[Study on the disposal process for removing heavy metal ions from wastewater by composite biosorbent of nano Fe3O4/Sphaerotilus natans].
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+.
Guan
Xiao-Hui
XH
School of Chemistry Engineering, Northeast Dianli University, Jilin 132012, China. guanxh@mail.nedu.edu.cn
Qin
Yu-Chun
YC
Wang
Li-Wen
LW
Yin
Rong
R
Lu
Min
M
Yang
Ying-Jun
YJ
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
D005290:Ferric Compounds; D019216:Metals, Heavy; D007854:Lead; D003300:Copper; D015032:Zinc