Transport and retention of phosphorus in soil with addition of Mg-Al layered double hydroxides: Effects of material dosage, flow velocity and pH

doi:10.1016/j.cej.2019.122154

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Transport and retention of phosphorus in soil with addition of Mg-Al layered double hydroxides: Effects of material dosage, flow velocity and pH
	Jiang, Xiaoqian 1,2; Yan, Binggang 3; Chen, Jiayu 1,2,4; Li, Wenyan 5; Hu, Jiawei ; Guan, Yuntao 1,2,4
刊名	CHEMICAL ENGINEERING JOURNAL
	2019-12-15
卷号	378
关键词	Phosphorus Mg-Al LDHs Flow velocity pH Breakthrough curves Retention profiles
ISSN号	1385-8947
DOI	10.1016/j.cej.2019.122154
英文摘要	Mg-Al layered double hydroxides (LDHs) were applied to soils to control phosphorus (P) loss. Column experiments were conducted with soil and LDHs under saturated conditions to investigate the retention and release of P with various LDHs dosages, flow velocity, and pH. The P retention and retardation of P breakthrough in soil with LDHs were enhanced with increasing LDHs dosages and pH as well as with decreasing flow velocity. The retention of P was successfully analyzed using a two kinetic sites model that accounted for irreversible and reversible retentions. Increasing LDHs dosages, decreasing flow velocity, and increasing pH bring greater maximum retained concentration on the solid phases (S-max1, i.e. irreversible retention) for P in LDHs-soil system. For reversible retention, the greater release rate from site 2 (k(2d)) than first-order retention rate coefficient on site 2 (k(2)) for most experiments reflects a rapid release process and near equilibrium transport behavior of P in LDHs-soil system. It is worth noting that the change of soil pH (8-5) and Darcy velocity (0.17-0.65 cm min(-1)) has little influence on the release of P from soil mixing with LDHs. The stability of LDHs in soil increases with greater LDHs dosages, higher pH, and lower velocity.
资助项目	China Postdoctoral Science Foundation[2018M640142]
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000487764800083
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/31476]
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, Grad Sch Shenzhen, Guangdong Prov Engn Technol Res Ctr Urban Water C, Beijing, Peoples R China 3.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou, Gansu, Peoples R China 4.Tsinghua Univ, Sch Environm, State Environm Protect Key Lab Microorganism Appl, Beijing 100084, Peoples R China 5.South China Agr Univ, Joint Inst Environm Res & Educ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Xiaoqian,Yan, Binggang,Chen, Jiayu,et al. Transport and retention of phosphorus in soil with addition of Mg-Al layered double hydroxides: Effects of material dosage, flow velocity and pH[J]. CHEMICAL ENGINEERING JOURNAL,2019,378.
APA	Jiang, Xiaoqian,Yan, Binggang,Chen, Jiayu,Li, Wenyan,Hu, Jiawei,&Guan, Yuntao.(2019).Transport and retention of phosphorus in soil with addition of Mg-Al layered double hydroxides: Effects of material dosage, flow velocity and pH.CHEMICAL ENGINEERING JOURNAL,378.
MLA	Jiang, Xiaoqian,et al."Transport and retention of phosphorus in soil with addition of Mg-Al layered double hydroxides: Effects of material dosage, flow velocity and pH".CHEMICAL ENGINEERING JOURNAL 378(2019).