Sorbents | pH | Cr(III) | Cr(VI) | References |
Ectodermis of opuntia | 4 | 15.38 | 2.91 | [6] |
Wheat bran | 3 | - | 0.942 | [9] |
Palm flower | 4.5 | 5.99 | 4.90 | [37] |
Hazelnut shell | 4 | 3.08 | - | [48] |
Hazelnut shell | 2 | - | 17.7 | [48] |
Cross-linked chitosan | 4 | 6.00 | 215 | [49] |
Rose waste | 5 | 67.34 | - | [50] |
Rice bran | 5 | 0.13 | 0.069 | [51] |
Native saltbush stem | 5 | 16.3 | 0.00 | [52] |
Native saltbush leaves | 5 | 22.7 | 0.1 | [52] |
Native saltbush flowers | 5 | 27 | 0.1 | [52] |
Lignin | <3 | 6.59 | - | [53] |
Lignin | <2 | - | 5.64 | [53] |
Rubber wood saw dust | 2 |
| 4.87 | [54] |
Okra leaves | 4 | 221.17 | - | This study |
Okra leaves | 2 | - | 81.94 | This study |