DESIGN AND OPTIMIZATION FOR HAZARDOUS JAROSITE WASTE RECYCLING IN ENVIRONMENTALLY SUITABLE COMPOSITE PRODUCTS USING RESPONSE SURFACE METHODOLOGY - Management of Hazardous Residues Containing Cd - page 87

A: Jarosite
890 g

A: Jarosite
890 g

2 2

1.87 1.87

Design Points Design Points

1.7917 1.7917

1.71 1.71

0 g 0 g 110 g 110 g

2 2

1.63 1.63

1.55 1.55

2 2 2 2

725 g 725 g 275.00 275.00 615 g 615 g

B: Clay B: Clay C: PCCRs C: PCCRs

Figure 21. Response Contour plot for density (g/ cm 3 ) of s/s sintered Jarosite waste-
clay -PCCRs composite bricks.

Density Density

2.00 2.00

1.86 1.86

1.72 1.72

1.58 1.58

1.44 1.44

X1 (890 g) X1 (890 g)

X2 (110 g) X2 (110 g)

X3 (615 g) X3 (615 g)

X3 (0 g) X3 (0 g)

X1 (275 g) X1 (275 g)

X2 (725 g) X2 (725 g)

Actual Components:
X 1 = Jarosite = 515 g
X 2 = Clay = 282.5 g
X 3 = PCCRs = 202.5 g
Figure 22. Response 3D graph for density (g/ cm 3 ) of s/s sintered Jarosite waste-clay -
PCCRs composite bricks.