title: Effects of carbohydrate sources on biosorption properties of the novel exopolysaccharides produced by Arthrobacter ps-5.
abstract: The crude exopolysaccharides (EPSs) were obtained from Arthrobacter ps-5 fermentation using various carbohydrate sources followed by centrifugation, ethanol precipitation, and the isolated EPSs were further deproteinized and lyophilized. Carbohydrates from various sources resulted in different yield of EPSs from the fermentation and different molecular weight of EPSs. A maximum yield of 0.27 mg/g was achieved by using the culture medium supplemented with sucrose. The EPS produced by glucose-supplemented medium had the maximum content of acidic polysaccharides, subsequently presented the highest biosorption capacity for Cu(2+) and Pb(2+) at 257.9 mg/g and 331.8 mg/g, respectively. The ratio of acidic to neutral polysaccharides presented in EPSs was a key factor to explicate the biosorption mechanism, the higher the ratio, the stronger the biosorption capacity.
authors.affiliation: School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
authors.forename: Shuhong
authors.initials: S
authors.lastname: Ye
authors.affiliation: School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
authors.forename: Zhiyang
authors.initials: Z
authors.lastname: Ma
authors.affiliation: School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
authors.forename: Zhaofang
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Jiangsu Heavy Responsibility Group, Pizhou 221300, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
authors.forename: Meiping
authors.initials: M
authors.lastname: Zhang
authors.affiliation: School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China. Electronic address: bzixing@163.com.
authors.forename: Jihui
authors.initials: J
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D001173:Arthrobacter / Q000378:metabolism*; D002244:Carbon / Q000378:metabolism; D003300:Copper / Q000737:chemistry; D003470:Culture Media / Q000737:chemistry; D005285:Fermentation; D007854:Lead / Q000737:chemistry; D008670:Metals / Q000737:chemistry; D008970:Molecular Weight; D009005:Monosaccharides / Q000032:analysis; D011135:Polysaccharides, Bacterial / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism; D017550:Spectroscopy, Fourier Transform Infrared; D013395:Sucrose / Q000378:metabolism
chemical_list: D003470:Culture Media; D008670:Metals; D009005:Monosaccharides; D011135:Polysaccharides, Bacterial; D007854:Lead; D013395:Sucrose; D002244:Carbon; D003300:Copper
keywords: Arthrobacter ps-5; Biosorption; Carbohydrate-supplemented medium; Exopolysaccharide