Abstract
The present work is aimed to show the effects of environmental parameters such as temperature, pH, ionic strength, and sodium nitrate on enzyme activity of a LiP Isoenzymes Mixture (LIM) obtained from an immobilized culture of Phanerochaete chrysosporium. LIM enzyme stability was also evaluated. The results are discussed in detail and a comparison with literature data is carried out. LIM showed high activity at pH 3.0 in the temperature range 30 to 40°C, it is able to catalyze oxidation reactions at acid pH (2.5<pH<6) and over a wide range of temperatures (25 to 60°C). Ionic strength below 0.2 M had no effect on enzyme activity at pH 4.7 and 39°C. An evaluation of the time decay constant of LIM activity under a specific combination of parameters was also conducted. Finally, an LIM activity and durability map shows the optimal working conditions that might be suitable for its practical application in waste bioremediation processes.
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