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- Title
A QICAR model for quantifying connection between metal ionic character and biosorption capacity of Pleurotus eryngii.
- Authors
Nan He; Wan Li; Heng Xu
- Abstract
Quantitative ion character-activity relationship (QICAR) was used for quantifying connection between metal ionic characteristics with maximum biosorption capacity (qmax). qmax of Pleurotus eryngii was determined by Langmuir isotherm decreasing in the order of: Pb2+>Cr3+>Cu2+>Zn2+>Cd2+>Ni2+>K+. In batch studies, Minimum Run Res V Design was used to determine the most significant medium factors. It was found that pH, biomass loading, and contact time manifest stronger influence on biosorption of Pb2+ and Cd2+. In the 22 physiochemical characteristics of metal ions, Covalent Index X2m r was correlated best with qmax for all metal ions tested (R2 = 0.69). Classifying metal ions appropriately could improve models and more ionic properties could be significantly correlated with qmax. It turned out that the best fitting parameter for divalent metal ions was X2m r (R2 = 0.93) and for transition metal ions was ∣ log KOH ∣ (R2=0.90). Moreover, two-variable model had greater ability to improve the fitting result (R2=0.00).
- Subjects
METAL ion absorption &; adsorption; SORPTION techniques; LANGMUIR isotherms; PLEUROTUS; CARBON content of plant biomass; COVALENT bonds
- Publication
Desalination & Water Treatment, 2014, Vol 52, Issue 34-36, p6519
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2013.815586