三辛胺改性活化蛭石对萘磺酸基废水的吸附性能研究  

Adsorption Property of TOA Modified Activated Vermiculite on Naphthalene Sulfonic Acid Wastewater

作　　者：张若洁 钱玉鹏[1,2] 李鲁笑 陈彬 ZHANG Ruojie;QIAN Yupeng;LI Luxiao;CHEN Bin(School of Resources and Enviromental Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Provincial Key Laboratory of Mineral Resources Processing and Environment,Wuhan 430070,China)

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]矿物资源加工与环境湖北省重点实验室,武汉430070

出　　处：《硅酸盐通报》2022年第4期1328-1335,共8页Bulletin of the Chinese Ceramic Society

基　　金：矿物资源加工与环境湖北省重点实验室基金(ZHJJ202005)。

摘　　要：蛭石具有良好的吸附性、离子交换性能,在废水处理中有广泛的应用前景。天然蛭石由于层间存在大量亲水性无机阳离子,使矿物表面被一层薄的水膜包围,对有机物吸附能力较弱。为提高蛭石对萘磺酸基有机物的处理能力,本文通过酸活化预处理天然蛭石,以三辛胺(TOA)为有机改性剂对蛭石进行负载,制备TOA改性活化蛭石(TOA-Hts),使蛭石同时具有吸附-萃取双重性能。利用XRD、FT-IR和BET等方法对其进行表征,并研究了溶液pH值、TOA-Hts投加量对吸附性能的影响,分析了TOA-Hts吸附机理。结果表明,废水中的R′SO_(3)^(-)主要是与TOA发生络合萃取反应吸附在TOA-Hts上,TOA-Hts比蛭石原矿对萘磺酸基废水的去除率提高90.63%,吸附量达到78.98 mg·g^(-1),吸附过程符合Freundlich热力学模型和准二级动力学模型。Vermiculite is widely used in the field of wastewater treatment due to its good adsorption and ion exchange properties.A large number of hydrophilic inorganic cations are filled between the layers of natural vermiculite,which produce a thin water film on the mineral surface and reduce its organic wastewater adsorption capacity.To improve the adsorption ability of vermiculite for naphthalene sulfonic acid,natural vermiculite was pretreated using acid activation,and then modified by trioctylamine(TOA)to prepare TOA modified acid-activated vermiculite(TOA-Hts),which possessed the vermiculite with adsorption and extraction properties.The prepared samples were characterized by XRD,FT-IR and BET methods.The influence of solution pH value and TOA-Hts dosage on the adsorption performance was studied,and the adsorption mechanism of TOA-Hts was analyzed.The results show that,the R′SO_(3)^(-) ions in wastewater are majority adsorbed on TOA-Hts by complex extraction reaction with TOA.Compared with natural vermiculite,the naphthalene sulfonic acid removal rate of TOA-Hts is increased by 90.63%,and the adsorption quantity reaches 78.98 mg·g^(-1).The adsorption process can be described by the Freundlich model and pseudo-second-order kinetics model.

关 键 词：活化蛭石 萘磺酸 三辛胺 废水处理 吸附 萃取 酸活化 

分 类 号：X703[环境科学与工程—环境工程]