Nitrate contamination in groundwater in the Sidi Aïch–Gafsa oases region, Southern Tunisia

Hamed, Younes; Awad, Sadek; Saad, Ahmed S.

doi:10.1007/s12665-013-2445-5

Cited by 38 publications

(14 citation statements)

References 26 publications

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“…It is mainly confined and discharges in the Chotts Djerid (10,000 Km 2 ) of Tunisia, in the Chott Melhir of Algeria continental depressions and in the Gabes Gulf (Mediterranean Sea, Fig. 1A) (Ben Dhia, 1987;Swezey, 2003;Guendouz et al, 2003;OSS, 2003;Hamed et al, 2010b;Kamel, 2012;Hamed et al, 2013a). Recent recharge is observed at the periphery of the Sahara basin .…”

Section: Lying On Sedimentary Relicts Frommentioning

confidence: 99%

“…Nitrate pollution of water is of high concern as it may have negative impacts on water supply and ecosystems (Rouabhia et al, 2004(Rouabhia et al, , 2008aHamed, 2009a;Ben Moussa et al, 2010a;Darwish et al, 2011;Diédhiou, 2012;Hamed et al, 2013a (Bengtsm and Annadotter, 1989;Avery, 1999), cancer through the formation of carcinogenic N-nitroso compounds (Weyer et al, 2001), to spontaneous abortions (Centers for Disease Control and Prevention, 1996), and to non-Hodgkin's lymphoma (Ward et al, 1996). As nitrate contamination is related to human, animal, or industrial waste practices, (Fig.…”

Section: Nitrate Geochemistry (Land Use)mentioning

confidence: 99%

“…The high concentration of NO 3 ions in groundwater is indicative of the unconfined nature of the system and this also suggests that the groundwaters are very young in age. Indeed, ammonium nitrate, liquid fertilizer and other commercial complex nitrogen fertilizers are used in large scale in the agricultural regions to enhance productivity due to rapid population increase and development of technology, where flood irrigation is applied (Hamed et al, 2013a). In Gafsa basin nitrate occurs naturally in groundwater.…”

Section: Nitrate Geochemistry (Land Use)mentioning

confidence: 99%

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Hydrogeochemical and stable isotope data of groundwater of a multi-aquifer system: Northern Gafsa basin – Central Tunisia

Mokadem

Demdoum

Hamed

et al. 2016

Journal of African Earth Sciences

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The hydrodynamic of the multi-aquifer system (the Continental Intercalaire " C.I " and the Complex Terminal " C.T ") of the North Gafsa basin is largely determined by tectonics (Tebessa-Gafsa fault). The composition of groundwater is controlled by complex reactions at gas-liquid-solid "mineralogical composition of associated rocks" interfaces, which depend on the natural surrounding and potential anthropogenic impact. The hydrochemical data (major ion geochemistry) indicate that these groundwaters are characterized by the dominance a Ca-Mg-HCO 3 /SO 4 and Na-Cl-NO 3 water types. Geochemical pattern is mainly controlled by the

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Section: Lying On Sedimentary Relicts Frommentioning

confidence: 99%

Section: Nitrate Geochemistry (Land Use)mentioning

confidence: 99%

Section: Nitrate Geochemistry (Land Use)mentioning

confidence: 99%

See 1 more Smart Citation

Hydrogeochemical and stable isotope data of groundwater of a multi-aquifer system: Northern Gafsa basin – Central Tunisia

Mokadem

Demdoum

Hamed

et al. 2016

Journal of African Earth Sciences

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“…Wastewater irrigation is the one of the most significant anthropogenic source of nitrate contamination in groundwater (Hamed et al 2013;Rao et al 2013;Nandimandalam 2012). Many places in the world depend on groundwater as a primary drinking water source.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of biological clogging on transport of nitrate in an unsaturated porous media

2014

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In order to better understand nitrogen species transport and transformation in the saturated zone, it is essential to predict the contaminant concentration in the unsaturated zone as the concentration profiles estimated from unsaturated zone forms as the input for estimation of contaminant concentration in the saturated zone. Since the nitrogen transformations occur in the presence of bacteria, there is a need to account the influence of biological clogging to develop comprehensive model of nitrogen species transport. In this study, a one-dimensional numerical model is developed to investigate the nitrogen species transport in an unsaturated porous media along with microbial clogging process. Results suggest that hydraulic conductivity is enhanced initially due to increase in the water content followed by a significant reduction at larger simulation time resulting from bioclogging. As bioclogging mitigates the hydraulic conductivity significantly, a considerable delay is observed in the ammonium nitrogen and nitrate nitrogen transport with reference to the system without bioclogging. In addition, the effect of oxygen mass transfer coefficient on biological clogging was evaluated. Numerical results suggest that as the oxygen mass transfer is decreased the ammonium nitrogen and nitrate nitrogen concentration travels a larger depth. Further numerical results strongly suggest that nitrogen species transport in the unsaturated zone is significantly affected by the presence of biological clogging.

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“…Regarding the health risk assessment of nitrates, the oral hazard quotient can be expressed as: (4) …where HQoral-water indicates a non-carcinogenic hazard by ingestion of water (non-dimensional);…”

Section: Risk Characterizationmentioning

confidence: 99%

Health Risk Assessment of Nitrate Pollution in Shallow Groundwater: A Case Study in China

Tian¹,

Liang²,

Gong³

et al. 2019

Pol. J. Environ. Stud.

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Groundwater is one of Earth's most precious natural resources [1]. It is vital to human health and the quality and quantity of grains because it affects soils, crops, and the surrounding environment [1,2]. However, due to environmental changes andhuman activities, groundwater quality is deteriorating at an alarming rate [3]. In recent years, the excessive use of chemical fertilizers and pesticides in agricultural areas hasbecome a major source of groundwater pollution, attracting considerable attention [4,5]. Since 2006, China has become the world's largest producer and consumer of fertilizers. In 2016, global fertilizer consumption was approximately 187 million tons, of which China's consumption was 59.84 million tons [6,7]. The large-scale use of chemical fertilizers,

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Nitrate contamination in groundwater in the Sidi Aïch–Gafsa oases region, Southern Tunisia

Cited by 38 publications

References 26 publications

Hydrogeochemical and stable isotope data of groundwater of a multi-aquifer system: Northern Gafsa basin – Central Tunisia

Hydrogeochemical and stable isotope data of groundwater of a multi-aquifer system: Northern Gafsa basin – Central Tunisia

Numerical modeling of biological clogging on transport of nitrate in an unsaturated porous media

Health Risk Assessment of Nitrate Pollution in Shallow Groundwater: A Case Study in China

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