| Autor: |
Babu Rao, G., Krishna Prasad, M., Kishore Kumar, K., Murthy, Ch. V. R. |
| Předmět: |
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| Zdroj: |
Rasayan Journal of Chemistry; Jul-Sep2016, Vol. 9 Issue 3, p373-385, 13p |
| Abstrakt: |
The present study attempts to analyze the biosorption trend of biosorbent Sargassum sp (macroalgae) biomass for removal of toxic heavy metal ion Cd (II) from solution as a function of initial metal ion concentration, pH, temperature, sorbent dosage. The sorption data fitted with various isotherm models and Freundlich model was the best one with correlation coefficient of 0.999. Kinetic study results revealed that the sorption data on Cd (II) with correlation coefficient of 0.999 can best be represented by pseudo second-order. The biosorption capacity (qe) of Cd (II) is 9.75 mg/g on Sargassum sp biomass. Thermodynamic studies showed that the process is exothermic (ΔH° negative).Free energy change (ΔG°) with negative sign reflected the feasibility and spontaneous nature of the process. The SEM studies showed Cd (II) biosorption on selective grains of the biosorbent. The FTIR spectra indicated bands corresponding to -OH, COO-, -CH, C=C, C=S, and -C-C- groups were involved in the biosorption process. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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