功能化PS微球负载纳米零价Fe/Ni降解对硝基氯苯的研究  

Reduction of p-nitrochlorobenzene under nano-scale zero-valent Fe/Ni supported by functionalized polystyrene microspheres

作　　者：施陆凯 王明贤 李丽霞 瞿文强 郭晨欣 张莎莎 

机构地区：[1]江苏大学环境与安全工程学院,江苏镇江212013

出　　处：《现代化工》2017年第9期86-90,共5页Modern Chemical Industry

基　　金：国家自然科学青年基金项目(51508233)

摘　　要：以季胺化PS微球(PS-CH_2-N^+(C_2H_5)_3Cl^-)为载体,吸附溶液中的Fe^(3+)和Ni^(2+),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。Firstly,quaternary aminated polystyrene microspheres（ PS-CH2-N＋（ C2H5）3Cl-） 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-1as object,the conversion rate of p-CNB can exceed 99. 0% in 20 min,and reach 100% in 90 min.

关 键 词：季胺化PS微球 纳米Fe/Ni 对硝基氯苯 吸附还原脱氯 

分 类 号：X965[环境科学与工程—安全科学]