【摘要】 利用逸度模型及其相关算法,研究了东北某钢铁厂及其周围居住区、背景对照区二噁(口英)和多氯联苯污染物土-气迁移方向和交换通量。结果表明,二噁(口英)主要由大气向土壤迁移,其土-气交换通量为每月618～5373mg/km2,多氯联苯污染物主要由土壤向大气迁移,交换通量为每月47～230mg/km2。基于实测污染物的浓度和逸度模型能较好地估算该地区二噁(口英)、多氯联苯等持久性有机污染物的土-气界面迁移规律。更多还原

【Abstract】 The soil-air exchange of PCDD /Fs and PCBs were investigated using fugacity based model from an iron and steel making plant,and the surrounding residential area and background areas,Northeastern China.The PCDD /Fs were found transferred from air to the soil,with an estimated exchange flux of 618 ～ 5373mg /km2 /month.The PCBs were transferred from the soil to air,with an estimated exchange flux of 47 ～ 230mg /km2 /month.The determined concentrations of chemicals and the fugacity based model can be combined together to well estimate the soil-air exchange of PCDD /Fs and PCBs in the local area.更多还原