腐殖酸作用下酸性多孔介质中纳米TiO_2的迁移与滞留机制

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

	腐殖酸作用下酸性多孔介质中纳米TiO_2的迁移与滞留机制
	张瑞昌 ; 章海波 ; 涂晨 ; 骆永明
刊名	中国环境科学
	2018-09-20
卷号	38 期号:09 页码:3542-3551
关键词	纳米TiO2 titanium dioxide nanoparticles fulvic acid 富里酸 humic acid stability 胡敏酸 transport 稳定性迁移性
ISSN号	1000-6923
其他题名	Mechanisms of mobility and retention of nano-TiO_2 in acidic porous media in the presence of humus acids
产权排序	(1)河南科技大学化工与制药学院 ; (2)中国科学院南京土壤研究所中国科学院土壤环境与污染修复重点实验室 ; (3)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
英文摘要	The mechanisms of mobility and retention of titanium dioxide nanoparticles (nTiO_2) in well-defined porous media composed of clean quartz sand in the presence of fulvic acid (FA) and humic acid (HA) were studied under acidic conditions.nTiO_2 were immobile in the porous media in the absence of FA and HA at pH 4.0.FA and HA could be adsorbed onto the surface of nTiO_2,change the electrokinetic properties of nTiO_2,and facilitate the transport of nTiO_2.The elution of nTiO_2 increased from 0.01 and 0.88 to 0.91 and 0.94 with the increase of FA and HA from 1mg/L to 10mg/L respectively.Compared to FA,more HA was adsorbed onto nTiO_2,and thus the facilitated effect of HA on transport of nTiO_2 was stronger.Ions inhibited the mobility of nTiO_2,and the effect of CaCl_2 was greater than that of NaCl in same concentration.The mobility of nTiO_2 was better in the presence of HA than FA.In addition,7%~56% nTiO_2 was deposited in the secondary energy minimum well in the presence of HA,higher than 4%~17% in the presence of FA,which could be easily released when the environmental conditions changed.High energy barriers between nTiO_2 and quartz promoted the mobility of nTiO_2,while a combination of the secondary minimum energy,straining,diffusion and gravitational deposition were involved in the retention of nTiO_2.
语种	中文
CSCD记录号	CSCD:6328737
资助机构	国家自然科学基金项目#41171248 ; 国家自然科学基金项目#41601520
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/24673]
专题	烟台海岸带研究所_近岸生态与环境实验室烟台海岸带研究所_污染过程与控制实验室烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位	1.河南科技大学化工与制药学院; 2.中国科学院南京土壤研究所中国科学院土壤环境与污染修复重点实验室; 3.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
推荐引用方式 GB/T 7714	张瑞昌,章海波,涂晨,等. 腐殖酸作用下酸性多孔介质中纳米TiO_2的迁移与滞留机制[J]. 中国环境科学,2018,38(09):3542-3551.
APA	张瑞昌,章海波,涂晨,&骆永明.(2018).腐殖酸作用下酸性多孔介质中纳米TiO_2的迁移与滞留机制.中国环境科学,38(09),3542-3551.
MLA	张瑞昌,et al."腐殖酸作用下酸性多孔介质中纳米TiO_2的迁移与滞留机制".中国环境科学 38.09(2018):3542-3551.