Effective Biosorption of Nickel(II) from Aqueous Solutions UsingTrichoderma viride

P. Sujatha,V. Kalarani,B. Naresh Kumar

doi:10.1155/2013/716098

P. Sujatha, V. Kalarani + Show 1 more

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https://doi.org/10.1155/2013/716098

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Abstract

The primary objective of the present study is to evaluate the optimization conditions such as kinetic and equilibrium isotherm models involved in the removal of Ni(II) from the aqueous solutions byTrichoderma viride. The biosorbent was characterized by FTIR and SEM. The optimum biosorption conditions were determined as a function of pH, biomass dosage, contact time, initial metal ion concentration, and temperature. The maximum Ni(II) biosorption was obtained at pH 4.5. The equilibrium data were better fit by the Langmuir isotherm model than by the Freundlich isotherm. The kinetic studies indicate that the biosorption process of the metal ion Ni(II) has followed well the pseudo-second-order model. The sum of the square errors (SSE) and chi-square (χ2) tests were also carried out to find the best fit kinetic model and adsorption isotherm. The maximum biosorption capacity (qm) ofT.viridebiomass was found to be 47.6 mg/g for Ni(II) ion. Therefore, it can be concluded thatT.viridebiomass was effective and low-cost potential adsorbent to remove the toxic metal Ni(II) from aqueous solutions. The recovery process of Ni(II) fromT.viridebiomass was found to be higher than 98% by using 0.25 M HNO3. Besides the application of removal of toxic metal Ni(II) from aqueous solutions, the biosorbentT.viridecan be reused for five consecutive sorption-desorption cycles was determined.

Highlights

Metal pollution has been a great concern for the past few decades
All these biological disorder consequences alarm the need of nickel removal from the environment and to bring up its levels below the threshold limits from its sources. e classical physicochemical methods are commonly used for the removal of nickel from the industrial effluents, namely, evaporative recovery, ltration, ion exchange, and membrane technologies. ough they are promising to some extent, but these processes have high reagent or energy requirements and generate toxic sludge that requires careful disposal [10]
Insufficient removal of traces of heavy metal ions, varying performances, and high operating costs has limited the use of conventional physicochemical methods. us, there is a need for alternative methods for better efficacy Journal of Chemistry with low cost and complete removal of toxic metals from the water bodies

Summary

Introduction

Metal pollution has been a great concern for the past few decades. It is believed that the wide use of man-made chemicals, anthropogenic lifestyle, and rapid industrialization is the major source of metal toxicity [1]. Ough, it is an essential micronutrient and/or cofactor, nickel is one of the heavy metal toxicants at higher concentration and is a well-known human carcinogen [7]. E higher concentration of Nickel causes dermatitis, nausea, vomiting, behavioral, and respiratory problems in addition to cyanosis, gastrointestinal distress, and weakness [9] All these biological disorder consequences alarm the need of nickel removal from the environment and to bring up its levels below the threshold limits from its sources. Insufficient removal of traces of heavy metal ions, varying performances, and high operating costs has limited the use of conventional physicochemical methods. Studies on the kinetic and equilibrium isotherm models have been studied, in order to systematically investigate the application of biomass, T. viride as biosorbent for the removal of nickel ions from water/industrial waste water. The Ni(II) ion desorption studies have been performed over ve sorption-desorption cycles to evaluate the sorbent T. viride for reusage

Experimental

Results and Discussion

Conclusion