Improvement of ground granulated blast furnace slag on stabilization/solidification of simulated mercury-doped wastes in chemically bonded phosphate ceramics.
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.
Liu
Zhongzhe
Z
School of Environmental Engineering, Shanghai University, Shanghai 200072, PR China.
Qian
Guangren
G
Zhou
Jizhi
J
Li
Chuanhua
C
Xu
Yunfeng
Y
Qin
Zhe
Z
D002516:Ceramics / Q000737:chemistry*; D006256:Hazardous Waste / Q000032:analysis*; D008627:Mercuric Chloride / Q000032:analysis*; D008956:Models, Chemical; D010316:Particle Size; D010710:Phosphates / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*; D013499:Surface Properties; D014961:X-Ray Diffraction
D006256:Hazardous Waste; D010710:Phosphates; D008627:Mercuric Chloride