Enzymatic activities in constructed wetlands and di-n-butyl phthalate (DBP) biodegradation

Zhou, Qiaohong; Wu, Zhenbin; Cheng, Shuiping; He, Feng; Gui, Fu

doi:10.1016/j.soilbio.2005.01.003

Cited by 105 publications

(33 citation statements)

References 28 publications

(26 reference statements)

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“…It was found that almost all the microbial indicators in down-flow cells were higher than those in up-flow ones, especially for the plots fed with DW, which was consistent to other reports [19,34]. It might be attributed to the higher nutrient availability in top layer of down-flow cell [36][37][38].…”

Section: Discussionsupporting

confidence: 88%

“…Microbial abundances, enzyme activities, and potentials of nitrification and denitrification were widely employed as informative indicators for elucidating status of microbial ecology and ecosystem processes in CWs due to their sensitivity to environmental variations and well correlation with contaminant removal function [5,10,33,34]. Most parameters characterizing microbial activities were positively related to the abundances of cultivable microbes significantly, especially bacteria (Table 2), suggesting the consistency of microbial quantity and activity.…”

Section: Discussionmentioning

confidence: 99%

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Responses of microbial abundance and enzyme activity in integrated vertical-flow constructed wetlands for domestic and secondary wastewater

Chang

Liang

et al. 2014

Desalination and Water Treatment

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A B S T R A C TAlthough micro-organisms play a significant role in pollutant removal in constructed wetlands, little is known on the effect of wastewater-quality properties on microbial characteristics. In this study, two groups of integrated vertical-flow constructed wetland microcosms were applied to treat synthetic domestic wastewater and synthetic secondary effluent. The effects of wastewater-quality properties on microbial features were assessed. Results showed that higher values of microbial indicators were observed in the systems with domestic wastewater and in down-flow cells. Redundancy analysis revealed that organic matter concentration and temperature were two critical determinants influencing the microbial features.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Responses of microbial abundance and enzyme activity in integrated vertical-flow constructed wetlands for domestic and secondary wastewater

Chang

Liang

et al. 2014

Desalination and Water Treatment

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“…The permanganate oxidizable C (KMnO 4 -C) was estimated using the method reported by Vieira [11]. Catalase activity (CAT) was assayed using titration method as described by Zhou [12], while dehydrogenase (DEH), alkaline phosphatase (ALP), β-glucosidase (GLU), arylsulphatase (ARY) and urease (URE) activities were determined as reported by Tabatabai [13].…”

Section: B Soil Assaysmentioning

confidence: 99%

Effects of Long-term Irrigation with Water from Wastewater Receiving River on Soil Chemical and Microbiological Properties in Hebei, China

Gao¹,

Liang²,

Zhang³

et al. 2015

Advances in Computer Science Research

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Abstract-In arid and semi-arid regions in China, a large amount of treated wastewater is discharged into rivers that supply water for agriculture. Treated wastewater contains not only valuable nutrients, but also toxic contaminants that might affect soil quality. This study investigated how long-term irrigation with water from a wastewater receiving river affected soil chemical and microbiological properties in Hebei Province, China. Soil samples were collected from three river water irrigated fields adjacent to Wangyang River, and three groundwater irrigated fields far from the river. The results showed that irrigation with river water for more than 20 years had significantly increased dissolved organic C, microbial biomass C and permanganate oxidizable C contents, and β-glucosidase, urease, alkaline phosphatase, arylsulphatase and dehydrogenase activities in the surface soil, reflecting a stimulated microbial activity in river water irrigated soils. Long-term irrigation with river water has also resulted in accumulation of Hg, Cd, As, Pb, Cu, Cr and Zn in the soil, and may pose potential risk to soil quality and food safety. We conclude that although the river water irrigation has beneficial effects on soil microbiological characteristics, a controlled irrigation management based on periodic monitoring of soil quality parameters is needed to ensure its safe and long-term use in agriculture.

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“…Five representative rhizosphere samples were collected from five target plants in each flow-chamber (DFC, UFC and HFC) and homogenized well to make a composite sample once in every two months from mid-March 2012 to mid-January 2013 [9,24]. After all litter was removed, the field-moist samples were sieved (10 mm for steel slag and zeolite; 15 mm for gravel) and stored in a refrigerator at 4˚C for analysis of enzyme activities.…”

Section: Sampling and Analysismentioning

confidence: 99%

“…Just like soil, substrates in CWs are also a living dynamic system including many free enzymes, immobilized extra-cellular enzymes, and enzymes within microbial cells [8]. These intra-cellular or extra-cellular enzymes catalyze the decomposition of macro-molecular pollutants into assimilable lowmolecular moieties [9,10], and some enzymes, such as protease, urease, nitrate reductase (NR), and phosphatase (PP), are widely distributed and related to nitrogen and phosphorus cycles in CWs [8]. Enzyme activity is proposed to be one of the pivotal determinants for water quality amelioration in wetland systems [11,12].…”

Section: Introductionmentioning

confidence: 99%

Enzyme activities in pilot-scale constructed wetlands for treating urban runoff in China: temporal and spatial variations

Weijie¹,

Zhu²,

Cheng³

et al. 2014

Desalination and Water Treatment

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A B S T R A C TTwo pilot-scale integrated constructed wetland (ICW) systems were constructed to assess the feasibility of treating urban runoff in Hefei, P.R. China. Each ICW consisted of a downflow chamber (50 m 2 , planted with Canna indica), an up-flow chamber (50 m 2 , planted with Iris pseudacorus), and a horizontal subsurface-flow chamber (50 m 2 , planted with Acorus calamus) in series. Substrate enzyme activities, growth of vegetation, and contaminant removal efficiencies were monitored during a one-year period. These two systems, achieved an average efficiency of 64.8% for total phosphorus (TP), 59.6% for total nitrogen (TN), 52.7% for ammonium (NH þ 4 -N), and 72.7% for chemical oxygen demand (COD). There were significant correlations between the phosphatase (PP) activity and the removal efficiencies of TP and COD, as well as between the urease (UR) activity and TN removal. The activities of both nitrate reductase (NR) and PP were the highest in down-flow chamber (DFC), and then in up-flow chamber (UFC) and horizontal subsurface-flow chamber (HFC), successively. Meanwhile, the maximum enzyme activities of DFC and UFC occurred in summer or autumn when plants were in the vigorous growing stage. Furthermore, the enzyme activities of both PP and UR were significantly correlated with all growth parameters of C. indica in DFC. Significant correlations existed between the root number of I. pseudacorus, and PP and UR activities in UFC. In HFC, there were no significant correlations between the enzyme activities (PP, UR, and NR) and all growth parameters of A. calamus.

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Enzymatic activities in constructed wetlands and di-n-butyl phthalate (DBP) biodegradation

Cited by 105 publications

References 28 publications

Responses of microbial abundance and enzyme activity in integrated vertical-flow constructed wetlands for domestic and secondary wastewater

Responses of microbial abundance and enzyme activity in integrated vertical-flow constructed wetlands for domestic and secondary wastewater

Effects of Long-term Irrigation with Water from Wastewater Receiving River on Soil Chemical and Microbiological Properties in Hebei, China

Enzyme activities in pilot-scale constructed wetlands for treating urban runoff in China: temporal and spatial variations

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