福州市道路灰尘中多环芳烃粒径分布、生物可利用度及其毒性当量
Distribution,bioaccessability and toxicity equivalence of polycyclic aromatic hydrocarbons in different particle-size fractions of road dust in Fuzhou
马晓丽 1何雨恒 1张辉 1王子淳 1魏然 2倪进治2
作者信息
- 1. 福建师范大学地理科学学院、碳中和未来技术学院,福州,350108
- 2. 福建师范大学地理科学学院、碳中和未来技术学院,福州,350108;福建师范大学,福建省湿润亚热带生态地理过程教育部重点实验室,福州,350108
- 折叠
摘要
以福州道路灰尘为研究对象,研究了不同粒径灰尘(＞250 μm、250-53 μm和＜53 μm)中多环芳烃(PAHs)的含量和组成,并利用体外消化模型结合固相萃取技术评估了不同粒径灰尘中PAHs的生物可利用度以及有效态PAHs的苯并(a)芘(BaP)毒性当量浓度(TEQBaP).结果表明,(1)不同粒径灰尘中 PAHs 总量随粒径减小而增加(＞250 μm,0.597 mg·kg-1;250-53 μm,1.235 mg·kg-1;＜53 μm,3.931 mg·kg-1).不同粒径灰尘中PAHs组成基本相同,都为4环(58.5％±0.8％)＞5环(21.5％±0.4％)＞3 环(13.3％±0.9％)＞6 环(4.8％±0.2％)＞2 环(2.0％±0.3％);(2)不同粒径灰尘中有效态 PAHs 总量随粒径减小而增加,但＞250 μm粒径灰尘中PAHs的生物可利用度显著高于250-53 μm和＜53 μm粒径灰尘(P＜0.05).总体上,低环(2环、3环和4环)PAHs生物可利用度要大于高环(5环和6环)PAHs;(3)不同粒径灰尘中有效态PAHs的总TEQBaP值随粒径减小而增大,且不同粒径灰尘中4环和5环PAHs的TEQBaP值都显著高于其他环数PAHs(P＜0.05).由于不同粒径灰尘中4环PAHs含量都最高,且其具有较高的生物可利用度和TEQBaP值,因而在人体内潜在毒性风险最高.
Abstract
The content and composition of polycyclic aromatic hydrocarbons(PAHs)in different particle-size fractions(＞250 μm,250-53 μm and＜53 μm)of the road dust from Fuzhou city were studied.Moreover,the bioaccessability of PAHs and the toxic equivalent concentration based on the toxicity of benzo(a)pyrene(BaP)(TEQBaP)of the bioavailable PAHs in different particle-size fractions of the dust were evaluated by an in vitro digestion model combined with solid phase extraction technique.The results showed that:(1)the total contents of PAHs in different particle-size fractions of the dust increased with the decrease of particle size(＞250 μm,0.597 mg·kg-1;250-53 μm,1.235 mg·kg-1;＜53 μm,3.931 mg·kg-1).The compositions of PAHs in different particle-size fractions of the dust were basically the same,all of which were in the sequence of 4-ring(58.5％±0.8％)＞5-ring(21.5％±0.4％)＞3-ring(13.3％±0.9％)＞6-ring(4.8％±0.2％)＞2-ring(2.0％±0.3％);(2)The total contents of the bioavailable PAHs in different particle-size fractions of the dust increased with the decrease of particle size,but the bioaccessability of PAHs was significantly higher in the＞250 μm dust than in the 250-53 μm and＜53 μm dust(P＜0.05).Overall,the bioaccessability of low-ring(2-,3-,and 4-ring)PAHs was greater than that of high-ring(5-,6-ring)PAHs;(3)The total TEQBaP value of the bioavailable PAHs in different particle-size fractions of the dust increased with the decrease of particle size,and the TEQBaP values of 4-ring and 5-ring PAHs in different particle-size fractions of the dust were significantly higher than those of other ring number PAHs(P＜0.05).The 4-ring PAH content was the highest in different particle-size fractions of the dust and they also had high bioaccessability and TEQBaP values,thus their potentially toxic risk in human was the highest.
关键词
多环芳烃/组成/粒径/体外消化模型/生物可利用度/毒性当量Key words
polycyclic aromatic hydrocarbons/composition/particle size/in vitro digestion models/bioaccessability/toxicity equivalent引用本文复制引用
基金项目
福建省自然科学基金(2020J01189)
福建省自然科学基金(2020J01140)
出版年
2024
NETL
NSTL
万方数据