功能化PS微球负载纳米零价Fe/Ni降解对硝基氯苯的研究
施陆凯, 王明贤, 李丽霞, 瞿文强, 郭晨欣, 张莎莎
江苏大学环境与安全工程学院, 江苏 镇江 212013
Reduction of p -nitrochlorobenzene under nano-scale zero-valent Fe/Ni supported by functionalized polystyrene microspheres
SHI Lu-kai, WANG Ming-xian, LI Li-xia, QU Wen-qiang, GUO Chen-xin, ZHANG Sha-sha
School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
摘要 以季胺化PS微球(PS-CH2 -N+ (C2 H5 )3 Cl- )为载体,吸附溶液中的Fe3+ 和Ni2+ ,用硼氢化钠还原氯制备负载型纳米零价Fe/Ni(PS-NZVFe/Ni),采用SEM、EDS、BET对其进行表征。以对硝基氯苯为目标物,考察了PS-NZVFe/Ni对目标物的催化还原脱氯效果,发现Ni/Fe质量比、PS-NZVFe/Ni质量、温度、溶液pH对降解反应均有影响。1.0 g PS-NZVFe/Ni(Ni/Fe质量比为2.0%)25℃下处理pH为3~7、250 mL浓度为250.3 mg/L的p -CNB水溶液,振荡速度为110 r/min,20 min时p -CNB转化率可达99.0%以上,90 min后p -CNB完全还原成苯胺。
关键词:
季胺化PS微球
纳米Fe/Ni
对硝基氯苯
吸附还原脱氯
Abstract: Firstly,quaternary aminated polystyrene microspheres (PS-CH2 -N+ (C2 H5 )3 Cl- ) are taken as the carrier to absorb Fe3+ and Ni2+ in the solution,and then chlorine in the microspheres is reduced by sodium borohydride to prepare the support type ano-scale zero-valent Ni/Fe catalyst (PS-NZVFe/Ni),which is then characterized by SEM,EDS and BET.Then p -nitrochlorobenzene (p -CNB) is taken as the target substance to determine catalytic reduction dechlorination effect of prepared PS-NZVFe/Ni.It is found that the mass ratio of Ni/Fe,PS-NZVFe/Ni dosage,temperature,solution pH all have impacts on reduction reaction.Under the conditions of 25℃,pH=3-7,the oscillation speed at 100 r·min-1 ,dosage of PS-NZVFe/Ni (Ni/Fe=2.0%) being 1.0 g and 250 mL of p -CNB aqueous solution with concentration of 250.3 mg·L-1 as object,the conversion rate of p -CNB can exceed 99.0% in 20 min,and reach 100% in 90 min.
Key words:
quarternary aminated PS microspheres
nano-scale Fe/Ni
p -nitrochlorbenzene
adsorption-reduction-dechlorination
收稿日期: 2017-03-26
出版日期: 2017-09-20
基金资助: 国家自然科学青年基金项目(51508233)
通讯作者:
王明贤(1963-),男,硕士,副教授,研究方向为区域环境及安全风险分析与应急救援体系研究,通讯联系人,mxwang@ujs.edu.cn
E-mail: mxwang@ujs.edu.cn
作者简介: 施陆凯(1991-),男,硕士研究生,研究方向为安全环境材料,786043745@qq.com
引用本文:
施陆凯, 王明贤, 李丽霞, 瞿文强, 郭晨欣, 张莎莎. 功能化PS微球负载纳米零价Fe/Ni降解对硝基氯苯的研究[J]. 现代化工, 2017, 37(9): 86-90.
SHI Lu-kai, WANG Ming-xian, LI Li-xia, QU Wen-qiang, GUO Chen-xin, ZHANG Sha-sha. Reduction of p -nitrochlorobenzene under nano-scale zero-valent Fe/Ni supported by functionalized polystyrene microspheres. Modern Chemical Industry, 2017, 37(9): 86-90.
链接本文:
http://www.xdhg.com.cn/CN/10.16606/j.cnki.issn0253-4320.2017.09.019
或
http://www.xdhg.com.cn/CN/Y2017/V37/I9/86
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