摘要
通过将烯丙基磺酸钠(SAS)和硅烷偶联剂接枝到空心玻璃微珠表面,制备出新型空心玻璃微珠基吸附剂(KNH-g-PSAS)并采用扫描电子显微镜,能量分散光谱,X射线光电子能谱,傅里叶变换红外光谱,热重分析和X射线衍射仪等对其进行了充分的表征,显示了SAS的成功接枝.此外,系统地研究了溶液的pH值,接触时间,初始浓度和温度对KNH-g-PSAS吸附阳离子染料的影响.准二级动力学模型和Langmuir等温线模型分别很好地描述了吸附动力学和吸附等温线,表明吸附是发生在吸附剂表面且均匀的单层吸附.吸附实验表明,在最佳条件下,KNH-g-PSAS对碱性品红、金胺O、结晶紫和孔雀石绿的吸附能力分别为2247.19mg/g,2317.46mg/g,2557.54mg/g,2808.98mg/g.KNH-g-PSAS具有出色的自上浮性能和回收表现.
A noval hollow glass bead-based adsorbent(KNH-g-PSAS)was successfully fabricated by grafting sodium allyl sulfonate(SAS)and silane coupling agent onto the surface of hollow glass beads.KNH-g-PSAS was characterized by scanning electron microscope,energy dispersion spectroscopy,X-ray photoelectron spectroscopy,Fourier transform infrared spectroscopy,thermogravimetric analysis and X-ray diffractometer,showing the successful grafting of SAS.In addition,the effects of pH value,reaction time,initial concentration and temperature on the adsorption of cationic dyes by KNH-g-PSAS were systematically studied.The pseudo-order kinetic model and Langmuir isotherm model fitted the kinetics and isotherm data well,indicating that the adsorption were determined by chemsorption and uniform monolayer adsorption.Adsorption experiment showed that the adsorption capacity of KNH-g-PSAS for basic fuchsin,auramine O,crystal violet and malachite green were 2247.19 mg/g,23174.61 mg/g,2557.54 mg/g and 2808.98 mg/g,respectively.In addition,KNH-g-PSAS had excellent self-floating performance and recovery performance.
作者
郑怀礼
刘旺清
安延严
陈伟
孙强
万鑫源
赵瑞
ZHENG Huai-li;LIU Wang-qing;AN Yan-yan;CHEN Wei;SUN Qiang;WAN Xin-yuan;ZHAO Rui(Faculty of Environment and Ecology,Chongqing University,Chongqing 400044,China;Faculty of Civil Engineering,Sichuan Agricultural University Chengdu 611830,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2021年第11期5177-5186,共10页
China Environmental Science
基金
国家自然科学基金资助项目(21677020)
重庆市技术创新与应用示范专项重点研发项目(cstc2018jszx-zdyfxm X0002)。
关键词
染料吸附
接枝共聚
Π-Π堆积
静电相互作用
氢键
dye adsorption
graft copolymerization
π-πstacking
electrostatic interaction
hydrogen bonding
