Performance of adsorption and desorption of Pb(II) by polyaspartic acid/lignocellulose hydrogels

被引：0

作者：

Ye M. ^{[1
]}

Wang L. ^{[1
]}

Du H. ^{[1
]}

机构：

[1] College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot

来源：

Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2016年 / 32卷 / 11期

关键词：

Adsorption; Desorption; Hydrogels; Lignocellulose; Pb(II); Polyaspartic acid;

D O I：

10.16865/j.cnki.1000-7555.2016.11.013

中图分类号：

学科分类号：

摘要：

The polyaspartic acid/Lignocellulose (PASP-LNC) hydrogels prepared were taken as adsorbent to research the adsorption and desorption properties of Pb(II), which were synthesized by polymerization in static solution of PASP and LNC. The effecting parameters on the Pb(II) adsorption capacity by changing initial concentration of Pb(II), solution pH value, adsorption time and adsorption temperature were studied in detail. The result show that the best adsorption capacity of PASP/LNC hydrogels for Pb(II) could be 978.35 mg/g under the condition, the initial concentration of Pb(II) is 0.04 mol/L, the solution pH value is 5.5, the adsorption time is 120 min and the adsorption temperature is 30℃. The pseudo-second-order kinetic model could well describe the whole adsorption process, and the isotherm adsorption equilibrium is conformed to the Langmuir model. The structure and adsorption mechanism of PASP/LNC were researched in combination with results of XRD, BET specific surface area and average pore, SEM and FT-IR. HNO3 was used to perform desorption of PASP/LNC. The results show that with the HNO3 concentration of 0.04 mol/L, desorption temperature of 30℃ and desorption time of 60 min, the satisfactory effect of desorption capability is 928.36 mg/g. The adsorption/desorption cycle experiment indicates that the adsorption capability of PASP/LNC is ideal for four cycles, so PASP/LNC is confired as a high efficient adsorbent for recycling. © 2016, Editorial Board of Polymer Materials Science & Engineering. All right reserved.

引用

页码：63 / 69

页数：6

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