title: Optimizations on supply and distribution of dissolved oxygen in constructed wetlands: A review.
abstract: Dissolved oxygen (DO) is one of the most important factors that can influence pollutants removal in constructed wetlands (CWs). However, problems of insufficient oxygen supply and inappropriate oxygen distribution commonly exist in traditional CWs. Detailed analyses of DO supply and distribution characteristics in different types of CWs were introduced. It can be concluded that atmospheric reaeration (AR) served as the promising point on oxygen intensification. The paper summarized possible optimizations of DO in CWs to improve its decontamination performance. Process (tidal flow, drop aeration, artificial aeration, hybrid systems) and parameter (plant, substrate and operating) optimizations are particularly discussed in detail. Since economic and technical defects are still being cited in current studies, future prospects of oxygen research in CWs terminate this review.
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, China.
authors.forename: Huaqing
authors.initials: H
authors.lastname: Liu
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Hu
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, China. Electronic address: zhangjian00@sdu.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.affiliation: School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
authors.forename: Huu Hao
authors.initials: HH
authors.lastname: Ngo
authors.affiliation: School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
authors.forename: Wenshan
authors.initials: W
authors.lastname: Guo
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Liang
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, China.
authors.forename: Jinlin
authors.initials: J
authors.lastname: Fan
authors.affiliation: Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Shaoyong
authors.initials: S
authors.lastname: Lu
authors.affiliation: College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China.
authors.forename: Haiming
authors.initials: H
authors.lastname: Wu
mesh_terms: D000327:Adsorption; D001272:Atmosphere; D004785:Environmental Pollutants / Q000737:chemistry; D052918:Environmental Restoration and Remediation; D005740:Gases; D009584:Nitrogen / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D010944:Plants; D062065:Wastewater; D053833:Wetlands
chemical_list: D004785:Environmental Pollutants; D005740:Gases; D009584:Nitrogen; D010100:Oxygen; D010758:Phosphorus; D062065:Wastewater
keywords: Characteristics; Constructed wetlands; Dissolved oxygen; Pollutants removal; Supply and distribution