Research Article
Grewia spp. Biopolymer as Low-Cost Biosorbent for Hexavalent Chromium Removal
Table 2
Langmuir and Freundlich isotherms parameters for Cr(VI) biosorption on Grewia spp. biopolymer.
| Isotherm model | pH 2 | pH 4 | pH 6 | pH 8 |
| Langmuir | | | | | Qmax | 1.555 | 1.661 | 5.258 | 1.613 | b | 0.331 | 0.584 | 0.240 | 0.52 | R2 | 0.9919 | 0.9969 | 0.9356 | 0.9029 |
| Freundlich | | | | | kF | 1.516 | 1.441 | 2.409 | 3.649 | n | 2.402 | 2.738 | 1.137 | 0.984 | R2 | 0.9936 | 0.9871 | 0.9967 | 0.9982 |
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