Co/MCM-41强化零价铁/氧气体系处理炼化企业反渗透浓水研究

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中的有机物，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去除率的影响，通过正交试验得出：对于200 mL废水，在反应时间 0.5 h、进水pH 5、铁用量 5 g、反应温度 20 ℃、Co/MCM-41用量 3 g时，COD去除率最高，达到54.0%，其中反应时间为影响COD去除的最重要因素；在反应时间1.5 h、进水pH 3、铁用量 5 g、反应温度 20 ℃，Co/MCM-41用量 4 g 时，UV254去除率最高，达到50.7 %，其中进水pH为影响UV254去除的最重要因素。与零价铁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。

STUDY ON TREATMENT OF REVERSE OSMOSIS CONCENTRATE WATER BY Co/MCM-41 STRENGTHENING ZERO-VALENT IRON/OXYGEN SYSTEM

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 54 % under the conditions of 0.5 h, 20 ℃, initial water pH of 5, 5g 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 50.7 % 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 removal. 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.