Bioaccumulation of cadmium by growing Zygosaccharomyces rouxii and Saccharomyces cerevisiae.
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.
Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
Chunsheng
C
Li
Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
Wei
W
Jiang
Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
Ning
N
Ma
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.
Yinglian
Y
Zhu
Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
Xiaoyan
X
Dong
Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
Dongfeng
D
Wang
Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
Xianghong
X
Meng
Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China. Electronic address: xuying209@yahoo.com.
Ying
Y
Xu
D000704:Analysis of Variance; D002104:Cadmium / Q000032:analysis / Q000493:pharmacokinetics*; D003300:Copper; D005506:Food Contamination / Q000517:prevention & control*; D012441:Saccharomyces cerevisiae / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000493:pharmacokinetics*; D018508:Water Purification / Q000379:methods*; D015032:Zinc; D020068:Zygosaccharomyces / Q000378:metabolism*
D014874:Water Pollutants, Chemical; D002104:Cadmium; D003300:Copper; D015032:Zinc
Bioaccumulation; Cadmium; Saccharomyces cerevisiae; Tolerance; Zygosaccharomyces rouxii