摘要
利用X射线衍射(XRD)和扫描电镜(SEM)方法,对木质纤维素/蒙脱土纳米复合材料的结构进行表征,并研究了溶液pH、Cr(Ⅵ)初始浓度、吸附时间和吸附温度对木质纤维素/蒙脱土纳米复合材料吸附Cr(Ⅵ)的影响。结果表明:(1)木质纤维素和蒙脱土复合后形成了插层-剥离型的纳米复合材料;(2)在溶液pH为2、Cr(Ⅵ)初始质量浓度为100mg/L、吸附温度为30℃、吸附时间为180min的条件下,木质纤维素/蒙脱土纳米复合材料对Cr(Ⅵ)的吸附量达5.72mg/g;(3)木质纤维素/蒙脱土纳米复合材料对Cr(Ⅵ)的吸附符合伪二级动力学模型和Freundlich吸附等温式。
The lignocellulose/montmorillonite （LNC/MMT） nanocomposite was produced in the lab for adsor- bing the Cr（Ⅵ ） in solution. The surface structure of LNC/MMT nanocomposite was characterized X-ray diffraction （XRD） and scanning electron microscopy（SEM）, and the effect of solution pH, initial Cr（ ⅥI ） concentration, adsorp- tion time and temperature on Cr（Ⅵ） adsorption capacity of LNC/MMT nanocomposite were investigated. Results showed that a new intercalated-exfoliated nanocomposites was formed after the composition process; when the solu- tion pH was 2,initial Cr（Ⅵ） concentration was 100 rag/L, the adsorption performed at 30 ℃ for 180 min, the adsorp- tion capacity of LNC/MMT nanocomposite for Cr（ Ⅵ） was 5.72 mg/g. The dynamic adsorption data could be well fit- ted by the pseudo-second-order and the Freundlich isotherm,respectively.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2013年第8期68-72,78,共6页
Environmental Pollution & Control
基金
国家林业公益性行业科研专项(No.201104004)
内蒙古自然科学基金资助项目(No.2012MS0606)
内蒙古自治区高等学校青年科技英才支持计划资助项目
