摘要
利用环氧氯丙烷与三甲胺对废报纸纤维进行改性制备阴离子吸附材料(CWNF),通过傅里叶变换红外光谱(FT-IR)、扫描电镜(SEM)、能谱(EDS)、热重分析(TGA)、比表面积(BET)对改性前后废报纸纤维进行表征,并研究其去除水中六价铬离子Cr(VI)的性能.结果表明,改性后废报纸纤维(CWNF)对Cr(VI)的吸附能力显著提高.当CWNF投加量为1g/L,溶液p H为1时,对100mg/L Cr(VI)的最大吸附量为38.66mg/g,平衡时间为60min,比改性前废报纸纤维(WNF)的吸附量(24.18mg/g)提高了59.88%.Langmuir与Freundlich等温吸附方程均能较好地描述CWNF对Cr(VI)的吸附特性,吸附动力学更符合拟二级速率方程.
A novel quaternary amine-modified waste newspaper fiber （CWNF） was prepared with epichlorohydrin and trimethylamine and characterized by fourier transform infrared spectroscopy （FT-IR）, scanning electron microscopy （SEM）, EDS, thermogravimetric analysis （TGA） and BET surface area analysis. The adsorption property of CWNF for Cr （VI） from aqueous solution was studied. Results showed that the adsorption equilibrium time was about 60min, and the maximum adsorption capacity was 38.66mg/g at pH land increased about 59.88% compared to that of waste newspaper fiber （WNF） （24.18mg/g）. The adsorption of Cr （VI） on the CWNF was found to follow the pseudo-second-order kinetics equation and agree well with both Langmuir and Freundlich adsorption isotherm model.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2015年第5期1368-1374,共7页
China Environmental Science
基金
国家自然科学基金资助项目(21006037)
广东省自然科学基金项目(06300845)
关键词
废报纸纤维
化学改性
六价铬
吸附
waste newspaper fiber
chemical modification
Cr （VI）
adsorption
