Polychlorinated biphenyls in fly ashes collected from five coal-fired power plants in North China

International Conference on Energy Engineering and Environmental Protection 2016

能源学;生态环境科学

Li, Zhiyong^1 ; Li, Xu^1 ; Ma, Huiqiao^1 ; Fan, Lin^1

School of Environmental Science and Engineering, North China Electric Power University, Baoding

071000, China^1

关键词: AS-soils;    Coal fly ash;    Coal-fired power plant;    Mean values;    North China;    PCB congeners;    Soil quality;    TEQ concentration;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/52/1/012054/pdf
DOI  :  10.1088/1742-6596/52/1/012054

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The 5 coal fly ash samples (CFA) were systematically collected from 5 coal-fired power plants (CFPPs) in North China for analysis of 86 PCB congeners. The predominant PCB congeners were PCB-6, -4/10, -28, -18, -19 and -16/32, which belonged to lighter molecular weight (LMW) congeners. The Σ86PCBs for 5 CFPPs ranged from 10.93 to 32.06 ng/g with the mean value as 16.01 ng/g. The PCBs in CFA were dominated by LMW-PCBs with 2-, 3- and 4-Cl PCBs contributed 34.80%, 39.18% and 9.21% to the Σ86PCBs. The TEQ concentrations for 5 CFPPs was 42.54 pg/g higher than 4 pg/g designed by Canada for soil quality, indicated the using of CFA as soil amendment should be cautioned.