文献类型：期刊文献

英文题名：Influence of substrate depth and particle size on phosphorus removal in a surface flow constructed wetland

作者：Cui Lijuan[1,2,3] Li Wei[1,2,3] Zhou Jian[1,2,3] Zhang Yan[1,2,3] Zhang Manyin[1,2,3] Lei Yinru[1,2,3] Kang Xiaoming[1,2,3] Zhao Xinsheng[1,2,3] Pan Xu[1,2,3]

第一作者：Cui Lijuan

通信作者：Cui, LJ[1];Cui, LJ[2];Cui, LJ[3]

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Inst Wetland Res, Beijing Key Lab Wetland Serv & Restorat, Beijing 100091, Peoples R China;[3]Beijing Hanshiqiao Natl Wetland Ecosyst Res Stn, Beijing 101309, Peoples R China

年份：2017

卷号：75

期号：10

起止页码：2291-2298

外文期刊名：WATER SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20172903945929);Scopus(收录号：2-s2.0-85023201998);WOS:【SCI-EXPANDED(收录号:WOS:000402147100006)】；

基金：We would like to acknowledge the support received from the Special Fund for Forest Scientific Research in the Public Welfare (Grant No. 201404305) and 'The Lecture and Study Program for Outstanding Scholars from Home and Abroad' (CAFYBB2011007) and Beijing Wildlife Rescue & Rehabilitation Center. The authors would like to express their gratitude to two anonymous reviewers, whose insightful comments helped us strengthen this paper substantially. We also thank Edanz Editing China for linguistic assistance.

语种：英文

外文关键词：constructed wetland; dynamic process; inorganic phosphorus; organic phosphorus; phosphorus removal; wastewater treatment

摘要：Substrate adsorption is one of the main processes by which redundant phosphorus is removed from wastewater in surface flow constructed wetlands (SFCWs). The physical properties of the substrate, such as depth and particle size, will influence the amount of phosphorus adsorption. This study was carried out in a long-running intermittent inflow constructed wetland that covered a total area of 940.4 m(2) in the Shunyi District of Beijing, China. We investigated how the concentrations of four phosphorus fractions, namely calcium phosphate (CaP), iron phosphate (FeP), adsorbed phosphorus (AdsP), and organic phosphorus (OP), varied between the surface (0-10 cm) and subsurface (10-20 cm) substrate and among the different substrate particle sizes. The total phosphorus concentrations in the substrate ranged from 154.97 to 194.69 mg/kg; CaP accounted for more than 80% of the total phosphorus content. The concentrations of OP were significantly higher in the surface layer than in the subsurface layer, but the concentrations of inorganic phosphorus were not significantly different between the two layers. The CaP, AdsP, and OP adsorption capacities were greater for small-sized substrate particles than for large-sized substrate particles. The results from this study provide a theoretical basis for the construction of constructed wetlands.