Flocculation performance of acrylamide modified konjac glucomannan
In order to prepare a novel flocculant with high efficiency for wastewater treatment,konjac glucomannan ether derivative(AMKGM)was synthesized under alkaline conditions using acrylamide as the etherifying agent via Michael addition reaction.The structure and morphology of AMKGM were characterized by Fourier transform infrared spectroscopy,proton nuclear magnetic resonance spectrometry,X-ray diffraction,thermogravimetric analyzer,and scanning electron microscope.Employing AMKGM as a new flocculant,its flocculation performance on montmorillonite solution was investigated,exploring the effects of flocculant mass fraction,flocculation time,flocculation temperature,and pH value as major factors.The research results indicate that the AMKGM flocculant was successfully prepared.When the flocculation time is 90 minutes and the mass fraction of the flocculant is 0.75%,good flocculation effects are observed for AMKGM under both acidic and alkaline conditions,with the highest flocculation efficiency reaching 98%.The reproducibility is excellent,and within the experimental temperature range,there is no significant influence on the flocculation performance of AMKGM.
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