Seasonal variations and inhalation risk assessment of short-chain chlorinated paraffins in PM2.5 of Jinan, China.
Environ Pollut
; 245: 325-330, 2019 Feb.
Article
em En
| MEDLINE
| ID: mdl-30447475
ABSTRACT
Short-chain chlorinated paraffins (SCCPs) were added to the Stockholm Convention on Persistent Organic Pollutants (POPs) at the eighth meeting of the conference of the parties in 2017. As a consequence, increasing environmental attention and international regulation on SCCPs is expected in the future. Inhalation uptake of particulate matter (PM) was an important exposure pathway for POPs into the human body. In the present study, a total of eighty PM2.5 samples were collected in the four seasons of the year at an urban site (Shandong University, Jinan) in Shandong province to investigate the seasonal changes of SCCPs and their inhalation exposure risks to human health. The concentrations of SCCPs ranged from 9.80 to 105â¯ngâ¯m-3, with the mean value of 38.7â¯ngâ¯m-3. The highest concentrations of SCCPs were detected in winter, while the lowest concentrations were in summer. SCCPs concentrations were positively correlated with the mass concentrations of PM2.5 (râ¯=â¯0.629, pâ¯<â¯0.01), and negatively correlated with the ambient temperature (râ¯=â¯-0.447, pâ¯<â¯0.01). The SCCPs congeners with 10 carbon atoms (C10 congeners) and 7 chlorine numbers (Cl7 congeners) were the predominant congeners, which contributed 35% and 37% of the total SCCPs contamination, respectively. The average inhalation exposure was estimated to be 1.75â¯×â¯10-4â¯mgâ¯kg-1 day-1 for adults, which is much lower than the "no observed adverse effect level" (NOAEL) of 100â¯mgâ¯kg-1 day-1 given by European risk assessment for SCCPs.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
2_ODS3
Base de dados:
MEDLINE
Assunto principal:
Parafina
/
Estações do Ano
/
Monitoramento Ambiental
/
Exposição por Inalação
/
Material Particulado
/
Hidrocarbonetos Clorados
Tipo de estudo:
Etiology_studies
/
Risk_factors_studies
Limite:
Humans
País/Região como assunto:
Asia
Idioma:
En
Revista:
Environ Pollut
Ano de publicação:
2019
Tipo de documento:
Article