University of Hertfordshire

From the same journal

By the same authors

  • J Zhang
  • R Li
  • X Zhang
  • Y. Bai
  • Pan Cao
  • P. Hua
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Original languageEnglish
Number of pages9
Pages (from-to)1314-1322
JournalScience of the Total Environment
Journal publication date1 Feb 2019
Volume649
Early online date30 Aug 2018
DOIs
Publication statusPublished - 1 Feb 2019

Abstract

This study focuses on the source apportionments of polycyclic aromatic hydrocarbons (PAHs) in road dust (RD) with four size fractions through three receptor models of principal component analysis with multiple linear regression (PCA-MLR), positive matrix factorization (PMF) and Unmix. The concentrations of total PAHs range from 0.45 to 2.03 μg g−1. Results show that the concentrations of PAHs increased with a decreasing size fraction. Similar potential sources to PAHs in RD were extracted by three models with a little difference in numbers and percent load contributions of each identified sources. The overall proportion of the identified sources were ranked as vehicular emission > coke oven > surface pavement > others in each size fractions. In terms of risk assessment, the mean values of incremental lifetime cancer risk (ILCR) of the total cancer risk of PAHs in RD were lower than the baseline value of an acceptable risk. However, PAHs in smaller size fraction prone to have a higher adverse effect on children via ingestion. Furthermore, the ecological risk assessment of hazard quotients and mean hazard quotients indicated that PAHs in RD had a 9% probability of being toxic to the benthic organisms and aquatic environment.

ID: 15279658