期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 5, 期 6, 页码 5108-5117出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b00472
关键词
Phosphorylated cellulose microspheres; Lead ions; Batch adsorption; Fixed-bed column
资金
- National Natural Science Foundation of China [51303142]
- Science and Technology Program of Guangdong Province [2015A010105018]
- Natural Science Foundation of Hubei Province [2014CFB775]
- Open Foundation of Collaborative Innovation Center of Wuhan Institute of Technology [P201109]
- Graduate Innovative Fund of Wuhan Institute of Technology [CX2015067]
A highly effective adsorbent with phosphate groups bound to cellulose microspheres was designed by an improved solid-phase modification method to adsorb lead ions from water by a batch and fixed-bed column method. The phosphorylated cellulose microsphere adsorbents were prepared through esterification by which phosphate groups were introduced to the interface of regenerated cellulose microspheres which were previously prepared through a sol-gel transition process from a simple cellulose solution. Their morphological, structural, and physicochemical properties were characterized by SEM, FTIR, XRD, and DSC, etc. Furthermore, EDX and XPS were used to confirm the chemical modification process and to investigate their phosphate adsorption mechanism. In the batch adsorption experiments, the equilibrium time and adsorption capacity were determined by both equilibrium and kinetic adsorption experiments, which were also conducted to investigate the adsorption mechanism. In the dynamic adsorption experiments, multiple operation conditions such as flow rate, initial concentration, bed height, and pH were evaluated, and the experiment data were fitted to several dynamic adsorption models, such as Adams-Bohart, Thomas, Yoon-Nelson, Bed Depth Service Time (BDST), and Dose Response, to study the performance of adsorption of Pb2+ onto the adsorbents. The results suggested that chemical adsorption was the main controlled process during the adsorption process and that the adsorbents could highly effectively capture Pb2+ from water via chelation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据