Abstract— In this study, a non commercial PTE was covalently immobilized on the NaX zeolite crystals and its ability to biodegrade the paraoxon to a less harmful compound was investigated. The immobilization method did not change the enzyme catalytic performance. In fact, the specific activity was the same of the free one. Besides, the process improved the stability of the enzyme.
The obtained results are interesting because of usually the immobilization process increases the enzyme stability but causes a reduction of its catalytic activity. Therefore, this pioneer study of the immobilization of the PTE on zeolite particles seems to be an environmental-friendly solution to the problem of pesticides pollution.
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