[Removing Cr(VI) by composite biosorbent of nano FeO4/Sphaerotilus natans].
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.
Guan
Xiao-hui
XH
School of Chemistry Engineering, Northeast Dianli University, Jilin 132012, China. guanxh@mail.nedu.edu.cn
Qin
Yu-chun
YC
Qin
Yu-hua
YH
Yin
Rong
R
Sun
Mo-jie
MJ
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*
D005290:Ferric Compounds; D002857:Chromium; C000499:ferric oxide