Lipase from Thermomyces lanuginosus (TLL) has been immobilized on Purolite Lifetech® ECR8806F (viz. methacrylate macroporous resin containing octadecyl groups, designated as C18-TLL), and the enzyme performance compared to that of octyl-agarose, agarose C8-TLL. The hydrolytic activity versus p-nitrophenol butyrate decreased significantly, a lower extent S-methyl mandelate (more than twofold), w...

The food industry is the main producer of waste. Therefore, development methodologies to reuse and make most it great interest. Food waste can contain compounds with added value that, if properly extracted used, be applied healthy foods (clean label), nutraceuticals, senior food, cosmetics, etc. revaluation by-products from citrus will possible reduce large volume lemon waste, reducing cost man...

This study focuses on the development of a novel two-stage (esterification–transesterification) synthesis biodiesel from used cooking oil (UCO) using ion exchange resins as catalysts. Esterification UCO has been conducted various types resin Purolite D5081, hyper cross-linked resin, showed best catalytic performance among all catalysts investigated, with 92% free fatty acid (FFA) conversion. Th...

The removal of dissolved organic carbon (DOC) is a key factor in the control disinfection by-product (DBP) formation drinking water. Ion exchange process deals with naturally negatively charged matter. A fluidized bed column test has been chosen to parallel efficiency 4 different anionic resins (Purolite PPA860S, Dowex TAN-1, Amberlite IRA-958 and IRA-410) terms DOC fraction related DBP reducti...

Lipase from Thermomyces lanuginosus (TLL) has been immobilized on a methacrylate macroporous resin coated with octadecyl groups (Purolite Lifetech®® ECR8806F). This immobilization protocol gave biocatalyst significantly higher stability than that obtained using octyl agarose. To further improve the features, we tried to covalently immobilize enzyme this support. For purpose, support was activat...

Platinum group elements (PGEs) are among the least abundant in continental crust. They have become excellent tracers of anthropogenic activities, particularly due to their use catalytic converters or medical industry. However, quantification environmental matrices is still problematic because low concentrations combined with presence interfering elements. Preconcentration methods therefore nece...

Enantioselective resolution processes can be improved by integration of racemization. Applying environmentally friendly enzymatic racemization under mild conditions is in particular attractive. Owing to the variety enzymes and progress enzyme engineering, suitable racemases found for many chiral systems. An amino acid racemase (AAR) from P. putida KT2440 capable processing a broad spectrum acid...

This paper presents the results of studies for niobium sorption from chloride solutions with use anion-exchange organic sorbents: Amberlite IRA-67, Purolite A-100, AB-17-8, and AN-2FN. Niobium was performed model niobium-containing solutions. Data on comparative characteristics studied sorbents were obtained, static exchange capacity sorbents, values distribution coefficients, extraction degree...