Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China; College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China.
Bioresour Technol. 2014 Mar;155:116-21. doi: 10.1016/j.biortech.2013.12.098. Epub 2013 Dec 30.
Bioaccumulation via growing cells is a potential technique for heavy metal removal from food materials. The cadmium bioaccumulation characteristics by growing Zygosaccharomyces rouxii and Saccharomyces cerevisiae were investigated. Z. rouxii displayed powerful cadmium removal ability at low cadmium concentrations, which mainly depended on the intracellular cadmium bioaccumulation. The percentage of intracellular cadmium bioaccumulation of both yeasts obviously decreased with the increase of initial biomass and cadmium concentrations. Low pH and elevated concentrations of zinc and copper significantly decreased the intracellular cadmium bioaccumulation of both yeasts but improved the cadmium tolerance and the cell-surface cadmium bioaccumulation of Z. rouxii. Cadmium removal of Z. rouxii was improved by zinc and copper conditionally. Z. rouxii that possessed more powerful cadmium tolerance and removal ability at low pH and high concentration of competing ions can be developed into a potential cadmium removal agent using in complex food environment in future.
通过生长细胞进行生物累积是从食物材料中去除重金属的一种潜在技术。研究了生长的鲁氏接合酵母和酿酒酵母对镉的生物累积特性。在低镉浓度下，鲁氏接合酵母表现出强大的镉去除能力，这主要取决于细胞内镉的生物累积。两种酵母的细胞内镉生物累积百分比随着初始生物量和镉浓度的增加而明显降低。低 pH 值和高浓度的锌和铜会显著降低两种酵母的细胞内镉生物累积，但会提高鲁氏接合酵母的镉耐受性和细胞表面镉生物累积。锌和铜条件下可提高鲁氏接合酵母的镉去除率。在低 pH 值和高竞争离子浓度的复杂食物环境中，未来可能会将具有更强镉耐受性和去除能力的鲁氏接合酵母开发为一种潜在的镉去除剂。
