Ce-Mn复合氧化物对As(V)的吸附行为与机制

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室 > 近岸生态与环境实验室

	Ce-Mn复合氧化物对As(V)的吸附行为与机制
	张传巧 1; 陈静 2; 吴秋月 3; 张高生 4; 吴鹍 1
刊名	环境化学
	2020
卷号	39 期号:12 页码:3542-3551
关键词	Ce-Mn复合金属氧化物吸附机制
ISSN号	0254-6108
其他题名	Adsorption of As (V) on Ce-Mn binary oxide: Behavior and mechanism
文献子类	Article
英文摘要	A novel Ce-Mn binary oxide adsorbent was synthesized via oxidation and co-precipitation method. As(V) adsorption behavior on Ce-Mn bimetal oxide was systematically investigated by batch experiments. As(V) adsorption mechanism was studied using FTIR and XPS techniques. The results indicated that the introduction of manganese oxides into CeO_2 emerged a synergistic effect on As(V) adsorption,which was evidently proved by the much higher adsorption capacity of Ce-Mn bimetal oxide than that of the pure CeO_2 and MnO_2,especially at the Ce/Mn molar ratio of 3 ∶ 1. The adsorption of As(V) was relatively fast and over 90.8% of the equilibrium adsorption capacity was obtained within 4 h. Ce-Mn bimetal oxide had good performance for As(V) adsorption,especially under acidic conditions. The maximum adsorption capacity was 77.8,63.5 and 39.0 mg·g~(-1) at pH 5.0,7.0 and 9.0,respectively. Freundlich model was more suitable to describe the adsorption isotherm data. The ionic strength had little influence on the adsorption. The coexisting anions PO_4~(3-) and SiO_2-3 inhibited As(V) adsorption,whereas the cations Ca~(2+) and Mg~(2+) slightly enhanced As(V) adsorption. Mechanism investigations suggested that As(V) was probably removed from the solution by forming monodentate mononuclear and didentate dinuclear complexes on the surface of Ce-Mn bimetal oxide.
语种	中文
CSCD记录号	CSCD:6895324
资助机构	国家自然科学基金
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/30312]
专题	烟台海岸带研究所_近岸生态与环境实验室
作者单位	1.西安建筑科技大学环境与市政工程学院,西安710055; 2.中国科学院烟台海岸带研究所,中国科学院海岸带环境过程与生态修复重点实验室,烟台264003; 3.苏州科技学院环境科学与工程学院,江苏省环境功能材料重点实验室,苏州215009; 4.广州大学,珠江三角洲水质安全与保护教育部重点实验室,广州510006
推荐引用方式 GB/T 7714	张传巧,陈静,吴秋月,等. Ce-Mn复合氧化物对As(V)的吸附行为与机制[J]. 环境化学,2020,39(12):3542-3551.
APA	张传巧,陈静,吴秋月,张高生,&吴鹍.(2020).Ce-Mn复合氧化物对As(V)的吸附行为与机制.环境化学,39(12),3542-3551.
MLA	张传巧,et al."Ce-Mn复合氧化物对As(V)的吸附行为与机制".环境化学 39.12(2020):3542-3551.