DESIGN AND OPTIMIZATION FOR HAZARDOUS JAROSITE WASTE RECYCLING IN ENVIRONMENTALLY SUITABLE COMPOSITE PRODUCTS USING RESPONSE SURFACE METHODOLOGY - Management of Hazardous Residues Containing Cd - page 78

Table 28. ANOVA for mixture reduced
cubic model for response shrinkage

Source Sum of

Squares

DF Mean

Square

F Value Prob > F

Model 1862.76 7 266.11 444.13 < 0.0001 significant

Linear Mixture 1638.32 2 819.16 1367.14 < 0.0001

AB 106.34 1 106.34 177.48 < 0.0001

AC 12.51 1 12.51 20.87 0.0038

BC 25.94 1 25.94 43.29 0.0006

ABC 60.14 1 60.14 100.38 < 0.0001

AC(A-C) 19.52 1 19.52 32.57 0.0013

Residual 3.60 6 0.60

Lack of Fit 0.98 2 0.49 0.75 0.5291 not

significant

Pure Error 2.62 4 0.65

Cor Total 1866.35 13

Table 29. ANOVA for mixture quadratic model for response density
Source Sum of

Square

DF Mean

Squares

F
Value

Prob > F

Model 0.25 5 0.050 76.91 < 0.0001 significant

Linear
Mixture

0.20 2 0.098 152.01 < 0.0001

AB 0.013 1 0.013 20.58 0.0019

AC 8.320E-

003

1 8.320E-

003

12.93 0.0070

BC 6.092E-

004

1 6.092E-

004

0.95 0.3591

Residual 5.149E-

003

8 6.437E-

004

Lack of
Fit

1.849E-
003

4 4.624E-

004

0.56 0.7057 not

significant

Pure
Error

3.300E-
003

4 8.250E-

004

Cor
Total

0.25 13