摘要
以杭锦土、FeCl_3·6H_2O和NaBH_4为原料,采用液相还原法制备了杭锦土负载纳米零价铁(NZVI@HJ),扫描电镜和XRD表征结果显示纳米零价铁均匀分散在杭锦土上。对甲基橙模拟废水进行吸附降解实验,考察投加量、负载比、pH、初始浓度、温度等因素对NZVI@HJ降解甲基橙效果的影响。结果表明:在投加量为3 g/L、纳米零价铁与杭锦土的最佳负载比(质量比)为1∶3、pH为3.0、温度为25℃条件下反应10 min,NZVI@HJ对甲基橙的去除率达到97.77%。NZVI@HJ对甲基橙的降解过程遵循一级反应动力学规律。
Hangjin clay-supported nanoscale zero-valent iron（NZVI@HJ） has been synthesized by liquid phase reduction method,using Hangjin clay,FeCl_3·6H_2O and NaBH_4 as raw materials. The scanning electron microscopy and X-ray diffraction images of NZVI@HJ show that nanoscale zero-valent iron particles are evenly dispersed on the surface of Hangjin clay. The adsorption and degradation experiments of methyl orange（MO） simulated wastewater are conducted. The influences of factors,such as dosage,loading ratio,p H,initial concentration,temperature,etc. on the degradation effect of MO are investigated. The results show that when the dosage is 3 g/L,the optimum loading ratio（mass fraction） of zero-valent iron and Hangjin clay is 1 ∶3,pH =3.0,temperature is 25 ℃,and reaction time is10 min,the MO removing rate by NZVI@HJ is 97.77%. Furthermore,the MO degradation process by NZVI@HJ follows the first-order reaction kinetics rule.
出处
《工业水处理》
CAS
CSCD
北大核心
2015年第12期34-39,共6页
Industrial Water Treatment
基金
村镇环境综合整治重大科技工程(2012BAJ21B00)
关键词
杭锦土
纳米零价铁
甲基橙
脱色
Hangjin clay
nanoscale zero-valent iron
methyl orange
decolorization
