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Title: Trypsin-immobilized silica: A novel adsorbent for V(IV) and V(V) removal from water
Authors: Yayayuruk, Aslı Erdem 
Shahwan, Talal 
Sxanlı-Mohamed, Gulsah 
Eroglu, Ahmet E. 
Keywords: Trypsin;Vanadium;Removal;Angiotensin converting enzyme;Silica;Inductively coupled plasma mass spectrometry;Inductively coupled plasma spectrometry
Issue Date: 2018
Publisher: Water Environment Research
Abstract: In the present study, trypsin-immobilized silica was employed for the removal of V(IV) and V(V) ions from water. The synthesized sorbent was first characterized and then investigated for the removal of V(IV) and V(V) under various experimental conditions. The adsorption performance of the sorbent was tested as a function of pH, sorbent amount, initial vanadium concentration, contact time, and temperature. The sorption process was then investigated, both from a kinetic perspective and also in terms of isotherm models. The Langmuir adsorption isotherm was the best model to describe the sorption process. Sorption thermodynamics were spontaneous and exothermic. The proposed method was successfully applied to real samples for the removal of V(IV)and V(V) with sufficient accuracy and precision.
DOI: 10.2175/106143017X15131012188196
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