclic aromatic hydrocarbons (PAHs) from aqueous samples followed by high-performance liquid chromatography with UV detection (HPLC-UV).
View Article and Find Full Text PDFHyaluronic Acid-Modified and Doxorubicin-Loaded Au Nanorings for Dual-Responsive and Dual-Imaging Guided Targeted Synergistic Photothermal Chemotherapy Against Pancreatic Carcinoma.
Int J Nanomedicine
December 2024
Department of Surgery, The Second Affiliated Hospital of Jiaxing University, Jiaxing, 314000, People's Republic of China.
Introduction: Pancreatic carcinoma (PC) is a highly malignant digestive tumor. Nanotechnology-based minimally invasive techniques have been proposed to provide a new opportunity for PC treatment.
Methods: A minimally invasive nanoplatform (named HA/DOX-AuNRs) is fabricated by HA modifying and DOX loading Au nanorings (AuNR).
Extraction of polycyclic aromatic hydrocarbons (PAHs) from surface soils of East Kolkata wetland, India, and its distribution, sources, and risk assessment.
Mar Pollut Bull
December 2024
Department of Chemical Engineering, Jadavpur University, Kolkata 700032, India. Electronic address:
The East Kolkata wetland (EKW) in West Bengal, India is a Ramsar site and has ecological importance to the city. The booming urbanization history of Kolkata city causes increase in concentration of persistent air pollutants like polycyclic aromatic hydrocarbons (PAHs) which got adsorbed eventually in the wetland soil due to their hydrophobicity and lipophilicity. Therefore, current study aims to investigate PAHs pollution level along with associated ecological health risk and optimization of PAHs extraction to develop standard analysis protocol.
View Article and Find Full Text PDFAnalysis of PAHs content, source identification and ecological risk assessment in surface sediments from the Caspian Sea.
Mar Pollut Bull
December 2024
Iranian National Institute for Oceanography and Atmospheric Science (INIOAS), Tehran, Iran. Electronic address:
The concentrations of Polycyclic Aromatic Hydrocarbons (PAHs) in surface sediments were investigated in the southern Caspian Sea. The results revealed that the total PAHs in sediments varied from 6.53 to 170.
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!