Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China; Guangdong Engineering Technology Research Center for Photocatalytic Technology Integration and Equipment, Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China; Guangdong Engineering Technology Research Center for Photocatalytic Technology Integration and Equipment, Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
Chemosphere. 2023 Nov;341:139994. doi: 10.1016/j.chemosphere.2023.139994. Epub 2023 Aug 29.
Coking facilities release large quantities of polycyclic aromatic hydrocarbons (PAHs) and their derivatives into the ambient air. Here we examined the profiles, spatial distributions, and potential sources of atmospheric PAHs and their derivatives in an industrial coking plant and its surrounding environment (gaseous and particulate). The mean concentrations of PAHs, nitrated PAHs (NPAHs), chlorinated PAHs (ClPAHs), and brominated PAHs (BrPAHs) in the air of the coking facility were 923, 23.8, 16.7 and 4.25 ng m³, respectively, 1-2 orders of magnitude higher than those in the surrounding area and the control area. Linear regressions between contaminant concentrations and distance from the coking facility suggested that the concentrations of PAHs (r = 0.82, p < 0.05), NPAHs (r = 0.77, p < 0.01), and BrPAHs (r = 0.62, p < 0.01) were negatively correlated with distance. Additionally, the particle-bound fractions of PAHs and their derivatives were significantly correlated with their molecular weights (p < 0.01). Based on the calculation of the gas/particle partitioning coefficients (log K) for PAHs and their derivatives and the corresponding subcooled liquid vapor pressures (log P), the slope values for PAHs, NPAHs, ClPAHs, and BrPAHs ranged from -1 to -0.6, indicating that deposition of PAHs and their derivatives occurred through both adsorption and absorption. Five emissions sources were identified by positive matrix factorization (PMF), including coking emissions, oil pollution, industrial and combustion sources, secondary formation, and traffic emissions, with coking emissions accounting for more than 50% of total emissions. Furthermore, the results of the health risks assessment suggested that atmospheric PAHs and their derivatives in the coke plant and surrounding area negatively impacted human health.
炼焦设施会向环境空气中释放大量多环芳烃（PAHs）及其衍生物。在这里，我们研究了工业炼焦厂及其周围环境（气体和颗粒物）中大气 PAHs 及其衍生物的分布特征、空间分布和潜在来源。炼焦厂空气中 PAHs、硝化多环芳烃（NPAHs）、氯化多环芳烃（ClPAHs）和溴化多环芳烃（BrPAHs）的平均浓度分别为 923、23.8、16.7 和 4.25ng/m³，分别是周围地区和对照区的 1-2 个数量级。污染物浓度与距离炼焦厂的线性回归表明，PAHs（r=0.82，p<0.05）、NPAHs（r=0.77，p<0.01）和 BrPAHs（r=0.62，p<0.01）的浓度与距离呈负相关。此外，PAHs 及其衍生物的颗粒结合部分与它们的分子量呈显著相关（p<0.01）。基于 PAHs 及其衍生物的气/粒分配系数（log K）和相应的亚临界液体蒸气压（log P）的计算，PAHs、NPAHs、ClPAHs 和 BrPAHs 的斜率值在-1 到-0.6 之间，表明 PAHs 及其衍生物的沉积通过吸附和吸收同时发生。通过正定矩阵因子分解（PMF）确定了 5 个排放源，包括炼焦排放、石油污染、工业和燃烧源、二次形成和交通排放，其中炼焦排放占总排放量的 50%以上。此外，健康风险评估的结果表明，炼焦厂及其周围地区的大气 PAHs 及其衍生物对人体健康产生负面影响。
