State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, PR China; School of Environmental Science and Engineering and Key Laboratory of Municipal Solid Waste Recycling Technology and Management of Shenzhen City, Southern University of Science and Technology of China, Shenzhen, 518055, PR China.
Management and Department of Energy and Resource Engineering, College of Engineering, Peking University, Beijing 100871, PR China.
Chemosphere. 2018 Nov;210:247-256. doi: 10.1016/j.chemosphere.2018.06.177. Epub 2018 Jul 5.
The Chinese government is encouraging domestic cement producers to move from traditional coal power sources to the co-processing of waste as the primary energy source for the industry. In this study, 32 samples collected from the soil surrounding a cement plant in Beijing were analyzed for the presence of 16 U.S. EPA priority polycyclic aromatic hydrocarbons (PAHs) and 12 heavy metals. Ten samples were selected for polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) analysis. The pollution distribution patterns, sources, and potential risks to human health and the environment were investigated and evaluated. The highest concentrations of PCDD/Fs occurred 1200 m downwind from the cement plant. The levels of ∑16 PAHs ranged from 130.6 to 1134.3 μg kg in the sampled soils. Source identification analysis suggested that the cement plant was the most likely source of PAH contamination. The concentrations of most of the heavy metals detected in the sampled soils were close to background levels, except for the levels of cadmium (Cd) and mercury (Hg), which were, on average, two times and six times higher than background values, respectively. The co-incineration of sludge, coal, and hazardous waste in the cement plant is a major contributing cause for the high levels of Hg in the surrounding soil. Risk assessment models, both the incremental lifetime cancer risks (ILCRs) for PAHs and the potential ecological risk index (RI) for heavy metals, indicate potential risks to the population and the environment surrounding the cement plant.
中国政府鼓励国内水泥生产商将传统的煤炭能源转变为废物的共处理，作为该行业的主要能源。本研究分析了北京一家水泥厂周围土壤中采集的 32 个样本，以检测 16 种美国环保署优先控制的多环芳烃（PAHs）和 12 种重金属。选择了 10 个样本进行多氯二苯并对二恶英和多氯二苯并呋喃（PCDD/Fs）分析。调查和评估了污染分布模式、来源以及对人类健康和环境的潜在风险。PCDD/Fs 的最高浓度出现在距水泥厂 1200 米的下风处。采样土壤中∑16 PAHs 的浓度范围为 130.6 至 1134.3μg/kg。来源识别分析表明，水泥厂是 PAH 污染的最可能来源。除镉（Cd）和汞（Hg）的浓度外，采样土壤中检测到的大多数重金属的浓度接近背景水平，Cd 和 Hg 的浓度平均分别比背景值高 2 倍和 6 倍。水泥厂中污泥、煤炭和危险废物的共焚烧是造成周围土壤中 Hg 含量高的主要原因。风险评估模型，包括 PAHs 的增量终生癌症风险（ILCRs）和重金属的潜在生态风险指数（RI），均表明水泥厂周围的人群和环境存在潜在风险。
