University of Belgrade, Vinča Institute of Nuclear Sciences - National Institute of Thе Republic of Serbia, POB 522, 11001, Belgrade, Serbia.
University of Belgrade, Vinča Institute of Nuclear Sciences - National Institute of Thе Republic of Serbia, POB 522, 11001, Belgrade, Serbia.
Environ Pollut. 2020 Nov;266(Pt 3):115282. doi: 10.1016/j.envpol.2020.115282. Epub 2020 Aug 9.
The comparison of fly ash generated from lignite combustion in a thermal power plant Kolubara A (Veliki Crljeni) and bottom and fly ash from coal waste combustion in a semi-industrial fluidized bed boiler (Vinča) was performed as the function of particle size. The average total concentrations of the 16 EPA priority PAHs in ash fractions are 0.49 mg kg of ash (thermal power plant) and 17.48 mg kg of ash (fluidized bed boiler). The sum of 3- and 4-ring PAHs accounts for more than 93% of overall PAHs concentration, and the most abundant among them is fluoranthene. The portions of PAHs groups defined based on their physico-chemical properties, as obtained from quantitative structure-activity relationship (QSAR) models included in the Vega platform, were determined. These portions, emission factors, and benzo[a]pyrene equivalence concentrations were further on used to estimate the potential environmental impact of ash disposal. The PAHs emission factors are higher compared to values in the air pollutant emission inventory guidebook of the cooperative program for monitoring and evaluation of the long-range transmission of air pollutants in Europe (EMEP/EEA). The overall emission factors of 16 PAHs for combustion of lignite and coal waste are determined to be 0.15 and 249.97 mg kg of fuel, respectively. Based on the ratios of benzo[a]pyrene equivalence concentrations of each ash and correspondent fuel, the disposal of fly ash from the cyclone of fluidized bed boiler represents the highest risk to the environment among tested ashes.
对来自 Kolubara A（Veliki Crljeni）热电厂褐煤燃烧产生的飞灰以及半工业流化床锅炉（Vinča）中煤矸石燃烧产生的底灰和飞灰进行了粒度分布的比较。灰分中 16 种 EPA 优先多环芳烃的平均总浓度分别为 0.49mg/kg 灰分（热电厂）和 17.48mg/kg 灰分（流化床锅炉）。3 环和 4 环多环芳烃的总和占多环芳烃总浓度的 93%以上，其中最丰富的是荧蒽。根据定量结构-活性关系（QSAR）模型中包含的 Vega 平台确定了基于理化性质定义的多环芳烃组部分、排放因子和苯并[a]芘当量浓度。这些部分、排放因子和苯并[a]芘当量浓度进一步用于估计灰分处置的潜在环境影响。与欧洲监测和评估长距离空气污染物传输合作计划（EMEP/EEA）空气污染物排放清单指南中的值相比，多环芳烃的排放因子更高。褐煤和煤矸石燃烧 16 种多环芳烃的总排放因子分别确定为 0.15 和 249.97mg/kg 燃料。根据每个灰分和对应燃料的苯并[a]芘当量浓度比值，流化床锅炉旋风除尘器飞灰的处置对环境构成的风险最高。
