【摘要】 采用了液相还原法制备膨润土负载纳米铁,分别考察了膨润土、纳米铁和负载纳米铁对1 L、100mg/L的甲基橙溶液的去除率,并探讨了时间、pH值、投加量、温度等对负载纳米铁去除水中甲基橙的影响.结果表明:在投加量为1.00 g/L、60 r/min、30℃、pH为6.00的条件下,负载纳米铁去除水中甲基橙在前20 min时效果最好且在10 min时达到89.73%,而纳米铁和膨润土分别仅为40.03%,2.10%;同时负载纳米铁对初始质量浓度为800 mg/L的甲基橙在60 min去除率达到了84.49%.此外,负载纳米铁对加标(100mg/L)实际废水中甲基橙的去除率达到99.75%,表明其对高浓度的染料废水负载纳米铁是一种潜在的环境修复材料.更多还原

【Abstract】 Bentonite supported nanoscale zero-valent iron particles(B-nZVI)was prepared under the liquid-phase reduction,and the removal efficiency of methyl orange(MO) in aqueous solution using bentonite,nanoscale zero-valent iron particles(nZVI)and B-nZVI was investigated and parameters were also discussed such as time,pH value,dosage,temperature and so on,which affected on the removal efficiency of methyl orange.The results showed that under the condition of dosage of 1.00 g/L,60 r/min,30 ℃,pH=6.00,the removal efficiency of MO in aqueous solution was the best to 89.73%,the first 20 min,while only 40.03% for nZVI and 2.10% for bentonite,respectively.Meanwhile the removal efficiency of MO in aqueous solution with the initial concentration of 800 mg/L using B-nZVI was to 84.49% after 60 min. In addition,the removal efficiency of MO in actual printing and dying wastewater with addition of 100 mg/L was to 99.75% using B-nZVI and it indicated that B-nZVI will be a kind of potential materials of environmental remediation for high concentration printing and dying wastewater.更多还原