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本文报告啤酒酵母废菌体对 Au3 +的吸附还原作用。该菌体在金离子起始浓度 2 0 0μg/ ml,菌体浓度2 mg/ ml,p H3 .0和 3 0℃的条件下 ,吸附 60 min,吸附量达 55.9mg/ g干菌体。 TEM观察结果表明 ,溶液中的Au3 +离子能被啤酒酵母废菌体吸附 ,并还原生成 Au0 颗粒。所生成的 Au0 颗粒能形成不同形状和大小的金晶体。吸附在 α- Fe2 O3 和 Si O2 上的 Au3 +离子也能被啤酒酵母废菌体还原形成纳米大小的金颗粒。
This article reports the adsorption and reduction of Au3 + by Saccharomyces cerevisiae waste cells. The bacterial cells were adsorbed for 60 min at the initial concentration of gold ions of 200 μg / ml, cell concentration of 2 mg / ml, pH3.0 and 30 ℃, and the adsorption capacity reached 55.9 mg / g. TEM observation results show that the Au3 + ions in the solution can be adsorbed on the waste yeast body of Saccharomyces cerevisiae and reduced to form Au0 particles. The generated Au0 particles can form gold crystals with different shapes and sizes. Au3 + ions adsorbed on α-Fe2 O3 and Si O2 can also be reduced by Saccharomyces cerevisiae waste cells to form nano-sized gold particles.