Improvement of ground granulated blast furnace slag on stabilization/solidification of simulated mercury-doped wastes in chemically bonded phosphate ceramics

Zhongzhe Liu; Guangren Qian; Jizhi Zhou; Chuanhua Li; Yunfeng Xu; Zhe Qin

doi:10.1016/j.jhazmat.2007.12.110

Improvement of ground granulated blast furnace slag on stabilization/solidification of simulated mercury-doped wastes in chemically bonded phosphate ceramics

J Hazard Mater. 2008 Aug 30;157(1):146-53. doi: 10.1016/j.jhazmat.2007.12.110. Epub 2008 Jan 12.

Authors

Zhongzhe Liu¹, Guangren Qian, Jizhi Zhou, Chuanhua Li, Yunfeng Xu, Zhe Qin

Affiliation

¹ School of Environmental Engineering, Shanghai University, Shanghai 200072, PR China.

PMID: 18289781
DOI: 10.1016/j.jhazmat.2007.12.110

Abstract

This paper investigated the effectiveness of (ground granulated blast furnace slag) GGBFS-added chemically bonded phosphate ceramic (CBPC) matrix on the stabilization/solidification (S/S) of mercury chloride and simulated mercury-bearing light bulbs (SMLB). The results showed that the maximal compressive strength was achieved when 15% and 10% ground GGBFS was added for HgCl(2)-doped and SMLB-doped CBPC matrices, respectively. The S/S performances of GGBFS-added matrices were significantly better than non-additive matrices. As pore size was reduced, the leaching concentration of Hg(2+) from GGBFS-added CBPC matrix could be reduced from 697 microg/L to about 3 microg/L when treating HgCl(2). Meanwhile, the main hydrating product of GGBFS-added matrices was still MgKPO(4).6H(2)O. The improvement of S/S effectiveness was mainly due to physical filling of fine GGBFS particles and microencapsulation of chemical cementing gel.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Ceramics / chemistry*
Hazardous Waste / analysis*
Mercuric Chloride / analysis*
Models, Chemical*
Particle Size
Phosphates / chemistry*
Refuse Disposal / methods*
Surface Properties
X-Ray Diffraction

Substances

Hazardous Waste
Phosphates
Mercuric Chloride