Thermal Desorption Experiment of Polycyclic Aromatic Hydrocarbons (PAHs) Contaminated Soil Used as Cement Raw Meal

Abstract:

Sample polluted soil surrounding Shougang as object, TG, thermal analysis of raw soil and cement raw meal experiments were made, the results show that: the polluted soil contains a variety of PAHs of organic pollutants, the total concentration of PAHs is about 156.39ppm. PAHs contaminated soil can be divided into three stages of weight loss at 850°C: water losing stages, organic matter decomposition stages and inorganic carbonate decomposition stages. With the increase in heating temperature, removal rate of total PAHs in raw soil is high. Using polluted soil as cement siliceous raw material, except naphthalene, acenaphthene, two hydrogen acenaphthene and anthracene, other organic compounds of PAHs have residues at 300°Cand small amounts of phenanthrene have residue at 600°C, means cement raw material has certain adsorption of PAHs pollutants. Therefore, when co processing PAHs polluted soil into the cement kiln, considering should be focused the content of pollutants in flue gas volatilization and C2 raw mill especially.

• Periodical: Applied Mechanics and Materials (Volumes 587-589)
• Pages: 860-864
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.587-589.860
• Online since: July 2014
• Authors: De Wei Dai, Chun Ping Li*, Li Zhu Tian
• Keywords: Polluted Soil , Polycyclic Aromatic Hydrocarbons (PAHs), Raw Meal, TG, Volatile

References

[1] HUANG N Q, LI L, LI X G. Soil pollution remediation [J]. Environmental Science trends, 2000, (3)：25~27. (In Chinese).

[2] ZHU L Z, LU L, ZHANG D. Mitigation and remediation technologies for organic contaminated soils[J]．Environ Sci Engin China, 2010, 4(4): 373~386.

DOI: 10.1007/s11783-010-0253-7

[3] A Mackenzie, A S Ball, S R Virdee. Instant notes in Ecology[M]. BIOS Scientific publishers limited, 1999, 295~297.

[4] Keiek E，Rojas M，Alexandorv K，et a1．Polycyclic aromatic hydrocarbon—DNA adducs in humans：relevance as biomarkers for exposure and cancer risk[J]．Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis, 1998, 400: 231~251.

DOI: 10.1016/s0027-5107(98)00065-7

[5] M.T. Balba, N. Al-Awadhi, R. Al-Daher. Bioremediation of oil-contaminated soil-microbio-logical methods for feasibility assessment and field evaluation[J]. Journal of Microbiological Methods, 1998, 32: 155~164.

DOI: 10.1016/s0167-7012(98)00020-7

[6] Sims J L, Approach to Bioremediation of Contaminated Soil[J]. Hazardous Waste & Hazardous Materials, 1990, 7(2): 117~149.

DOI: 10.1089/hwm.1990.7.117

[7] MA X M. Study on soil pollution status and prevention countermeasures [J]. technology and economic market, 2011, 8: 92~93. (In Chinese).

[8] YU G, NIU J F, HUANG J et al. Persistent organic pollutants [M]. Beijing: Science Press, 2005. (In Chinese).

[9] FENG Y, LU Y L, JIAO W T et al. Distribution and Risk of Polycyclic Aromatic Hydrocarbons in Soils from Different Workshops of an Abandoned Coking Factory in Beijing[J]. Asian Journal of Ecotoxicology, 2009, 4(3): 399~407. (In Chinese).

[10] DU S Y, CUI Z J. Characteristics and environmental behavior of persistent organic pollutants in environmental media [M]. Beijing: Science Press, 2013. (In Chinese).

[11] Batchelor B．Overview of waste stabilization with cement[J]．Waste Management, 2006, 26: 689~698.

DOI: 10.1016/j.wasman.2006.01.020

[12] SHEN X D, XU Z X. Treatment of industrial hazardous waste using incineration system of cement rotary kiln [J]. Cement engineering, 2002, (5): 6l~63. (In Chinese).

[13] XIAO Z M, LI J L. Cement technology [M]. Beijing: Chemical Industry Press, 2006. (In Chinese).