Pretreatment methods for aquatic plant biomass as carbon sources for potential use in treating eutrophic water in subsurface-flow constructed wetlands

Plant biomass is usually added to constructed wetlands (CW) to enhance denitrification. In this study, we investigated effects of different pretreatments on two common external plant carbon sources, cattail and reed litter. We determined the average ratio of chemical oxygen demand (COD) to total nit...

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Veröffentlicht in:Water science and technology : a journal of the International Association on Water Pollution Research. - 1986. - 66(2012), 11 vom: 15., Seite 2328-35
1. Verfasser: Huang, Xiang-Feng (VerfasserIn)
Weitere Verfasser: Liu, Xin, Shang, Jia-Jia, Feng, Yi, Liu, Jia, Lu, Li-Jun
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2012
Zugriff auf das übergeordnete Werk:Water science and technology : a journal of the International Association on Water Pollution Research
Schlagworte:Evaluation Study Journal Article Research Support, Non-U.S. Gov't Sulfuric Acids Sodium Hydroxide 55X04QC32I sulfuric acid O40UQP6WCF Acetic Acid Q40Q9N063P
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520 |a Plant biomass is usually added to constructed wetlands (CW) to enhance denitrification. In this study, we investigated effects of different pretreatments on two common external plant carbon sources, cattail and reed litter. We determined the average ratio of chemical oxygen demand (COD) to total nitrogen (TN), designated as C/N, in water samples after addition of litter subjected to various pretreatments. The C/N in the water samples ranged from 4.8 to 6.4 after addition of NaOH-pretreated cattail litter, which was four to six times greater than that of water from the Yapu River and 3.84-39.15% higher than that of systems that received untreated cattail litter. The C/N of systems that received H(2)SO(4)-pretreated carbon sources varied from 1.7 to 3.6. These two methods resulted in TN and total phosphorus (TP) levels lower than those in river water. The C/N was 1.4-1.7 after addition of CH(3)COOH-pretreated reed litter, which was 34.87-53.83% higher than that of river water. The C/N was 2.5 in systems that received mild alkali/oxidation-pretreated reeds, which was 30.59% higher than that of systems that received non-pretreated reeds. The residue rates of cattail and reed litter subjected to various pretreatments were greater than 60%. Our results showed that NaOH, H(2)SO(4), and mild alkali/oxidation pretreatments were useful to rapidly improve the C/N of river water and enhance denitrification 
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650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
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650 7 |a Sodium Hydroxide  |2 NLM 
650 7 |a 55X04QC32I  |2 NLM 
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650 7 |a O40UQP6WCF  |2 NLM 
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650 7 |a Q40Q9N063P  |2 NLM 
700 1 |a Liu, Xin  |e verfasserin  |4 aut 
700 1 |a Shang, Jia-Jia  |e verfasserin  |4 aut 
700 1 |a Feng, Yi  |e verfasserin  |4 aut 
700 1 |a Liu, Jia  |e verfasserin  |4 aut 
700 1 |a Lu, Li-Jun  |e verfasserin  |4 aut 
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