title: Biosorption of Cu(2+), Pb(2+) and Cr(6+) by a novel exopolysaccharide from Arthrobacter ps-5.
abstract: The biosorption behaviors and mechanisms for Cu(2+), Pb(2+) and Cr(6+) by a novel exopolysaccharide (EPS) from Arthrobacter ps-5 have been studied in the paper. The influences of EPS concentration, solution pH and ionic strength on adsorption property were investigated. The EPS showed strong biosorption capability, up to 169.15mg/g of Cu(2+), 216.09mg/g of Pb(2+) and 84.47mg/g of Cr(6+), respectively. With the additional concentration of Ca(2+) and K(+) increased, the biosorption ability on Cu(2+), Pb(2+) and Cr(6+) decreased significantly and followed the order of K(+)<Ca(2+). Infrared spectrometry analysis demonstrated that the groups of OH, CO, COC and COC of the EPS involved in metal biosorption process were the main functional groups for binding metal ions.
authors.affiliation: School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Shuhong
authors.forename: Zhang
authors.initials: Z
authors.lastname: Meiping
authors.forename: Yang
authors.initials: Y
authors.lastname: Hong
authors.forename: Wang
authors.initials: W
authors.lastname: Han
authors.forename: Xiao
authors.initials: X
authors.lastname: Shan
authors.forename: Liu
authors.initials: L
authors.lastname: Yan
authors.forename: Wang
authors.initials: W
authors.lastname: Jihui
mesh_terms: D000327:Adsorption; D001173:Arthrobacter / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry / Q000302:isolation & purification; D003300:Copper / Q000737:chemistry / Q000302:isolation & purification; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000737:chemistry / Q000302:isolation & purification; D019216:Metals, Heavy / Q000737:chemistry* / Q000302:isolation & purification*; D009005:Monosaccharides / Q000032:analysis; D009994:Osmolar Concentration; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D002104:Cadmium; D003300:Copper; D007854:Lead; D019216:Metals, Heavy; D009005:Monosaccharides; D011135:Polysaccharides, Bacterial; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Arthrobacter; Biosorption; Exopolysaccharide; Metal ions