摘要
以MCM-41介孔分子筛为载体,浸渍硝酸钴并经焙烧后制得Co/MCM-41。采用Co/MCM-41强化零价铁/氧气体系处理反渗透浓水,去除其中的有机污染物,分别考察了反应时间、铁用量、进水pH、Co/MCM-41用量、反应温度等条件对反渗透浓水的COD和UV254的影响,通过正交试验得出:对于200mL废水,在反应时间0.5h、进水pH 5、铁用量5g、反应温度20℃、Co/MCM-41用量3g时,COD去除率最高,达到55.91%,其中反应时间为影响COD去除的最重要因素;在反应时间1.5h、进水pH 3、铁用量5g、反应温度20℃,Co/MCM-41用量4g时,UV254去除率最高,达到50.73%,其中进水pH为影响UV254去除的最重要因素。与零价铁/氧气体系单独处理反渗透浓水的实验结果相比,Co/MCM-41的加入起到了强化零价铁降解污染物能力的作用。
A Co/MCM-41 was prepared by calcination of MCM 41 mesoporous zeolite impregnated with cobalt nitrate to strengthen zero-valent iron/oxygen system for removing organic matters in reverse osmosis concentrate water. The reaction conditions including reaction time and temperature, initial pH of the water, iron dosage and Co/MCM-41 dosage were investigated to examine the removal rate of COD and UV254. The orthogonal experiment results show that the removal rate of COD is up to 55.91% un- der the conditions of 0.5 h, 20 ℃, initial water pH of 5, 5 g iron and 3 g Co/MCM-41. The reaction time is the most important factor affecting COD removal. Besides, the removal rate of UV254 reaches 50.73% under the conditions of 1.5 h, 20 ℃ and initial water pH of 3, 5 g iron and 4 g Co/MCM-41. The initial pH of the water to deal with is proved to be the most important factor affecting UV254 remov- al. Compared with the results of wastewater treated by iron scraps singly, it can be concluded that the presence of Co/MCM-41 plays an important role in strengthening the ability of zero-valent iron/oxygen system to degrade pollutants in the wastewater.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2014年第2期50-54,共5页
Petroleum Processing and Petrochemicals
基金
中央高校基本科研业务费专项资金资助(No.12CX06046A)
关键词
零价铁
氧气
反渗透浓水
介孔分子筛
金属钴
zero-valent iron
oxygen
reverse osmosis concentrate water
mesoporous zeolitemetal cobalt
