title: Effects of Varying Particle Sizes and Different Types of LDH-Modified Anthracite in Simulated Test Columns for Phosphorous Removal.
abstract: A comparative study was carried out for the removal of phosphorus in simulated unplanted vertical-flow constructed wetlands with different layered double hydroxide (LDHs) coated anthracite substrates. Three particle sizes of anthracites were selected and modified separately with nine kinds of LDH coating. The simulated substrates test columns loaded with the original and modified anthracites were constructed to treat the contaminated water. For the medium and large particle size modified anthracite substrates, the purification effects of total phosphorus, total dissolved phosphorus and phosphate were improved by various degrees, and the purification effect of the medium particle size anthracite is better than that of the large size one. The medium size anthracite modified by ZnCo-LDHs had optimal performance with average removal efficiencies of total phosphorus, total dissolved phosphorus and phosphate reaching 95%, 95% and 98%, respectively. The maximum adsorption capacity on ZnCo-LDHs and ZnAl-LDHs modified medium sizes anthracites were 65.79 (mg/kg) and 48.78 (mg/kg), respectively. In comparison, the small size anthracite is not suitable for LDHs modification.
authors.affiliation: School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China. zhangxiangling@whut.edu.cn.
authors.forename: Xiangling
authors.initials: X
authors.lastname: Zhang
authors.affiliation: School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China. cqz@whut.edu.cn.
authors.forename: Qiaozhen
authors.initials: Q
authors.lastname: Chen
authors.affiliation: School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China. guolu12_whut@126.com.
authors.forename: Lu
authors.initials: L
authors.lastname: Guo
authors.affiliation: School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China. hhlwhut@163.com.
authors.forename: Hualing
authors.initials: H
authors.lastname: Huang
authors.affiliation: School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China. ruancyvivi@126.com.
authors.forename: Chongying
authors.initials: C
authors.lastname: Ruan
mesh_terms: D000327:Adsorption; D003031:Coal; D010316:Particle Size; D010758:Phosphorus / Q000302:isolation & purification*; D011522:Protons; D012722:Sewage / Q000737:chemistry; D018508:Water Purification; D053833:Wetlands
chemical_list: D003031:Coal; D011522:Protons; D012722:Sewage; D010758:Phosphorus
keywords: LDHs; anthracite substrate; coating modification; phosphorous removal; sewage treatment