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192

192

Tubie 7.2

Physical, Chemical, mineralogical compositions and metals leaching

behavior (TCLP) of CMWR, TCMT and ShB.

			CMWR	TCMT	ShB
Physical properties	Specific gravity (g.cm'^3) Specific surface area (m^g'^1) Plasticity limit (%) Plasticity index (%)		2.64 13.84 13.46 6.25	2.73 15.76 15.69 12.51	2.72 15.53 10.41 5.64
Major oxides (wt. %)	Si02		54.20	56.75	57.45
	AI2O3		17.68	18.80	15.21
	Fe203		8.90	8.94	6.28
	MgO		1.34	1.28	3.79
	Na20		0.64	0.68	1.03
	k2o		2.79	2.97	3.54
	CaO		1.00	0.84	2.83
	Ti02		0.76	0.83	0.69
	Carbone		6.09	1.21	0.92
	Sulphur		0.47	0.21	0.6
	LOI		12.50	8.75	6.45
Tracę elenients (ppm)	Ba		399	415	349
	Cr		198	192	91
	Pb		164	193	121
	Mo		33	36	33
	Co		29	32	23
	Ni		92	86	53
	Cu		34	72	29
	Cd		<5	<5	<5
	Zn		<55	<55	<55
	As		<5	<5	52
Mineralogical	Quartz		42	30	36
composition (%)	Chlorite Iib		12	10	13
	Muscovite		37	51	29
	Albite		4	4	13
	Calcite		-	-	2
	Pyrite		1	-	1
	Ankerite		2	-	4
	Anatase		2	-	2
Metals leaching	As	5000 *	30	30	30
(TCLP) (fig.L')	Ba	100000*	51	662	1350
	Cd	1000*	1.5	1.5	1.5
	Cr	5000*	7	9	9
	Cu	-	87	818	122
	Mo	-	4.5	4.5	4.5
	Pb	5000*	90	65	45
	Zn	2000 *	536	1170	335

• Rcgulation linii (US EPA limit*)