Preparation of modified lignin aerogel and its adsorption of molasses pigment
A novel chitosan aerogel(QACL)was prepared by free radical polymerization using alkaline lignin(SL),chitosan(CS)and polyvinyl imide(PEI)as raw materials.The morphology,structure and thermal properties of QACL adsorbent were observed and characterized by scanning electron microscopy,Fourier transform infrared spectrometer and thermogravimetric analyzer.The effects of changing reaction time,temperature,pH and adsorbent dosage on the absorption of molasses pigment were studied.The re-sults showed that the optimal conditions were pH 7,reaction temperature 60℃,reaction time 30 min and adsorbent dosage 1.1 g/L,the removal rate of molasses pigment by QACL reached94%,and the adsorp-tion capacity was 128.18 mg/g.
molassespigmentclarification and decolorizationadsorbent
NETL
NSTL
万方数据
