Liming effects on dissolved and colloid-associated transport of cadmium in soil under intermittent simulated rainfall

doi:10.1016/j.catena.2020.104727

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Liming effects on dissolved and colloid-associated transport of cadmium in soil under intermittent simulated rainfall
	Tang Xiang-Yu 1,2,4; Katou Hidetaka 4; Suzuki Katsuhiro 3
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2020
卷号	400 页码:104727
关键词	Column experiment Liming Colloid-facilitated transport Exchange selectivity
ISSN号	0304-3894
DOI	10.1016/j.catena.2020.104727
产权排序	1
文献子类	Article
英文摘要	Liming has been regarded as an effective measure to reduce the bioavailability and mobility of cadmium (Cd) in soil. However, its effect on Cd transport in colloid-associated form remains unclear. In this study, relative importance of dissolved and colloid-associated transport of Cd was explored in columns packed with moist soil aggregates (diameter < 2 mm) under intermittent simulated rainfall of distilled water or 5 mmol L-1 CaCl2 solution. The Cd2+/Ca2+ exchange selectivity coefficient determined in column experiments displayed gradual decreases with decreasing ionic strength. It is proposed that the exchange selectivity coefficient determined by repeated batch extraction can be used to predict Cd discharge in dissolved form in column effluent. Colloid-associated Cd was the main Cd form in the first flushing effluent sample upon resuming infiltration of distilled water. Otherwise, Cd was transported mainly in dissolved form, accounting for 81-93 % and 54-72 % of total Cd discharge for unlimed soils and limed soils, respectively. Liming remarkably reduced dissolved Cd concentration but only slightly enhanced colloidal Cd transport. Cd was enriched on colloids, and the enrichment factor was enhanced by liming. Colloidal Cd transport through preferential pathways (e.g., macropores, shrinkage cracks, tile drains) should be paid due attention.
电子版国际标准刊号	1872-6887
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46276]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Tang Xiang-Yu
作者单位	1.Key Laboratory of Mountain Surface Processes and Ecological regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; 2.State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China; 3.Central Region Agricultural Research Center, National Agriculture and Food Research Organization, Joetsu, 943-0193, Japan 4.Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, Tsukuba, 305-8604, Japan;
推荐引用方式 GB/T 7714	Tang Xiang-Yu,Katou Hidetaka,Suzuki Katsuhiro. Liming effects on dissolved and colloid-associated transport of cadmium in soil under intermittent simulated rainfall[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,400:104727.
APA	Tang Xiang-Yu,Katou Hidetaka,&Suzuki Katsuhiro.(2020).Liming effects on dissolved and colloid-associated transport of cadmium in soil under intermittent simulated rainfall.JOURNAL OF HAZARDOUS MATERIALS,400,104727.
MLA	Tang Xiang-Yu,et al."Liming effects on dissolved and colloid-associated transport of cadmium in soil under intermittent simulated rainfall".JOURNAL OF HAZARDOUS MATERIALS 400(2020):104727.