Experimental Study on the Detoxification of Chrome Sludge by Making Bricks

Article Preview

Abstract:

In order to eliminate the toxicity of chromium sludge, hexavalent chromiumwas changed into trivalent chromium. Chromium sludge, coal and clay were used at the ratio of 0-12%:90-78%:10% to manufacture sludge bricks. Meanwhile, the influences of the sludge mass fraction, molding pressure, sintering temperature and sintering time on weight loss on ignition, chromium leaching concentration, water absorption and compressive strength of bricks were also investigated. The results indicated that the conditions for manufacturing good quality bricks was 8% sludge with 4h of sintering prepared in 20MPa molding pressure and sintered at 950°C, which can reach the national standards (HJ/T 301-2007). Furthermore, wastes were changed into resources and economical benefits were brought to the company.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

708-713

Citation:

Online since:

January 2014

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2014 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] L.P. Zheng, Chromium and human health, Beijing: WenJin Press. (1992)20-26.

Google Scholar

[2] W.Y. Zhao, Y.L. Zheng, L. Guan, The research of Chromium slag pollution mechanism to groundwater, soil, vegetables, J. Environmental Protection Science. 20(1994)15-19.

Google Scholar

[3] Z.Q. Meng, Environmental toxicology, Beijing: Higher Education Press. (2003)25-30.

Google Scholar

[4] Q. Qu, Introduction of the new national hazardous waste list, to promote hazardous waste management, J. ENVIORNMENTAL EDUCATION. 7( 2008)1-3.

Google Scholar

[5] G. Yang, The extraction of hexavalent chromium in the chrome slag and the utilization technology research of yellow chrome pigment, D. MASTER'S THESIS of Central China Normal University. (2002)10-15.

Google Scholar

[6] Cioffia. R, Lavorgnab. M, Santoro. L, Environmental and technological effectiveness of a process for the stabilization of a galvanic sludge, J . Journal of Hazardous Materials. 89 (2002)165-175.

DOI: 10.1016/s0304-3894(01)00310-7

Google Scholar

[7] Espinosa.C. R, Tenório A. S, Laboratory study of galvanic sludge's influence on the clinkerization process, J. Resources Conservation and Recycling. 31(2000)71-82.

DOI: 10.1016/s0921-3449(00)00072-0

Google Scholar

[8] Secretary for Administration, The practical technical guidelines of electroplating sludge and chromium slag resource, Beijing: China Environmental Science Press. (1997)2-3.

Google Scholar

[9] X.Q. Chen, Y.F. Gu, Investigation on the Disposal Tannery sludge, J. WEST LEATHER. 28 (2006)3-4.

Google Scholar

[10] D. YAO, H.Q. Wang, X.Q. Chen, Research on use of Tanning Sludge for Bricks Making, J. WEST LEATHER. 29(2007)2-5.

Google Scholar

[11] Z.Z. Lin, J. Wang, L.S. Zhang, Application of municipal sewage sludge in fired brick manufacture , J. Chinese Journal of Environmental. 3(2009)1875-l878.

Google Scholar

[12] Y. Jia, H.Y. Yang , the technology research of brick made with high content sewage sludge , J. China Water Transport. 8(2008)216-217.

Google Scholar

[13] L.P. Guan, The test research of making permeable brick with urban sludge, J. JiNan: JINAN UNIVERSITY. (2008).

Google Scholar

[14] X.Y. Zhang, The use of residual materials in the Chinese brick and tile industry, J. Brick and tile industry international. 4(2003)22-27.

Google Scholar

[15] W. Ma, S.B. Hu, H.H. Fan, J.J. Dou, The research of manufacture of mud brick and influencing factors, J. Journal of northwest agriculture and forestry university of science and technology. 39(2011)141-145.

Google Scholar

[16] L.L. Xu, W. Guo, The sintering mechanism research of sintered brick with high content of fly ash , J. FLY ASH COMPREHENSIVE UTILIZATION. 5(2001)30-31.

Google Scholar

[17] H.L. Gao, Research of copper slag and sand manufacture economical ground brick, D. HuBei: Wuhan university of technology. (2005)36-39.

Google Scholar

[18] Leist M, et a1, The fixation and leaching of cement stabilized arsenic, J. Waste Management. 23(2003)359-359.

DOI: 10.1016/s0956-053x(02)00116-2

Google Scholar

[19] Humayoun Akhter, Frank K. Cartledge, Amitava Roy et a1, Solidification/Stabilization of arsenic salts: Effects of long cure times. J. Journal of Hazardous Material. 52(1997) 247-264.

DOI: 10.1016/s0304-3894(96)01811-0

Google Scholar

[20] S.H. Chen, F.L. Cheng, Arsenic contaminated site at all abandoned copper amelter plant: waste characterization and solidification/stabilization treatment, J. Chemosphere. 53(2003) 691-703.

DOI: 10.1016/s0045-6535(03)00519-8

Google Scholar

[21] J.C. Tang, I.G. Ding, H. Yin, et a1. Assessment and toxicity extraction on brickmaking from chr ome slags, J. INDUSTRIAL SAFETY AND DUST CONTROL. 27(8)( 2001)33-34.

Google Scholar

[22] G.L. Xu, Z. Tan, Y.H. Ji, et a1, The experimental research of heavy metal solidification treatment, J . Environmental engineering. 12(3)(1994) 40-44.

Google Scholar