炼化废水中芳香族有机污染物的吸附去除机制  

Adsorption mechanism of aromatic organic pollutants in refinery wastewater

作　　者：卫玉磊 赵卫光 WEI Yu-lei;ZHAO Wei-guang(Petrochina Guangxi Petrochemical Company,Qinzhou 535008,China)

机构地区：[1]中国石油广西石化公司,广西钦州535008

出　　处：《化学工程师》2022年第7期47-50,共4页Chemical Engineer

基　　金：钦州市科技局科技攻关项目(20QZKJGG0142)。

摘　　要：本文根据炼化废水特点,选取石油炼制过程中催化裂化车间的实际废水为研究对象,以沸石为吸附剂。通过设置经不同浓度的CuSO_(4)溶液预浸、不同温度的高温电阻炉煅烧、不同时间3个水平因素,通过单一变量法制备了15组沸石,分别用这些沸石处理苯酚初始浓度为5.3mg·L^(-1)的炼化废水,根据试验结论筛选出对苯酚吸附效果最好的改性条件组合。根据试验结论重新制备出了改性沸石,并根据相同的试验步骤进行了改性沸石对苯酚的吸附,对沸石改性前后的材料进行了SMS扫描电镜分析。得出以下结论:(1)对苯酚吸附效果最好的沸石改性条件组合为:CuSO_(4)浓度0.3mol·L^(-1),煅烧温度300℃,煅烧时间2h。(2)改性沸石对炼化废水中苯酚的吸附率为69.7%,比原始未经处理的沸石吸附率提高48.4%。(3)改性后的沸石具有较大的比表面积和孔隙。According to the characteristics of refining wastewater,this paper selects the actual wastewater of the catalytic cracking workshop in the petroleum refining process as the research object,and uses zeolite as the adsorbent.15 groups of zeolites were prepared by a single variable method by setting three levels of factors,namely,presoaking with copper sulfate solutions of different concentrations and calcination in high temperature resistance furnaces at different temperatures for different times.For the refinery wastewater,the combination of modification conditions with the best phenol adsorption effect was selected based on the experimental conclusions.The modified zeolite was re-prepared according to the experimental conclusions,and the adsorption of phenol by the modified zeolite was carried out according to the same test procedure.The materials before and after the modification of the zeolite were analyzed by SMS scanning electron microscope.The following conclusions are drawn:(1)The combination of zeolite modification conditions with the best phenol adsorption effect is:copper sulfate concentration 0.3mol·L^(-1),calcination temperature 300℃,calcination time 2h.(2)The adsorption rate of modified zeolite to phenol in refinery wastewater is 69.7%,which is 48.4%higher than that of the original untreated zeolite.(3)The modified zeolite has a larger specific surface area and pores.

关 键 词：炼化废水 沸石 苯酚 去除率 

分 类 号：X703[环境科学与工程—环境工程]