期刊
CARBOHYDRATE POLYMERS
卷 196, 期 -, 页码 376-384出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.05.015
关键词
Aerogel; Electrostatic combination; Shape memory; Heavy metal; Adsorbent
资金
- National Key Research and Development Program of China [2017YFD0601005]
- Natural Science Foundation of Jiangsu Province [BK20171450]
- National Natural Science Foundation of China [31370583, 31470599, 31770607]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
This study describes the preparation of an aerogel adsorbent based on nanofibrillated cellulose(NFC) and polyethyleneimine(PEI) via electrostatic combination without chemical crosslinking. Purely physical cross-linking between NFC and PEI was confirmed by attenuated total refraction-Fourier transform infrared spectroscopy (ATR-FTIR) and thermogravimetric analysis (TGA). The NFC/PEI hybrid aerogels exhibited good structural stability and shape recovery in water. Absorption experiment shows that the hybrid aerogels are excellent adsorbents for the removal of heavy metal ions owing to the highly porous structure and the existence of plenty of amine groups. Thermodynamic and kinetic study showed pseudo-second-order equation and Langmuir model (R-2 > 0.999) as the best fit. The maximum adsorption capacity of Cu(II) and Pb(II) according to Langmuir model was 175.44 mg/g and 357.44 mg/g, respectively. Besides, the Cu(II) or Pb(II) loaded NFC/PEI aerogel could be easily regenerated by EDTA and retain the adsorption capacity after repeatedly using. This environmentally friendly hybrid aerogels with high-performance are promising candidates for sewage disposal and metal pollution treatment.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据