期刊
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
卷 41, 期 1, 页码 -出版社
WILEY
DOI: 10.1002/ep.13725
关键词
biosorption; biosorption kinetics; fluoride; isotherms; Rhizopus oryzae
类别
资金
- Bushehr University of Medical Sciences [150]
The study demonstrated that Rhizopus oryzae fungal biomass was effective in removing fluoride from aqueous solutions, with the optimum conditions achieving a 90.5% biosorption rate. The Langmuir model best fitted the data, indicating a monolayer biosorption of fluoride by the biosorbent.
Removal of high fluoride contents from aqueous solutions by inexpensive, and biocompatible biosorbent is a main concern for human health. In the present study the efficacy of Rhizopus oryzae fungal biomass in removal of fluoride from aqueous solutions considering the effects of different parameters such as contact time (10-180 min), initial fluoride concentration (2-10 mg/L), and biosorbent dose (0.25-2 g/L) was studied in a batch system. The optimum condition for the maximum fluoride biosorption (90.5%) was obtained at 2 g/L biosorbent dose, 30 min contact time and 2 mg/L initial fluoride concentration. The Langmuir model (R-2 = 0.9844) fitted better than the other models and showed a homogeneous biosorption surface with the possibility of a monolayer biosorption of fluoride by biosorbent. The Langmuir maximum biosorption capacity of fluoride for R. oryzae was obtained at 1.16 mg/g. The biosorption kinetic was controlled by the pseudo-second-order (R-2 = 0.9999) model and based on the intra-particle diffusion model; the fluoride biosorption rate was not controlled only by the mechanisms of intra-particle diffusion. Consequently, the results showed that fungal biomass can be used as a suitable biosorbent for fluoride removal from aqueous solutions.
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