Roles of Mg-Al layered double hydroxides and solution chemistry on P transport in soil

doi:10.1016/j.cej.2019.05.083

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Roles of Mg-Al layered double hydroxides and solution chemistry on P transport in soil
	Jiang, Xiaoqian 1,2; Zhang, Miaoyue 3,4; Yan, Binggang 5; Hu, Jiawei 5; Chen, Jiayu 1,2,6; Guan, Yuntao 1,2,6
刊名	CHEMICAL ENGINEERING JOURNAL
	2019-10
卷号	373 页码:1111-1119
关键词	Phosphorus Soil Layered double hydroxides Cation exchange Breakthrough curves Retention profiles
ISSN号	1385-8947
DOI	10.1016/j.cej.2019.05.083
英文摘要	Mg-Al layered double hydroxides (LDHs) were synthesized and applied to soils to control phosphorus (P) loss. Saturated soil column experiments and numerical modeling were conducted to investigate the transport, retention, and release behavior of P in natural soil with and without mixing LDHs under various solution chemistries. Retention of P in the soil increased with the addition of 0.5% LDHs and in the presence of Ca2+ in comparison to K+. The simulated results showed that irreversible retention of P is greater in the presence of Ca2+ than K+ in soil without LDHs and in the presence of 0.5% LDHs in comparison to the absence. The increase of ionic strength (IS) for K+ from 1 to 100mM resulted in increased P retention in LDH-soil system due to more inner-sphere complexes and increased adhesive force. Near equilibrium retention on the reversible site occurred for all these experiments. The P was desorbed and the transport of dissolved P was improved with the reduction of IS in the presence of K+. On the other side, larger ion exchange and reduction of IS in the presence of Ca2+ induced the release of Fe/Al oxides which brought transport of P absorbed on those minerals, suggesting the potential for Fe/Al oxides-facilitated transport of P under the change of soil solution chemistry. Additionally, the transport and stability of LDHs in soil column were also investigated. The dissolution and transport of LDHs could be impeded in presence of high cation valence and IS.
资助项目	Shenzhen Science and Innovation Commission[JSGG20170412145935322]
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000471682900105
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/31552]
专题	土木工程学院
通讯作者	Guan, Yuntao
作者单位	1.Tsinghua Univ, Grad Sch Shenzhen, Beijing, Peoples R China 2.Tsinghua Univ, Guangdong Prov Engn Technol Res Ctr Urban Water C, Grad Sch Shenzhen, Beijing, Peoples R China 3.Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou, Guangdong, Peoples R China 4.Sun Yat Sen Univ, Guangdong Prov Key Lab Environm Pollut Control &, Guangzhou, Guangdong, Peoples R China 5.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou, Gansu, Peoples R China 6.Tsinghua Univ, Sch Environm, State Environm Protect Key Lab Microorganism Appl, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Xiaoqian,Zhang, Miaoyue,Yan, Binggang,et al. Roles of Mg-Al layered double hydroxides and solution chemistry on P transport in soil[J]. CHEMICAL ENGINEERING JOURNAL,2019,373:1111-1119.
APA	Jiang, Xiaoqian,Zhang, Miaoyue,Yan, Binggang,Hu, Jiawei,Chen, Jiayu,&Guan, Yuntao.(2019).Roles of Mg-Al layered double hydroxides and solution chemistry on P transport in soil.CHEMICAL ENGINEERING JOURNAL,373,1111-1119.
MLA	Jiang, Xiaoqian,et al."Roles of Mg-Al layered double hydroxides and solution chemistry on P transport in soil".CHEMICAL ENGINEERING JOURNAL 373(2019):1111-1119.