AIR CONCENTRATION OF ENDOSULFAN IN CHINA: COMPARING MODELING TO MONITORING RESULTS

摘要

Concentrations of endosulfan (including α-, β-isomer) in air are reported from 92 sites (70 for rural and 22 for urban) across China in 2005. The mean concentration (pg/m3) was 192 and ranged from 3 to 1545. High concentrations in some urban sites indicating possible strong sources of endosulfan near these cities, most likely on the vegetable land. Endosulfan air concentration inventories in China from 1995 to 2004 with 1/4°× 1/6° longitude and latitude resolution by using Simplified Gridded Emission and Residue Model (SGERM) have been developed in our group. The measured air concentration data for α- and β-endosulfan at the monitoring sites for 2005 were compared to their corresponding modeled concentration data for 2004 and a good consistence was found. First, one-way analysis (ANOVA) was made to address the possible difference between monitoring and modeling data for both α- and β-endosulfan respectively, and the results show that, at the 0.05 level, no significantly differences were found between them. Secondly, regression analysis between the monitoring and modeled data indicated the good correlations with R = 0.95 for β-endosulfan and a weak correlation with R = 0.45 for α-endosulfan.