dc.contributor.author | Kumar, B.S.K. | |
dc.contributor.author | Sridevi, B. | |
dc.contributor.author | Sarma, V.V.S.S. | |
dc.contributor.author | Cardinal, D. | |
dc.contributor.author | Sebilo, M. | |
dc.date.accessioned | 2024-10-03 | |
dc.date.accessioned | 2025-02-11T11:21:20Z | |
dc.date.available | 2024-08-09 | |
dc.date.available | 2025-02-11T11:21:20Z | |
dc.date.issued | 2024 | |
dc.identifier.citation | ACS Environmental Science & Technology- Water, vol.4(8); 2024; 3521-3531 | |
dc.identifier.issn | 2690-0637 | |
dc.identifier.other | https://pubs.acs.org/doi/abs/10.1021/acsestwater.4c00338 | |
dc.identifier.uri | https://doi.org/10.1021/ACSESTWATER.4C00338 | |
dc.identifier.uri | http://drs.nio.res.in/drs/handle/2264/9376 | |
dc.description | IF2023= 4.8 | |
dc.description.abstract | Nitrate is accumulated in the groundwater, modified through nitrification/denitrification, and exchanged with coastal/estuarine water bodies. To examine the sources and modifications of nitrate, the concentrations and isotopic composition of nitrate (? 15N and ? 18ONO3) in the groundwater was monitored at 5 locations along the bank of Godavari estuary and in the estuarine waters for 7 months during wet (August-November) and dry (March-May) periods. Though the concentration of nitrate (NO3-) was higher during the wet than dry periods in both the groundwater and estuary, insignificant seasonal variability was observed in ?15N and ?18ONO3 indicating homogenization through mineralization-immobilization turnover of NO3-. The range of ?15N to ?18O of NO3- indicates soil, manure, and septic waste may be the major source of NO3-. The mean ratio of ?15N/?18O of 1.1 0.3 indicates the occurrence of denitrification in the groundwater. Concentrations ?15NNO3 and ?18ONO3 of NO3- displayed a significant relation between groundwater and estuarine water suggesting that NO3- is possibly denitrified. This study suggests that denitrified NO3- (enriched ?15N and ?18O) reported in the Godavari estuary may be contributed through submarine groundwater discharge than it is hypothesized to flux from the watershed. | |
dc.language | en | |
dc.publisher | American Chemical Society | |
dc.relation.isreferencedby | SCI | |
dc.rights | Only the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations | |
dc.title | Isotopic evidence of denitrified nitrate in groundwater beneath intensive agriculture and exchange with estuary (Godavari, India) | |
dc.type | Journal Article | |
dc.affiliation.author | CSIR-National Institute of Oceanography, Visakhapatnam, Andhra Pradesh, India | |