Pollution characteristics and source identification of PAHs in urban runoff from different surfaces

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Abstract

Runoff samples from residential road, parking lot, junction area, roof and main transport road were collected in a typical rain event in summer in Wenzhou. Pollution characteristics of PAHs were investigated in urban runoff samples from different surfaces. PAH sources were analyzed using factor analysis and multiple regression analysis. The results showed that PAHs in runoff from main transport road and parking lot could be flushed more easily in the initial runoff with a higher rain intensity. Partition coefficients decreased with the TSS contents, which could be related with the particles size distribution patterns in the runoff samples. PAHs sources were mainly the incomplete combustion of coal, oil, etc., oil leakage and coking, and the contribution of each source was different in runoff from different surfaces. The specific values of BaA/CHR were mostly above 0.6, which exhibited that the main sources of PAHs were local pollution. In addition, aerial deposition had a certain contribution to PAHs because BaA/CHR ratios were relatively lower in the initial runoff.

Original languageEnglish
Pages (from-to)503-510
Number of pages8
JournalHuanjing Kexue Xuebao / Acta Scientiae Circumstantiae
Volume33
Issue number2
StatePublished - Feb 2013

Keywords

  • PAHs
  • Pollution characteristic
  • Runoff
  • Source identification
  • Surface

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