【摘要】 通过对鞍山市典型区域(6个污染源、4个居住区、一个对照点)土壤及大气中有机氯农药(organochlorine pesicides,OCPs)的监测,利用逸度及逸度模型的相关概念计算鞍山市有机氯农药类污染物土-气交换的迁移方向及交换通量。OCPs土-气交换现状表明,土壤仍是OCPs主要储存地。各点位检出有机氯农药组分数据为83个,土-气交换通量范围在-28.4~1518 g/(km2·月)之间,其中污染物由空气相向土壤相迁移占比9.6%,其余均呈现由土壤相向空气相迁移;对照点千山只检出两种污染物,通量值只有3.37 g/(km2·月);各点位污染物中,3种六六六(HCHs)交换通量占比最大,占总交换量的43%~95%。更多还原

【Abstract】 By monitoring organochlorine pesticides(OCPs) in the soil and air of the typical regions of Anshan City(6 pollution sources, 4 residential areas, and 1 control point), migration orientation and exchange fluxes of OCPs soil-air exchange was calculated by use of fugacity-based model. The current status of COPs soil-air exchange showed that soil was still the main place for OCPs storage. 83 data of COPs composition was obtained and the range of soil-air exchange fluxes was between-28.4 and 1518 g/(km2 ·month). Migration from the air to the soil accounted for 9.6% and the rest was presented by migration from the soil to the air. With regard to the control point at Qian Mountain, only two pollutants were detected out with the fluxes of 3.37(g/km 2·month). Among the pollutants in each monitoring point, proportion of the exchange fluxes of 3 kinds of HCHs was the largest, accounting for 43% to 95% of the total.更多还原