NDLI: Enhanced biosorption of metal ions from wastewater by Fenton modified Hydrilla verticillata dried biomass

Content Provider	Springer Nature Link
Author	Tripathi, B. D. Mishra, A. Rai, A. K.
Copyright Year	2014
Abstract	Present study deals with the biosorption of metal ions (Cu$^{2+}$, Zn$^{2+}$, Pb$^{2+}$, and Cd$^{2+}$) from aqueous solutions as well as from wastewater using Fenton modified Hydrilla verticillata dried biomass. Fenton modification process was optimized by varying different parameters such as pH, temperature, contact time, and Fe$^{2+}$/H$_{2}$O$_{2}$ ratio. The modified biosorbent was characterized by using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and Malvern particle size analyzer. Energy-dispersive X-ray spectroscopy analysis revealed the enhancement in weight percent of Cu$^{2+}$ (47.53 %), Zn$^{2+}$ (41.82 %), Pb$^{2+}$ (43.76 %), and Cd$^{2+}$ (43.15 %) ions on the surface of modified biosorbent after the biosorption process. The experimental data obtained from the batch study were modeled using Langmuir and Freundlich isotherm models. Experimental data showed best fitting to Freundlich isotherm model. The increase in biosorption capacity after the Fenton modification was observed, which follows the sequence: Cu$^{2+}$ > Pb$^{2+}$ > Cd$^{2+}$ > Zn$^{2+}$. The biosorption process followed the pseudo-second-order kinetics, suggesting that the chemisorption may be the rate-limiting step in this study. The thermodynamic study revealed that the biosorption process was spontaneous and exothermic in nature. The biosorption capacity for multi-metal solution was found to be relatively lower than the single-metal solution. Performance of batch reactor in treating wastewater showed significant increase in removal efficiency of Cu$^{2+}$ (from 74 to 96 %), Zn$^{2+}$ (from 67 to 84 %), Pb$^{2+}$ (from 71 to 92 %), and Cd$^{2+}$ (from 71 to 89 %) ions after the modification of biosorbent as compared to raw biomass.
Starting Page	3443
Ending Page	3456
Page Count	14
File Format	PDF
ISSN	17351472
Journal	International Journal of Environmental Science & Technology
Volume Number	12
Issue Number	11
e-ISSN	17352630
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-11-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecotoxicology Wastewater Water Management Thermodynamics Waste Water Technology Aquatic Pollution Isotherms Environment Kinetics Water Pollution Control Environmental Chemistry Metal ions Environmental Science and Engineering Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Environmental Engineering Agricultural and Biological Sciences

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