期刊论文

Thermodynamic and kinetic study on removal of Pb(Ⅱ)by carbon nanotubes-green nano zero valence iron(nZVI)composites

中文

应用化工

1671-3206

2020

49

8

2029-2034,2055

10.16581/j.cnki.issn1671-3206.20200611.034

国家自然科学基金青年基金资助项目（51304122）； 南华大学“青年英才”人才支持计划资助项目（南华政发[2014]49号）；

本校为第一机构

使用新鲜向日葵提取液、硫酸亚铁、多壁碳纳米管(MWCNT)等3种原料制备碳纳米管-绿色纳米铁复合材料(N-Fe/CNT),研究pH、不同浓度阴阳离子及反应时间对N-Fe/CNT吸附Pb(Ⅱ)的影响。结果表明,当pH=6时,吸附效果最佳为94.7%;Ca~(2+)、Mg~(2+)、SO_4~(2-)和CO_3~(2-)对实验均有一定影响,主要原因是溶液中有沉淀生成,影响反应。等温吸附方程Freundlich能更好描述N-Fe/CNT对Pb(Ⅱ)的吸附过程,吸附容量Q_(max)=15.02mg/g;热力学研究表明,焓变ΔH 0,吉布斯自由能ΔG

Using fresh sunflower extract,ferrous sulfate(FeSO_4·7H_2O)and multi-walled carbon nanotube(MWCNT)N-Fe/CNT to prepare carbon nanotubes-green iron nanoparticles composites(N-Fe/CNT).Study pH,different concentration of anionic and cationic and the reaction time on N-Fe/CNT adsorption Pb(Ⅱ)effect.The results showed that when pH=6,the adsorption effect is best,94.7%;Ca~(2+),Mg~(2+),SO_2-4 and CO_2 -3 all have certain effects on the experimental effects,mainly due to the formation of precipitation in solution,which affects the reaction.Experiments...