摘要
以凹凸棒石(Attapulgite, AT)和羧甲基纤维素钠(Sodium carboxymethyl cellulose, CMC-Na)为原料,采用溶液共混法制备了凹凸棒石/羧甲基纤维素钠复合材料。探讨了凹凸棒石和羧甲基纤维素钠质量比对复合材料吸附盐酸四环素的影响,结果表明,当凹凸棒石与羧甲基纤维素钠质量比为3∶ 20时,复合材料的吸附性能最佳,吸附量为132.59 mg/g。并利用傅里叶红外光谱(FT-IR)、X 射线衍射(XRD)、热重分析(TG)、扫描电子显微镜(SEM)和比表面积仪对复合材料进行了表征。考察了吸附时间、吸附温度和溶液pH 值对复合材料吸附盐酸四环素的影响,研究了其吸附过程。结果表明,当吸附温度为30 ℃、吸附时间为1.0 h、pH值为3时,吸附能力较大,为157.55 mg/g,复合材料对盐酸四环素的吸附过程符合Langmuir吸附等温式和准二级动力学模型。
The attapulgite/sodium carboxymethyl cellulose composite materials were prepared from attapulgite and sodium carboxymethyl cellulose by solution blending method. The effect of mass ratio of attapulgite and sodium carboxymethyl cellulose on adsorption capacity of the composites was investigated.The results show that when the mass ratio of attapulgite to sodium carboxymethyl cellulose is 3 ∶ 20,the adsorption capacity of the composite is the best and the adsorption capacity is 132. 59 mg/g. The composites are characterized by using Fourier transform infrared spectra( FTIR), X-Ray powder diffraction( XRD),thermogravimetric analysis( TG),scanning electron microscopy( SEM) and specific surface area. The effects of adsorption time,temperature and p H value on the removal of tetracycline hydrochloride from aqueous solution are investigated,and the mechanism and process of tetracycline hydrochloride adsorption are explored. The results show that when the adsorption temperature is 30 ℃,the adsorption time is 1. 0 h and pH value is 3,the maximum adsorption capacity of the composite is 157. 55 mg/g. There exist interaction between attapulgite and sodium carboxymethyl cellulose. The adsorption process accorded with Langmuir adsorption isotherm and quasi two stage kinetic model.
作者
胡盛
袁川
周红艳
冯驸
史伯安
胡卫兵
HU Sheng;YUAN Chuan;ZHOU Hong-yan;FENG Fu;SHI Bo-an;HU Wei-bing(Key Laboratory of Biologic Resources Protection and Utilization of Hubei Province,Hubei Minzu University,Enshi 445000,China;School of Chemical and Environment Engineering,Hubei Minzu University,Enshi 445000,China)
出处
《硅酸盐通报》
CAS
北大核心
2019年第6期1700-1706,共7页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(31460172,21767010)
恩施州科技计划项目(D20180027)
湖北民族学院博士启动基金(MY2017B023)
生物资源保护与利用湖北省重点实验室开放基金(PKLHB1709)
关键词
凹凸棒石
羧甲基纤维素钠
吸附
盐酸四环素
attapulgite
sodium carboxymethyl cellulose
adsorption performance
tetracycline hydrochloride
