期刊文献

Sorption of heavy metals by natural biopolymers 收藏

天然生物聚合物吸附重金属
原文求助 发布源
作者
Natalya V Efimova; Alla P Krasnopyorova; Galina D Yuhno; Anastasia A Scheglovskaya
作者单位
V.N. Karazin Kharkiv National University, Ukraine, Corresponding Author: Alla P Krasnopyorova, V.N. Karazin Kharkiv National University, sq. Svobody 4, Kharkiv 61022, Ukraine. Email: alla.p.krasnopyorova@karazin.ua
关键词
Sorbents; sorption materials; modified lignin; purification of potable and industrial water; Cu2+; Zn2+; Ni2+; Co2+ ions
关键词译文
吸附剂;吸附材料;改性木质素;饮用和工业用水的纯化; Cu 2 + ; Zn 2 + ; ni 2 + ; CO 2 + 离子
发布日期
April 25, 2017
页码
595-601
来源信息
Adsorption Science & Technology ISSN：0263-6174, 2017年, 35卷, 7-8期, 595-601页
摘要
The sorption properties of modified hydrolysis lignin towards Cu2+, Zn2+, Ni2+, Co2+ ions in the pH range from 2 to 8 at temperature of 298.15 K solution are studied. The analysis of kinetic curves of ions sorption on modified lignin at pH 7 shows that sorption equilibrium in heterogenic system ion–metal–sorbent is attained in 30–60 min. Obtained results indicate good equilibrium kinetic properties of sorbent. Supposed that reaction between sorbate and functional group of sorbent are the second-order reaction and they interact between each other in ratio 1:1. The character of the obtained electrokinetic curve suggests that the zeta potential of modified lignin strongly depends on the pH. The dependencies of cations metals sorption coefficients on the pH value of water phase are S-shaped. Maximal extraction of studied cations is observed at pH values of equilibrium solutions close to neutral ones.
摘要译文
研究了在298.15 K溶液温度下，水解木质素对Cu2 +，Zn2 +，Ni2 +，Co2 +离子在pH范围2〜8的吸附性能。离子吸附对pH 7的修饰木质素的动力学曲线的分析表明，异构体系离子金属吸附剂中的吸附平衡在30-60分钟内达到。获得的结果表明吸附剂具有良好的平衡动力学性质。假设山梨酸与吸附剂官能团之间的反应是二级反应，它们之间以1:1的比例相互作用。所获得的电动曲线的特征表明改性木质素的ζ电位强烈依赖于pH。阳离子金属吸附系数对水相pH值的依赖性为S形。在接近中性的平衡溶液的pH值下观察到所研究的阳离子的最大提取。
Natalya V Efimova; Alla P Krasnopyorova; Galina D Yuhno; Anastasia A Scheglovskaya. Sorption of heavy metals by natural biopolymers[J]. Adsorption Science & Technology, 2017,35(7-8): 595-601