摘要
文章建立了PCA源解析和PCDDs/PCDFs比值相结合的源解析方法,对我国福建省某工业园区生活垃圾焚烧厂(MSWI)周围的环境空气和土壤中四氯~八氯代二恶英(2,3,7,8-PCDD/Fs)含量和分布特征进行了分析,结果表明,在环境空气和土壤中PCDD/Fs含量变化范围分别为0.437 4~0.936 4 pg/m^3(0.033~0.046 pg ITEQ/m^3)和265.53~598.07 ng/kg(1.424~2.231 ng I-TEQ/kg).此外,土壤样品中08CDD单体在PCDD/Fs中的贡献率变化范围为93.18%~97.51%.分别采用PCA源解析和环境空气、土壤中PCDDs/PCDFs比值分析,结果均说明K4点外不受热源影响,其他取样点都受到热源的影响.最后计算17种单体的逸度值分析PCDD/Fs在土壤和环境空气中传递情况,得出了PCDD/Fs净含量由环境空气传递到土壤中的重要结论.
The paper sets up a new method for sources analysis of PCDD/Fs by combining PCA and the ratio of PCDDs/PCDFs,it analyzed the concentrations and distribution characteristics of four chlorine～ eight chlorine of dioxin in ambient air and soil around a municipal solid waste incinerator（MSWI） in an industrial area.The result showed that the range of PCDD/Fs in ambient air and soil samples were 0.43741-TEQ/kg）.In addition,the rate of contribution of O_8CDD in PCDD/Fs was ～ 0.9364 pg/m3（0.033～0.046 pg I-TEQ/m3） and 265.53 ～ 598.07 ng/kg（1.424～2.231 ng 93.18%～97.51%）.It showed that all sampling points were affected by the heat sources except K4 by PCA source and the PCDDs/PCDFs ratio analysis.Finally,it analyzed air-soil exchange by calculating the values of fugacity in 17 kinds of congeners,the result suggested that net flux from ambient air to soil.
出处
《新疆大学学报（自然科学版）》
CAS
北大核心
2016年第2期192-197,共6页
Journal of Xinjiang University(Natural Science Edition)
基金
国家自然科学基金项目(81402626
81172707
81302382)
