Recognition of odor pollutants in the soil of a pesticide factory site in south China
Due to a lack of investigation protocols and estimation standards,nowadays,investigation of odor pollution of pollutant sites is very difficult in China.Aiming at investigating the odor pollution condition of a pesticide factory site in South China,a technical route is proposed to select the odor pollutants of a pesticide factory site,through production processes analysis and pre-sampling analysis.The selection standards of odor pollutants were suggested.Based on preliminary pollution recognition,the pre-sampling of soil and underground water were carried out,and a total of 15 soil samples and five underground water samples were collected.Because the groundwater level in this site was high,it was difficult to set up a soil gas monitoring well,thus the soil gas was sampled in an off-line way,which means the deep soil samples were collected in gas bags,where soil gas evaporated for 30 min and was sampled.Results showed that the odor pollutants selected from production processes analysis,soil,and soil gas sampling,and analysis were 21,31 and 12,respectively,with a sum of 40 kinds.Furthermore.Two kinds of odor pollutants were selected from the investigation results of a nearby site.As a result,42 kinds of chemicals were recognized as the odor constituents of concern,including five kinds of benzenes,ten hydrocarbons,five sulfides,three alcohols,two aldehydes,one of ketone,three chloralkanes,and four amines and others.The main odor-polluted area includes the phosmet workshop,the chloroacetic acid workshop,the drain pipe,and the surroundings.Besides,the odor pollutants in the clay were higher than those of other layers,which should be focused on in later investigations.The approach and methods proposed in this study could be a reference for odor investigation of pesticide factory sites and other similar contaminated sites.
NETL
NSTL
万方数据
维普
