Effects of untreated or insufficiently treated wastewater discharges on the spatial and temporal variability of nitrous oxide (N2O) emissions from different streams in southeastern Brazil
Increasing atmospheric N2O concentrations is of great environmental concern due to the role of this gas in climate change and stratospheric ozone destruction. Nitrogen-enriched lotic water bodies are significant sources of N2O. However, N2O emissions from rivers and streams, particularly those that...
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| Format: | Article |
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IWA Publishing
2021-03-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/83/5/1141 |
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| author | Renato P. Ribeiro Luiz Felipe P. Alves Clara B. de Cerqueira Letícia M. Mombrini Heitor Breno P. Ferreira |
| author_facet | Renato P. Ribeiro Luiz Felipe P. Alves Clara B. de Cerqueira Letícia M. Mombrini Heitor Breno P. Ferreira |
| author_sort | Renato P. Ribeiro |
| collection | DOAJ |
| description | Increasing atmospheric N2O concentrations is of great environmental concern due to the role of this gas in climate change and stratospheric ozone destruction. Nitrogen-enriched lotic water bodies are significant sources of N2O. However, N2O emissions from rivers and streams, particularly those that receive untreated or insufficiently treated wastewater discharge, are poorly understood, especially in Brazil. The present study investigated the effects of the discharge of untreated or insufficiently treated wastewater on the spatial–temporal variability of N2O emissions from different streams in Ilha Grande, located within the Abraão hydrographic system, in southeastern Brazil. Estimated N2O fluxes determined in Abraão streams and upstream of the urbanized stretch ranged from 18.4 and 96.5 μg N m−2 h−1. Inside the urbanized stretch, estimated N2O fluxes ranged from 110 to 561 μg N m−2 h−1 under non-limited dissolved oxygen (DO) conditions and 133 to 2,229 μg N m−2 h−1 under hypoxic conditions (DO < 2 mg O2 L−1). High spatial and temporal variability in N2O emissions were noted, with the highest emissions in Abraão urban areas. Therefore, the differences observed between N2O fluxes from the studied streams at Abraão seem to be associated with different lotic water body conditions, such as availability of reactive N and DO. |
| first_indexed | 2024-12-19T19:14:22Z |
| format | Article |
| id | doaj.art-2ac348b5627146208e381c421d6900c5 |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-12-19T19:14:22Z |
| publishDate | 2021-03-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-2ac348b5627146208e381c421d6900c52022-12-21T20:09:11ZengIWA PublishingWater Science and Technology0273-12231996-97322021-03-018351141115110.2166/wst.2021.043043Effects of untreated or insufficiently treated wastewater discharges on the spatial and temporal variability of nitrous oxide (N2O) emissions from different streams in southeastern BrazilRenato P. Ribeiro0Luiz Felipe P. Alves1Clara B. de Cerqueira2Letícia M. Mombrini3Heitor Breno P. Ferreira4 Centro Experimental de Monitoramento e Mitigação Ambiental, Instituto Federal do Rio de Janeiro, Rua Lúcio Tavares, 1045, 26530-060, Nilópolis, RJ, Brazil Centro Experimental de Monitoramento e Mitigação Ambiental, Instituto Federal do Rio de Janeiro, Rua Lúcio Tavares, 1045, 26530-060, Nilópolis, RJ, Brazil Centro Experimental de Monitoramento e Mitigação Ambiental, Instituto Federal do Rio de Janeiro, Rua Lúcio Tavares, 1045, 26530-060, Nilópolis, RJ, Brazil Centro Experimental de Monitoramento e Mitigação Ambiental, Instituto Federal do Rio de Janeiro, Rua Lúcio Tavares, 1045, 26530-060, Nilópolis, RJ, Brazil Centro Experimental de Monitoramento e Mitigação Ambiental, Instituto Federal do Rio de Janeiro, Rua Lúcio Tavares, 1045, 26530-060, Nilópolis, RJ, Brazil Increasing atmospheric N2O concentrations is of great environmental concern due to the role of this gas in climate change and stratospheric ozone destruction. Nitrogen-enriched lotic water bodies are significant sources of N2O. However, N2O emissions from rivers and streams, particularly those that receive untreated or insufficiently treated wastewater discharge, are poorly understood, especially in Brazil. The present study investigated the effects of the discharge of untreated or insufficiently treated wastewater on the spatial–temporal variability of N2O emissions from different streams in Ilha Grande, located within the Abraão hydrographic system, in southeastern Brazil. Estimated N2O fluxes determined in Abraão streams and upstream of the urbanized stretch ranged from 18.4 and 96.5 μg N m−2 h−1. Inside the urbanized stretch, estimated N2O fluxes ranged from 110 to 561 μg N m−2 h−1 under non-limited dissolved oxygen (DO) conditions and 133 to 2,229 μg N m−2 h−1 under hypoxic conditions (DO < 2 mg O2 L−1). High spatial and temporal variability in N2O emissions were noted, with the highest emissions in Abraão urban areas. Therefore, the differences observed between N2O fluxes from the studied streams at Abraão seem to be associated with different lotic water body conditions, such as availability of reactive N and DO.http://wst.iwaponline.com/content/83/5/1141dissolved oxygennitrogen-enriched water bodiesnitrous oxidewastewater discharge |
| spellingShingle | Renato P. Ribeiro Luiz Felipe P. Alves Clara B. de Cerqueira Letícia M. Mombrini Heitor Breno P. Ferreira Effects of untreated or insufficiently treated wastewater discharges on the spatial and temporal variability of nitrous oxide (N2O) emissions from different streams in southeastern Brazil Water Science and Technology dissolved oxygen nitrogen-enriched water bodies nitrous oxide wastewater discharge |
| title | Effects of untreated or insufficiently treated wastewater discharges on the spatial and temporal variability of nitrous oxide (N2O) emissions from different streams in southeastern Brazil |
| title_full | Effects of untreated or insufficiently treated wastewater discharges on the spatial and temporal variability of nitrous oxide (N2O) emissions from different streams in southeastern Brazil |
| title_fullStr | Effects of untreated or insufficiently treated wastewater discharges on the spatial and temporal variability of nitrous oxide (N2O) emissions from different streams in southeastern Brazil |
| title_full_unstemmed | Effects of untreated or insufficiently treated wastewater discharges on the spatial and temporal variability of nitrous oxide (N2O) emissions from different streams in southeastern Brazil |
| title_short | Effects of untreated or insufficiently treated wastewater discharges on the spatial and temporal variability of nitrous oxide (N2O) emissions from different streams in southeastern Brazil |
| title_sort | effects of untreated or insufficiently treated wastewater discharges on the spatial and temporal variability of nitrous oxide n2o emissions from different streams in southeastern brazil |
| topic | dissolved oxygen nitrogen-enriched water bodies nitrous oxide wastewater discharge |
| url | http://wst.iwaponline.com/content/83/5/1141 |
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