The geographical distribution of hexabromocyclododecane (HBCD) was investigated through analysis of muscle tissue of skipjack tuna (Katsuwonus pelamis) collected from offshore waters of Asia-Pacific region (Japan, Taiwan, Philippines, Indonesia, Seychelles, Brazil, Japan Sea, East China Sea, South China Sea, Indian Ocean and North Pacific Ocean). HBCD was detected in almost all samples analyzed (<0.1 to 45 ng/g lipid weight basis), indicating widespread presence of this compound in the marine environment. Elevated concentrations of HBCD were found in skipjack tuna from areas around Japan, which have the larger modern industrial/urban societies, and implicated these areas as primary regional sources. All three individual HBCD isomers (alpha-, gamma- and beta-HBCD) were detected in almost all samples; the percentage contribution of the alpha-isomer to total HBCD increased with increasing latitude. The estimated empirical 1/2 distance for alpha-HBCD was 8500 km, which is one of the highest atmospheric transportability among various halogenated persistent organic pollutants (POPs).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.envpol.2005.12.024 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Occurrence and distribution of brominated and fluorinated persistent organic pollutants in surface sediments focusing on industrially affected rivers.
Chemosphere
January 2025
Department of Civil and Environmental Engineering, Pusan National University, Busan 46241, Republic of Korea; Institute for Environment and Energy, Pusan National University, Busan, 46241, Republic of Korea. Electronic address:
Article Synopsis
- The study focused on legacy persistent organic pollutants like PBDEs, HBCDs, and PFAS found in sediments from five major rivers, revealing higher contamination levels in areas with industrial activity.
- The predominant compounds detected were decaBDE for PBDEs, γ-HBCD for HBCDs, and PFOS for PFAS, with alternative substances appearing less frequently.
- Overall, while most ecological risk assessment values were low, PBDEs and PFOS posed significant risks at certain sites, indicating a need for ongoing monitoring to protect aquatic ecosystems.
Interpretation of machine learning-based prediction models and functional metagenomic approach to identify critical genes in HBCD degradation.
J Hazard Mater
December 2024
Institute of Information Science, Academia Sinica, No. 128, Section 2, Academia Road, Nankang, Taipei 11529, Taiwan; Institute of Fisheries Science, National Taiwan University, No. 1, Section 4, Roosevelt Rd., Taipei 10617, Taiwan. Electronic address:
Hexabromocyclododecane (HBCD) poses significant environmental risks, and identifying HBCD-degrading microbes and their enzymatic mechanisms is challenging due to the complexity of microbial interactions and metabolic pathways. This study aimed to identify critical genes involved in HBCD biodegradation through two approaches: functional annotation of metagenomes and the interpretation of machine learning-based prediction models. Our functional analysis revealed a rich metabolic potential in Chiang Chun soil (CCS) metagenomes, particularly in carbohydrate metabolism.
View Article and Find Full Text PDFOccurrence and risk of microplastics and hexabromocyclododecane in urban drinking water systems: From source water to tap water.
Sci Total Environ
January 2025
State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. Electronic address:
The widespread presence of microplastics (MPs) in drinking water systems and their risk of releasing additives have caused widespread concern. However, current research on the migration and risks of MPs and additives in the complete drinking water supply chain remains inadequate. In this study, micro-Raman spectrometer was used to track the entire transport process of MPs from the water source to the tap water, with concentrations ranging from 805 to 4960 items/L, and polyethylene and Polyethylene terephthalate were dominant.
View Article and Find Full Text PDF[Progress in the Study of Occurrence, Distribution, Material Flows, and Environmental Release of Substances of Very High Concern （SVHCs） in Plastics].
Huan Jing Ke Xue
December 2024
State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
Plastic additives provide plastics with excellent functions such as plasticizing, flame retardant, and antioxidant properties and are widely used in various plastics. Of these, 189 plastic additives have been included in the European Union's Candidate List of substances of very high concern （SVHCs） due to their potential environmental and health risks. These SVHCs are mainly used in PVC, PUR, and PE plastics and in the packaging, automotive, construction, electronic and electrical equipment, and textile sectors.
View Article and Find Full Text PDFEfficient photodegradation of hexabromocyclododecane leached from polystyrene by biochar and sulfur doped CuO nanocomposite: Optimization factors, kinetics, and photoactivity.
Environ Pollut
October 2023
Department of Chemistry, Dr. B R Ambedkar National Institute of Technology Jalandhar, Jalandhar, Punjab, 144008, India. Electronic address:
Article Synopsis
- The study explores the effective degradation of hexabromocyclododecane (HBCD), a harmful pollutant, using a biochar and sulfur-doped copper oxide (S-CuO) nanocomposite created through eco-friendly synthesis methods.
- The BC@S-CuO nanocomposite demonstrated the highest photocatalytic activity, achieving 92% degradation of HBCD in 120 minutes, with optimal conditions found at specific pH levels and catalyst loading amounts.
- The research highlights the potential for BC@S-CuO to be reused multiple times, along with its implications for pollution control, especially concerning the leaching of HBCD from expanded polystyrene materials.
Want 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!