Content and Speciation of Heavy Metals in Residues of Used Tires Treated with Supercritical Water

Abstract:

Used tires were subjected to supercritical water and supercritical water with H₂O₂. The distribution of heavy metals (Pb, Mn, Ni, Cu, Zn, Cd, Cr) in used tires and the corresponding residues were analyzed. BCR sequential extraction procedure was applied to examine the speciation of heavy metals mentioned above. The results showed that: the contents of Mn, Zn, Cu, Pb, Cd increased after supercritical water treatment while that of Cr and Ni decreased significantly. The addition of H₂O₂ was beneficial for the increase of heavy metals concentration and sequestration. The sequestration rate of Mn, Zn, Cu, Pb, Cd, Cr reached to 90% after the addition of H₂O₂, and that of Ni was much lower as 40%. The main speciation of Cr and other heavy metals were in residual form and oxidate form respectively. The speciation of all heavy metals were transferred from the unstable forms of weak acid soluble and reducible to relatively stable forms of oxidizable and residual.

• Periodical: Applied Mechanics and Materials (Volumes 448-453)
• Pages: 3082-3087
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.448-453.3082
• Online since: October 2013
• Authors: Gui Fang Chen, Yong Zhang, Shou Yan Chen, Chun Yu Ma
• Keywords: BCR, H₂O₂, Sequestration Rate, Speciation, Supercritical Water, Used Tires

References

[1] Yan Dahai. Application and test of pyrolysis products of pyrolysis mechanism and dynamic model of waste tires in rotary kiln [D]. Hangzhou：Zhejiang University，2006，2-4.

[2] Wang Xuefeng, Liu Qianxia. Chemical Industry and Engineering Progress，2001, （10）: 36-39.

[3] Ge Hongguang, Shu Chenhua, Song Fengmin. Chemical Engineer, 2008, 22（6）: 1-2.

[4] Du Zhaohui, Sun Shufang. Journal of Liaoning University of Petroleum &Chemical Technology，2006, 26（2）：15-18.

[5] Wang Chunying，Qi Xinhua，Wang Pan. Tian Jin Chemistry Industry，2008, 22（2）：35-36.

[6] Sangdo Park, Earnest F. Gloyna. Fuel, 1997, 76(11): 999-1003.

[7] Zhen Fang, Janusz A. Kozinski. Fuel, 2002, 81(7): 935-945.

[8] C.M. Wai, Shaofen Wang. Journal of Chromatography A, 1997, 785（1-2）: 369-383.

[9] Chester T. L, Pinkston J. D, Raynie D. E . Anal. Chem, 1998, 70 (12) : 301-319.

[10] Juliana Q. Albarelli, Rodrigo B. Rabelo, Diego T. Santos. The Journal of Supercritical Fluids, 2011, 58(3): 343-351.

[11] Qi Xin-Hua, Zhuang Yuan-Yi．Application of supercritical fluid technology in environmental science [M]．Beijing：Science Press，2005，49-57.

[12] Cui Hong-You, Wang Tao, Guan Yan-Fen. Journal of Chemical Industry and Engineering (China)，2001，52(9): 829-834.

[13] G Anitescu, LL Tavlaredis. The Journal of Supercritical Fluids, 2006, 38(2): 167–180.

[14] Shaofen Wang, Yuehe Lin, Chien M. Wai. Separation Science and Technology 2003, 38(10): 2279–2289.

[15] Jaka Sunarso, Suryadi Ismadji. Journal of Hazardous Materials, 2009, 61(1): 1-20.

[16] D. Bo, F.S. Zhang, L.J. Zhao. Journal of Hazardous Materials, 2009, 170(1): 66–71.

[17] Fu-Rong Xiu, Yingying Qi, Fu-Shen Zhang. Waste Management, 2013: 1-7.

[18] Xiu Furong, Zhang Fushen. Journal of Hazardous Materials, 2009, 170 (1): 191-196.

[19] Xiu Furong, Zhang Fushen. Journal of Hazardous Materials, 2009, 165(1-3): 1002-1007.

[20] RAURET G，LOPEZ-SANCHEZ J F，SAHUQUILLO A. Journal of Environmental Monitoring, 1999, 1(1): 57-61.

[21] Feng Suping, Liu Shentan, Du We. Journal of Insrumental Analysis, 2009, 28（3）: 297-300.

[22] Zhang Yong, Chen Guifang, Ma Chunyuan. Annual symposium of engineering thermophysics in (2012).

[23] Xu Zhirong, Zhu Wei, Bao Jianping. 2011 International Symposium on Water Resource and Environmental Protection. 2011, 2: 1260-1263.

DOI: 10.1109/iswrep.2011.5893247

[24] Dai Tagen. Applied Geochemistry[M]. Changsha：Zhongnan University Press, 2005: 6.