title: [Removing Cr(VI) by composite biosorbent of nano FeO4/Sphaerotilus natans].
abstract: The process of biosorption and the adsorbing mechanisms of Fe3 O4/Sphaerotilus natans to Cr(VI) were studied. The experiment results showed that pH value was main influencing factors on adsorption to Cr(VI). In the range of pH 2 to 3, the adsorbance of the composite biosorbent to Cr(VI) is 0.0217 mmol/g. The regeneration efficiency is 90% when the composite biosorbent was regenerated by HCl solution. --CONH2-- and --NH-- were principal activated groups of composite biosorbent. Cr(VI) can primarily combine with the surface of Fe3O4/Sphaerotilus natans by electrostatic attraction.
authors.affiliation: School of Chemistry Engineering, Northeast Dianli University, Jilin 132012, China. guanxh@mail.nedu.edu.cn
authors.forename: Xiao-hui
authors.initials: XH
authors.lastname: Guan
authors.forename: Yu-chun
authors.initials: YC
authors.lastname: Qin
authors.forename: Yu-hua
authors.initials: YH
authors.lastname: Qin
authors.forename: Rong
authors.initials: R
authors.lastname: Yin
authors.forename: Mo-jie
authors.initials: MJ
authors.lastname: Sun
mesh_terms: D001673:Biodegradation, Environmental; D019149:Bioreactors; D002857:Chromium / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism*; D005290:Ferric Compounds / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry; D042744:Sphaerotilus / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D005290:Ferric Compounds; D002857:Chromium; C000499:ferric oxide