【摘要】 对2003-11采自北京东南郊化工区的土壤、植物样品中11种氯苯类有机物进行了分析测定.结果表明,土壤(干重)中氯苯类有机物(CBs)的总量范围为0.232~51.15 ng.g-1,均值为18.16 ng.g-1,其中1,2-DCB、1,4-DCB和HCB分别占45.2%、15.3%和17.1%;植物(干重)中CBs的总量范围为5.635~31.99 ng.g-1,均值为12.36 ng.g-1,其中1,4-DCB和HCB分别占51.5%和14.9%.土壤中∑CBs与土壤有机质含量的皮尔森(Pearson)相关系数为0.544(p≤0.05),呈弱正相关关系.此外,除1,4-DCB和1,2,4-TCB外,云杉针叶中CBs的土壤-植物富集因子(BCFs)随CBs挥发能力[lg(VP/KOW)的增强而降低,随CBs辛醇/空气分配系数(KOA)的增大而升高.更多还原

【Abstract】 Eleven chlorobenzenes（except MCB of a total of 12 in the congener series,CBs） in soil and plant samples collected from Beijing southeast chemical industry zone were analyzed.The range of total chlorobenzenes was 0.232～51.15(ng·g^-1) in soil（dry weight）,among which 1,2-DCB,1,4-DCB and HCB occupy 45.2%,15.3% and 17.1% respectively;while 5.635～31.99(ng·g^-1) in plants（dry weight）,among which 1,4-DCB and HCB occupy 51.5% and 14.9%.Total CBs concentrations in soil were positive related with soil organic matter（r=0.544,p≤0.05）.Soil-to-spruce needle bioconcentration factors（BCFs） of CBs were calculated and their relationships with CBs’ physicochemical properties were investigated.Except for 1,4-DCB and 1,2,4-TCB,the CB BCF into spruce needle generally decreased with increasing volatilization potential [lg(V_P/K_OW)],and increased with increasing K_OA.更多还原