Omar N B, Merroun M L, González-Muñoz M T, Arias J M
Departamento de Microbiología, Facultad de Ciencias, Universidad de Granada, Spain.
J Appl Bacteriol. 1996 Sep;81(3):283-7. doi: 10.1111/j.1365-2672.1996.tb04330.x.
Yeast cells are capable of carrying out biosorption with various heavy metals. The biomass deriving from Saccharomyces cerevisiae coming from brewing industries is a by-product that is possible to be used in the purification of water contaminated with these ions. In this paper we show that yeast biomass from one of the city's breweries can adsorb uranium efficiently, up to 2.4 mmol of this metal per gram of dry biomass. It can also be seen that the temperature (between 10 degrees and 37 degrees C) has no effect on the biosorption, while pH does have an influence, 4.5 being the best value. When the concentrations of uranium range between 0.1 and 0.5 mol l-1 the yeast dry biomass is capable of adsorbing between 84% and 98% of this metal in solution.
酵母细胞能够对各种重金属进行生物吸附。来自酿酒行业的酿酒酵母产生的生物质是一种副产品，可用于净化被这些离子污染的水。在本文中，我们表明来自该市一家啤酒厂的酵母生物质能够高效吸附铀，每克干生物质最多可吸附2.4 mmol这种金属。还可以看出，温度（在10摄氏度至37摄氏度之间）对生物吸附没有影响，而pH值确实有影响，最佳值为4.5。当铀的浓度在0.1至0.5 mol l-1之间时，酵母干生物质能够吸附溶液中84%至98%的这种金属。
