DESIGN AND OPTIMIZATION FOR HAZARDOUS JAROSITE WASTE RECYCLING IN ENVIRONMENTALLY SUITABLE COMPOSITE PRODUCTS USING RESPONSE SURFACE METHODOLOGY - Management of Hazardous Residues Containing Cd - page 90

890 g 890 g

A: Jarosite A: Jarosite

2 2

Design Points Design Points

0.62 0.62

110.00 110.00

0.51 0.51

0.29 0.29

0.00 0.00

2 2

0.40 0.40

0.29 0.29

0.17 0.17

2 2 2 2

615 g 615 g

725 g 725 g 275.00

Cadmium

275.00
Cadmium

C:
PCCRs

C:
PCCRs

B: Clay B: Clay

Figure 27. Response contour plot for leachate of Cd (ppm) in the s/s sintered Jarosite
waste -clay -PCCRs composite bricks.

Actual Components:
X 1 = Jarosite = 515 g
X 2 = Clay = 282.5 g
X 3 = PCCRs = 202.5 g

0.81 0.81

0.65 0.65

0.50 0.50

0.35 0.35

0.20 0.20

X1 (890g) X1 (890g)

X2 (110 g) X2 (110 g)

X3 (615 g) X3 (615 g)

X3 (0 g) X3 (0 g)

X1 (27 g) X1 (27 g)

X2 (725 g) X2 (725 g)

Figure 28. Response 3D graph for leachate of Cd (ppm) in the s/s sintered Jarosite
waste -clay -PCCRs composite bricks.