title: Correlation Among Soil Enzyme Activities, Root Enzyme Activities, and Contaminant Removal in Two-Stage In Situ Constructed Wetlands Purifying Domestic Wastewater.
abstract: Two-stage in situ wetlands (two vertical flow constructed wetlands in parallel and a horizontal flow constructed wetland) were constructed for studying domestic wastewater purification and the correlations between contaminant removal and plant and soil enzyme activities. Results indicated the removal efficiency of NH4 (+) and NO3 (-) were significantly correlated with both urease and protease activity, and the removal of total phosphorus was significantly correlated with phosphatase activity. Chemical oxygen demand removal was not correlated with enzyme activity in constructed wetlands. Plant root enzyme (urease, phosphatase, protease and cellulose) activity correlation was apparent with all contaminant removal in the two vertical flow constructed wetlands. However, the correlation between the plant root enzyme activity and contaminant removal was poor in horizontal flow constructed wetlands. Results indicated that plant roots clearly played a role in the removal of contaminants.
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE; School of Environment, Hohai University, Nanjing, 210098, China.
authors.forename: Lixiao
authors.initials: L
authors.lastname: Ni
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE; School of Environment, Hohai University, Nanjing, 210098, China.
authors.forename: Jiajun
authors.initials: J
authors.lastname: Xu
authors.affiliation: TongLing Capital Water Co, Ltd, Tongling, 240000, China.
authors.forename: Xianglin
authors.initials: X
authors.lastname: Chu
authors.affiliation: School of Environment, Nanjing Normal University, Nanjing, 210097, China. 07175@njnu.edu.cn.
authors.forename: Shiyin
authors.initials: S
authors.lastname: Li
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE; School of Environment, Hohai University, Nanjing, 210098, China.
authors.forename: Peifang
authors.initials: P
authors.lastname: Wang
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE; School of Environment, Hohai University, Nanjing, 210098, China.
authors.forename: Yiping
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE; School of Environment, Hohai University, Nanjing, 210098, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE; School of Environment, Hohai University, Nanjing, 210098, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE; School of Environment, Hohai University, Nanjing, 210098, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Wang
mesh_terms: D057919:Biological Oxygen Demand Analysis; D044602:Cellulases / Q000378:metabolism; D009584:Nitrogen / Q000032:analysis; D010447:Peptide Hydrolases / Q000378:metabolism; D010744:Phosphoric Monoester Hydrolases / Q000378:metabolism; D010758:Phosphorus / Q000032:analysis; D018517:Plant Roots / Q000737:chemistry* / Q000201:enzymology; D010944:Plants / Q000737:chemistry* / Q000201:enzymology; D012987:Soil / Q000737:chemistry*; D014510:Urease / Q000378:metabolism; D062065:Wastewater / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification; D053833:Wetlands
chemical_list: D044602:Cellulases; D009584:Nitrogen; D010447:Peptide Hydrolases; D010744:Phosphoric Monoester Hydrolases; D010758:Phosphorus; D012987:Soil; D014510:Urease; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Correlation; Plant; Purification efficiency; Substrate; Two-stage CW