Temporal variations in groundwater nitrogen under intensive groundwater/surface-water interaction

Shen, Shuai; Ma, Teng; Du, Yao; Luo, Kewen; Deng, Yamin; Lu, Zongjie

doi:10.1007/s10040-019-01952-x

Cited by 22 publications

(8 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sample depth showed no significant seasonal variation during the monitoring period, implying that temporal variations in hydrochemical characteristics in the OPGW were affected by a different patterns, i.e. combined control by internal sources and surface contributions (Shen et al 2019). The hydrochemical characteristics in both seasons (< 10 m) showed insignificant seasonal variation, and any change in hydrochemical characteristics was inferred as being associated with anthropogenic activities.…”

Section: Classification Of the Groundwater In O'kiepmentioning

confidence: 87%

Seasonal variation of hydrochemical characteristics of open-pit groundwater near a closed metalliferous mine in O’Kiep, Namaqualand Region, South Africa

et al. 2020

View full text Add to dashboard Cite

In this study, the hydrochemical characteristic changes of open-pit groundwater (OPGW) near a closed metalliferous mine proposed for drinking and irrigation usage were investigated. Water samples from an OPGW in O'Kiep were collected in April (dry season) and August (wet season), 2017. Data analysis methods, such as the coefficient of variation, correlation coefficient, piper trilinear plot analysis and sodium adsorption ratio (SAR) among others were used to assess of the seasonal variation in the OPGW quality. The hydrochemical characteristics of the OPGW were also compared with drinking water guidelines. Based on the results, it was evident that the OPGW quality varied seasonally. The most abundant cation and anions were Ca 2+ and SO 4 2− , with recorded concentrations of 631 and 6020 mg/L, (dry season); 541 and 4450 mg/L (wet season), respectively. The OPGW was relatively rich in SO 4 2− > Cl − > Mg 2+ > Ca 2+ > Na + > K + during the dry season; however, these cations and anions were reduced during the wet season with Cl − and Na + subsequently increasing. PHREEQC indicated that cation exchanges played a significant role in the OPGW chemistry with Sb and Ca appearing to be the minerals with the highest precipitation potential followed by Cu 7 S 4 and Blaubleil, respectively. Covellite, CdSe 2 and NiSe were likely to be in equilibrium while Ca 3 Sb 2 will remain in a dissolution state. Furthermore, the seasonal fluctuation in the OPGW quality characteristics was attributed to the water table level fluctuations and the water quality did not satisfy the guidelines stipulated by the South African National Standard, SANS241-1 (2015) and World Health Organisation, WHO (2011). The trilinear piper plot classified the OPGW into three types: Ca 2+ -Mg 2+ -Cl − -SO 4 2 ; Ca 2+ -Mg 2+ -F − ; and Ca 2+ -Mg 2+ -SO 4 2− . Overall, the SAR values were within the permissible levels for irrigation purposes; however, long-term use of the OPGW might be detrimental for plant growth.

show abstract

Section: Classification Of the Groundwater In O'kiepmentioning

confidence: 87%

Seasonal variation of hydrochemical characteristics of open-pit groundwater near a closed metalliferous mine in O’Kiep, Namaqualand Region, South Africa

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Other contaminants include arsenic as well as microorganisms such as Giardia, Campylobacter, Cryptosporidium, Salmonella, and Escherichia coli. NH 4 + -N groundwater contamination is usually caused by anthropogenic activities [1][2][3][4][5]. Groundwater NH 4 + -N levels of ≤ 120 mg L −1 , 69.8 mg L −1 , Organization (WHO) guideline for drinking water of 1.5 mg L −1 [10] is substantially less than the levels for these different locations.…”

Section: Introductionmentioning

confidence: 99%

Ammonium-Nitrogen (NH4+-N) Removal from Groundwater by a Dropping Nitrification Reactor: Characterization of NH4+-N Transformation and Bacterial Community in the Reactor

Maharjan

Kamei

Amatya

et al. 2020

Water

View full text Add to dashboard Cite

A dropping nitrification reactor was proposed as a low-cost and energy-saving option for the removal of NH4+-N from contaminated groundwater. The objectives of this study were to investigate NH4+-N removal performance and the nitrogen removal pathway and to characterize the microbial communities in the reactor. Polyolefin sponge cubes (10 mm × 10 mm × 10 mm) were connected diagonally in a nylon thread to produce 1 m long dropping nitrification units. Synthetic groundwater containing 50 mg L−1 NH4+-N was added from the top of the hanging units at a flow rate of 4.32 L day−1 for 56 days. Nitrogen-oxidizing microorganisms in the reactor removed 50.8–68.7% of the NH4+-N in the groundwater, which was aerated with atmospheric oxygen as it flowed downwards through the sponge units. Nitrogen transformation and the functional bacteria contributing to it were stratified in the sponge units. Nitrosomonadales-like AOB predominated and transformed NH4+-N to NO2−-N in the upper part of the reactor. Nitrospirales-like NOB predominated and transformed NO2−-N to NO3−-N in the lower part of the reactor. The dropping nitrification reactor could be a promising technology for oxidizing NH4+-N in groundwater and other similar contaminated wastewaters.

show abstract

“…Finally, let us not underestimate the health risk associated with the consumption of this groundwater by the sedentary population, and precisely by infants. According to (Ameur et al, 2016;Shen et al,2019;Zhai et al, 2017;Degbey et al, 2011), the same result was also found that young children were the most vulnerable group to exposure to nitric contamination.…”

Section: Fig 3 Statistical Analysis Of Nitrate Results For the Fourmentioning

confidence: 70%

“…This spatial variability in nitrate levels can also be due to the nitrogen provided by meteoric waters as demonstrated by (Shen et al,2019). The high levels of nitrates found in the waters of the Quaternary aquifer are of urban origin due to the infiltration of domestic wastewater into the ground, sewage, septic tanks, latrines and the decomposition of organic matter, according to (Chidya et al, 2016;El Bouqdaoui et al, 2009;Martinelli et al, 2018).…”

Section: Fig 3 Statistical Analysis Of Nitrate Results For the Fourmentioning

confidence: 99%

Assessment of Spatial and Seasonal Nitrate Variation of Groundwater in the Irrigated Perimeter (Tadla Plain- Morocco)

Hafiane¹,

Tahri²,

Nouayti³

et al. 2020

AgricultForest

View full text Add to dashboard Cite

The Nitric pollution in the groundwater of the Tadla plain increases the risk of degrading the quality of water resources and creates a risk to human health and the environment. This study aims to establish the state of pollution of the groundwater by nitrates in Béni Aamir and Béni Moussa aquifers, to follow its temporal evolution and to map its spatial distribution using Surfer software. To assess the contamination of well water by nitric pollution, 200 samples were collected in four seasonal campaigns between March 2017 and May 2018, with a rate of 43 samples taken per season. The spatial distribution of nitrates in the groundwater shows that the majority of the catchment points reached by this pollution are located in agricultural areas. Additionally, there was a range of 160.15 mg/L (4.65-164.5 mg/L). The temporal distribution of nitrate in the groundwater of Béni Aamir and Béni Moussa shows an increase in response to the agricultural intensification in this region, and a variation depending on the period of withdrawal. Including the increase in the quality degradation in all wells, from 1% in campaign N°01 to 7.06% in campaign N°02 and to 5.7% in campaign N°03, and to 0% as very bad quality in campaign N°04. The fact that the campaign N°02 has been carried out during the agricultural season, proves the link between the Nitrate pollution and chemical products uses during this period. Therefore, the impact of chemical products uses on the groundwater quality in this region.

show abstract

Temporal variations in groundwater nitrogen under intensive groundwater/surface-water interaction

Cited by 22 publications

References 56 publications

Seasonal variation of hydrochemical characteristics of open-pit groundwater near a closed metalliferous mine in O’Kiep, Namaqualand Region, South Africa

Seasonal variation of hydrochemical characteristics of open-pit groundwater near a closed metalliferous mine in O’Kiep, Namaqualand Region, South Africa

Ammonium-Nitrogen (NH4+-N) Removal from Groundwater by a Dropping Nitrification Reactor: Characterization of NH4+-N Transformation and Bacterial Community in the Reactor

Assessment of Spatial and Seasonal Nitrate Variation of Groundwater in the Irrigated Perimeter (Tadla Plain- Morocco)

Contact Info

Product

Resources

About