Effects of Co-Processing Sewage Sludge in the Cement Kiln on PAHs, Heavy Metals Emissions and the Surrounding Environment

被引:17
作者
Lv, Dong [1 ]
Zhu, Tianle [1 ]
Liu, Runwei [2 ]
Li, Xinghua [1 ]
Zhao, Yuan [1 ]
Sun, Ye [1 ]
Wang, Hongmei [3 ]
Zhang, Fan [3 ]
Zhao, Qinglin [4 ]
机构
[1] Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China
[2] Beijing Enterprises Holding Environm Technol Co L, Beijing 100124, Peoples R China
[3] Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China
[4] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Hubei, Peoples R China
关键词
cement plant; co-processing sewage sludge; PAHs; heavy metals; emission; surrounding environment; SECONDARY FUEL; PLANT; POLLUTANTS; PCDD/FS; VICINITY;
D O I
10.3390/ijerph15040698
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
To understand the effects of co-processing sewage sludge in the cement kiln on non-criterion pollutants emissions and its surrounding environment, the flue gas from a cement kiln stack, ambient air and soil from the background/downwind sites were collected in the cement plant. Polycyclic aromatic hydrocarbons (PAHs) and heavy metals of the samples were analyzed. The results show that PAHs in flue gas mainly exist in the gas phase and the low molecular weight PAHs are the predominant congener. The co-processing sewage sludge results in the increase in PAHs and heavy metals emissions, especially high molecular weight PAHs and low-volatile heavy metals such as Cd and Pb in the particle phase, while it does not change their compositions and distribution patterns significantly. The concentrations and their distributions of the PAHs and heavy metals between the emissions and ambient air have a positive correlation and the co-processing sewage sludge results in the increase of PAHs and heavy metals concentrations in the ambient air. The PAHs concentration level and their distribution in soil are proportional to those in the particle phase of flue gas, and the co-processing sewage sludge can accelerate the accumulation of the PAHs and heavy metals in the surrounding soil, especially high/middle molecular weight PAHs and low-volatile heavy metals.
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页数:12
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