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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Autores principales:	Renato P. Ribeiro, Luiz Felipe P. Alves, Clara B. de Cerqueira, Letícia M. Mombrini, Heitor Breno P. Ferreira
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	dissolved oxygen nitrogen-enriched water bodies nitrous oxide wastewater discharge Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/2ac348b5627146208e381c421d6900c5
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spelling	oai:doaj.org-article:2ac348b5627146208e381c421d6900c52021-11-06T10:50:57ZEffects of untreated or insufficiently treated wastewater discharges on the spatial and temporal variability of nitrous oxide (N2O) emissions from different streams in southeastern Brazil0273-12231996-973210.2166/wst.2021.043https://doaj.org/article/2ac348b5627146208e381c421d6900c52021-03-01T00:00:00Zhttp://wst.iwaponline.com/content/83/5/1141https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Increasing 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.Renato P. RibeiroLuiz Felipe P. AlvesClara B. de CerqueiraLetícia M. MombriniHeitor Breno P. FerreiraIWA Publishingarticledissolved oxygennitrogen-enriched water bodiesnitrous oxidewastewater dischargeEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 5, Pp 1141-1151 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	dissolved oxygen nitrogen-enriched water bodies nitrous oxide wastewater discharge Environmental technology. Sanitary engineering TD1-1066
spellingShingle	dissolved oxygen nitrogen-enriched water bodies nitrous oxide wastewater discharge Environmental technology. Sanitary engineering TD1-1066 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
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.
format	article
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
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_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_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_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
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/2ac348b5627146208e381c421d6900c5
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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

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