[Biosorbent using for hygienic property improvement of grape wines]
2009
Giryavenko, A.V. | Shcherbakov, S.S., Moscow State Univ. of Food Production (Russian Federation)
New biosorbents of microbial origin are estimated for wine material and wine improvement by removal of heavy metal (HM) ions and pesticide resudues. They are Veshevita (VS) which is a fungi Pleurotus mycelium received bysubmerged culture on starch-containing medium without any additional N sources and OK (isolated cell walls of bakery yeasts). Ions of HM (Pb, Cd and Cu) and pesticides (gamma-hexachlorocyclohexane, dichlorodiphenyl-trichloroethane and aldrin) are added into the wines at rates higher than maximum allowable concentrations. Then the wine has been treated by VS and OK at a dose of 1 gram/cubic decimeter. The mixture has been matured during 1 hour at normal temperature and constant intermixing. The biosorbents have been separated by centrifuging. Mass concentration of HM ions is determined by inverse voltammetry and pesticide content is done by gas-liquid chromatography. It is shown that OK and VS absorb effectively HM ions and cell walls has probably a significant role in HM sorbtion. Pesticide concentration also decreases greatly after wine treatment by biosorbents, particularly aldrin is not found completely. Thus, OK and VS can be used for removal HM ions and pesticide residues from wine products
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