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Table 2 Taguchi design and obtained results for simultaneous removal percentage of MG, RhB and CR

From: Simultaneous elimination of Malachite Green, Rhodamine B and Cresol Red from aqueous sample with Sistan sand, optimized by Taguchi L16 and Plackett–Burman experiment design methods

No pH Adsorbent dosage NaCl added Contact time Initial dye concentration MG1 (%) MG2 (%) MG3 (%) CR1 (%) CR2 (%) CR3 (%) RhB1 (%) RhB2 (%) RhB3 (%)
1 1 1 1 1 1 81 85 79 64 64 67 88 87 83
2 1 2 2 2 2 88 82 81 80 79 74 89 87 83
3 1 3 3 3 3 86 86 85 79 83 73 86 88 83
4 1 4 4 4 4 83 83 78 68 66 71 79 75 80
5 2 1 2 3 4 82 87 81 56 56 58 82 76 75
6 2 2 1 4 3 93 92 91 71 66 67 90 87 90
7 2 3 3 1 2 92 86 97 94 86 87 77 76 80
8 2 4 3 2 1 93 94 93 95 88 99 87 81 83
9 3 1 3 4 2 87 80 91 73 75 68 86 81 89
10 3 2 4 3 1 93 89 93 91 93 87 87 83 86
11 3 3 1 2 4 97 89 99 70 72 67 82 75 79
12 3 4 2 1 3 97 98 93 82 77 84 79 73 75
13 4 1 4 2 3 87 80 83 76 78 74 73 75 72
14 4 2 3 1 4 96 92 97 82 80 75 71 74 72
15 4 3 2 4 1 94 98 98 80 79 80 94 92 97
16 4 4 1 3 2 96 90 92 79 73 77 94 86 86