摘要
分别采用冷冻法、球磨法、水热法、球磨-冷冻法和球磨-水热法对凹凸棒石进行解聚,以解聚后的凹凸棒石为载体,负载纳米Fe/Ni降解水中的2,4-二氯酚,探究凹凸棒石的解聚对凹凸棒石负载纳米Fe/Ni降解水中2,4-二氯酚的增强作用。结果表明,单独采用球磨法或冷冻法对凹凸棒石解聚不明显。球磨-冷冻法解聚的凹凸棒石,其BET比表面积最大可达151.28 m^(2)·g^(-1),较未解聚前提高了21.87 m^(2)·g^(-1)。球磨-水热法起不到解聚凹凸棒石晶束的作用,反而会促进凹凸棒石二次团聚。以球磨-冷冻解聚的凹凸棒石负载纳米Fe/Ni降解2,4-二氯酚,在反应120 min时降解率可达99.9%,苯酚生成率为92.2%,较凹凸棒石负载纳米Fe/Ni分别提高了20.0%和38.3%,降解反应速率常数由0.01428 min^(-1)增至0.07806 min^(-1)。
Freezing,ball milling,hydrothermal,ball milling-freezing and ball milling-hydrothermal methods were respectively adopted to depolymerize attapulgite.The depolymerized attapulgite was used as the carrier,loaded with nano-Fe/Ni to degrade 2,4-dichlorophenol in water,and the enhancement effect of depolymerization of attapulgite on the degradation of 2,4-dichlorophenol in water was explored.The results showed that the depolymerization effect of attapulgite by ball milling or freezing method alone was not significant.The BET specific surface area of depolymerized attapulgite by ball milling-freezing method reached 151.28 m^(2)·g^(-1),which was 21.87 m^(2)·g^(-1) higher than that before depolymerization.The ball milling-hydrothermal method could not depolymerize attapulgite,but could promote the secondary agglomeration of attapulgite.Nano-Fe/Ni loading on attapulgite by ball milling-freezing depolymerization was used to degrade 2,4-dichlorophenol.When the reaction time was 120 min,the degradation rate reached to 99.9%and the yield of phenol was 92.2%,which were 20.0%and 38.3%higher than that of nano-Fe/Ni loading on attapulgite,respectively.The degradation rate constant increased from 0.01428 to 0.07806 min-1.
作者
王珺雯
刘红
石飞
范先媛
WANG Junwen;LIU Hong;SHI Fei;FAN Xianyuan(College of Resource and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan University of Science and Technology,Wuhan 430081,China;Environmental Protection Department,Sino Pharmengin Corporation,Wuhan 430223,China)
出处
《黑龙江大学自然科学学报》
CAS
2021年第3期310-316,共7页
Journal of Natural Science of Heilongjiang University
基金
国家自然科学基金重点资助项目(41230638)
湖北省环保厅科研项目(2017HB08)。
