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- Title
Biosorption of Cd(II) from aqueous solutions using Crataegus oxyacantha stone and Punica granatum seed.
- Authors
Ebrahimi, A.; Ehteshami, M.; Dahrazma, B.
- Abstract
In this research, the biosorption of cadmium from aqueous solution byCrataegus oxyacantha(CO) stones andPunica granatum(PG) seeds was studied using batch technique. Experiments were conducted on factors, such as initial pH, biosorbent dosage, contact time, and initial concentration of cadmium. The equilibrium adsorption data were modeled according to Langmuir, Freundlich, and Dubinin–Radushkevich (D–R) isotherms. It was proven that D–R isotherm with a correlation coefficient of 0.991 was more precise for demonstrating adsorption capacity of CO compared to other two models. The Freundlich equation withR2value of 0.996 was used to represent PG adsorption data. By increasing the optimum dosage of PG and CO to 20 g/L, the Cd adsorption was increased to more than 93–95%. Adsorption mechanism was defined by pseudo-first- and pseudo-second-order kinetic models, and it was found that it follows a pseudo-second-order kinetic algorithm. The study showed that the PG and CO can be suitable adsorbents with high absorption capacities for removing Cd(II) from solution.
- Subjects
CADMIUM &; the environment; AQUEOUS solutions; ANALYTICAL chemistry; CRATAEGUS laevigata; POMEGRANATE; ATMOSPHERIC temperature; METAL absorption &; adsorption
- Publication
Desalination & Water Treatment, 2016, Vol 57, Issue 20, p9354
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2015.1029005