北太平洋中途岛环礁土壤中多环芳烃的浓度、来源及风险评估
Concentrations, source and risk assessment of polycyclic aromatic hydrocarbons in soils from midway atoll, north pacific ocean.
作者信息
Yang Yuyi, Woodward Lee Ann, Li Qing X, Wang Jun
机构信息
Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei Province, China.
U.S. Fish and Wildlife Service, Pacific Reefs NWRC, Honolulu, Hawaii, United States of America.
出版信息
PLoS One. 2014 Jan 23;9(1):e86441. doi: 10.1371/journal.pone.0086441. eCollection 2014.
This study was designed to determine concentrations of polycyclic aromatic hydrocarbons (PAHs) in soil samples collected from Midway Atoll and evaluate their potential risks to human health. The total concentrations of 16 PAHs ranged from 3.55 to 3200 µg kg(-1) with a mean concentration of 198 µg kg(-1). Higher molecular weight PAHs (4-6 ring PAHs) dominated the PAH profiles, accounting for 83.3% of total PAH mass. PAH diagnostic ratio analysis indicated that primary sources of PAHs in Midway Atoll could be combustion. The benzo[a]pyrene equivalent concentration (BaPeq) in most of the study area (86.5%) was less than 40 µg kg(-1) BaPeq and total incremental lifetime cancer risks of PAHs ranged from 1.00×10(-10) to 9.20×10(-6) with a median value of 1.24×10(-7), indicating a minor carcinogenic risk of PAHs in Midway Atoll.
本研究旨在测定从中途岛环礁采集的土壤样品中多环芳烃（PAHs）的浓度，并评估其对人类健康的潜在风险。16种多环芳烃的总浓度范围为3.55至3200µg kg⁻¹，平均浓度为198µg kg⁻¹。高分子量多环芳烃（4 - 6环多环芳烃）在多环芳烃谱中占主导地位，占多环芳烃总质量的83.3%。多环芳烃诊断比值分析表明，中途岛环礁多环芳烃的主要来源可能是燃烧。研究区域大部分地区（86.5%）的苯并[a]芘当量浓度（BaPeq）低于40µg kg⁻¹ BaPeq，多环芳烃的终生总增量癌症风险范围为1.00×10⁻¹⁰至9.20×10⁻⁶，中位数为1.24×10⁻⁷，表明中途岛环礁多环芳烃的致癌风险较小。
Zotero 插件