期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 26, 页码 7729-7737出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta11124e
关键词
-
资金
- Project of the National Development and Reform Commission (NDRC) [Q5009001201202]
- Science and Technology Program of Jilin Province [120301GX01013535]
- National Natural Science Foundation of China [51225402]
alpha-Fe2O3 nanowires deposited diatomite was prepared using a precipitation-deposition method with FeCl3 as metal source and (NH2)(2)CO aqueous solution as precipitating agent. Physicochemical properties of the samples were characterized by means of numerous techniques, and their efficiency for the removal of As(III) and As(V) was determined. It is found that the solution pH value, reaction temperature, reaction time, and FeCl3 concentration had effects on the alpha-Fe2O3 amount loaded on the diatomite. Parameters, such as adsorbent amount, adsorption time, adsorption temperature, pH value, and initial As(III) or As(V) concentration, could influence the As(III) or As(V) removal efficiency of the alpha-Fe2O3 nanowires/diatomite sample (prepared with a 8 wt% FeCl3 aqueous solution at pH = 4.5 and 50 degrees C for 35 h) for the removal of As(III) and As(V). Over the alpha-Fe2O3/diatomite sample at pH = 3.5, the maximal As(III) and As(V) adsorption capacities were 60.6 and 81.2 mg g(-1), and the maximal As(III) and As(V) removal efficiency was 99.98 and 100%, respectively. The Langmuir model was more suitable for the adsorption of As(V), whereas the Freundlich model was more suitable for the adsorption of As(III). The adsorption mechanism of the sample was also discussed.
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