The indoor and outdoor carbonaceous pollution during winter and summer in rural areas of Shaanxi, China

Chong Shu Zhu, Jun Ji Cao*, Chuen-Tinn Tsai, Zhen Xing Shen, Kin Fai Ho, Sui Xin Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Indoor and outdoor concentrations of PM2.5, OC, EC and BC were investigated at three rural sites during the winter of 2007 and the summer of 2008 in Shaanxi, China. The average indoor concentrations of PM2.5, OC, EC and BC were found to be higher in winter (237.2 μg/m3, 61.1 μg/m3, 6.2 μg/m3, and 14.3 μg/m3, respectively) than in summer (99.0 μg/m3, 18.0 μg/m3, 2.8 μg/m3, and 7.4 μg/m3, respectively). The average indoor/outdoor (I/O) ratios for PM2.5 and EC were close to or less than 1.0 and those for OC and BC were above 1.0. The correlation coefficients of PM2.5 and carbon species also indicated that the indoor concentrations of PM2.5 and carbonaceous aerosol were correlated with the corresponding outdoor concentrations. Average OC/EC ratios ranged from 4.6 to 23.6 with an average of 9.1 during winter and from 4.2 to 12.0 with an average of 6.3 during summer. The results of this study showed that the OC and EC concentrations and OC/EC ratios in rural areas were higher than those of an urban area in Xi'an. These findings showed that improving energy efficiency and structure will be very important in reducing emissions in rural areas of Shaanxi.

Original languageEnglish
Pages (from-to)550-558
Number of pages9
JournalAerosol and Air Quality Research
Volume10
Issue number6
DOIs
StatePublished - 1 Jan 2010

Keywords

  • Elemental carbon
  • Organic carbon
  • Rural areas

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