title: [Study on the disposal process for removing heavy metal ions from wastewater by composite biosorbent of nano Fe3O4/Sphaerotilus natans].
abstract: Composite biosorbent nano Fe3O4/Sphaerotilus natans was prepared when nano Fe3O4 was used as carrier, then the composite biosorbent characterized by infrared instrument and investigated on adsorbing heavy metal ions from wastewater. Infrared spectrum analysis shows that--CONH--and--OH are principal activated groups of composite biosorbent. The experiment of adsorption shows that biomass concentration and flow velocity are main influencing factors. The composite biosorbent has best effect on the adsorption of Cu2+ under the conditions of biomass 1.5 g/L (Sphaerotilus natans/Fe3O4 = 3:2), flow velocity 0.96 L/h and initial concentration of Cu2+ was less than 20 mg/L. Composite biosorbent can be used for more 10 times when biosorbent was regenerated by HCl solution, and HCl solution can be used 3 times repeatedly. The selective sequence was Ph2+ > Cu2+ > Zn2+ > Cd2+.
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: Li-Wen
authors.initials: LW
authors.lastname: Wang
authors.forename: Rong
authors.initials: R
authors.lastname: Yin
authors.forename: Min
authors.initials: M
authors.lastname: Lu
authors.forename: Ying-Jun
authors.initials: YJ
authors.lastname: Yang
mesh_terms: D000327:Adsorption; D001673:Biodegradation, Environmental; D003300:Copper / Q000737:chemistry; D005290:Ferric Compounds / Q000737:chemistry; D007854:Lead / Q000737:chemistry; D019216:Metals, Heavy / Q000378:metabolism*; D053758:Nanoparticles; D042744:Sphaerotilus / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D015032:Zinc / Q000737:chemistry
chemical_list: D005290:Ferric Compounds; D019216:Metals, Heavy; D007854:Lead; D003300:Copper; D015032:Zinc