YANG Qili; GUO Ji

（Liaoning Technical University, Fuxin 123000, China）

Abstract: Using GC-MS analysis, n-alkanes composition characteristics and biomarker in sediments from three typical wetlands in Lanzhou City, China were studied. Results show that firstly, there are two main composition styles for n-alkanes from wetland sediments in Lanzhou City, which are unimodal shape with an OEP in high carbon n-alkanes and bimodal shape with OEP in both low and high carbon n-alkanes. Secondly, CPI proxies (including CPI1 and CPI2) analysis suggests thathigh carbon n-alkanes is contributed from trees for landscape and low carbon n-alkanes is resulted of using fossil fuel. Lastly, it is found that Caishichang Wetland and Yintang Wetland Park suffer the similar effects by pollution source. But, the effects on pollution source of Yantang Park show different obviously and it may have a close relation with human activities.

Key words: wetland sediment; biomarker; n-alkane; GC-MS; source analysis

EARTH AND ENVIRONMENT Vol.44, No.4 Tot No.312, 2016, Page 441-446