groundwater nitrogen Articles
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Controls on groundwater nitrogen contributions from on-site wastewater systems in coastal North Carolina
The goal of this study was to evaluate the influence of soil type and separation distance to water table on dissolved inorganic nitrogen concentrations in groundwater adjacent to on-site wastewater systems. Groundwater nitrogen species (NO3--N and NH4+-N) and groundwater levels adjacent to 16 on-site systems in three different soil groups (group I- sand, group II- coarse loams and group III ...
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Column-Based Remediation of Groundwater Nitrogen via Stimulation of Nitrification and Denitrification
ABSTRACT: A former research laboratory facility utilized a leach field for sanitary and aqueous laboratory waste. Surrounding soils and groundwater are impacted by ammonia and pH varies between 3.6 and 5. The feasibility of employing an in-situ, two-stage, nitrification/denitrification program was evaluated via a soil column study. The objectives of the study were to a) determine the efficacy of ...
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Removal of NO3– from groundwater by PP-g-AA-Am non-woven fabric using fixed-bed column reactors
This study investigated the effect of PP-g-AA-AM non-woven fabric on the removal of nitrate nitrogen from groundwater. The breakthrough time was 1.5–2.6, 2.5–5.5, and 6.2–12.2 h for a superficial velocity of 2.0, 1.0, and 0.5 cm/s, respectively, for the nitrate nitrogen concentration in groundwater to satisfy the safe standard for drinking of 10 mg/L (as per the Ministry of ...
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The public policies for reducing nonpoint water pollution between equity and efficiency
This paper investigates if and how equity and efficiency could be reconciled when improving nitrogen-polluted groundwater of agricultural origin. This is achieved through comparing two pollution control programmes with respect to their costs, water quality impacts and correlation between abatement cost and polluting emissions. The fieldwork was done in a watershed, near the French Alps. It was ...
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Spatial distribution of groundwater pollution in the Porsuk River Basin (PRB), Turkey
The groundwater in the alluvium aquifer of the Eskisehir Plain (EP) is polluted by wastewaters transported through Porsuk River, agricultural-industrial activities, river-groundwater interactions and unsanitary landfill. Porsuk River flows throughout the alluvium aquifer in the EP. In this study, the effects of anthropogenic activities on groundwater quality in the EP were investigated. Since the ...
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Integrated Constructed Wetlands: concept, design, site evaluation and performance
'Integrated Constructed Wetlands' (ICW) are a joined-up approach to land and water management. Significant synergies were achieved by explicitly combining environmental, ecological and aesthetic objectives. Intercepted precipitation was found to be the main factor determining treatment efficacy. Soil infiltration and evapo-transpiration combined to enhance hydraulic residence time. A wetland area ...
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The mathematical modelling of total nitrogen contamination transport via groundwater from a sugar factory in Eskisehir, Turkey
In this study, mathematical modelling of the total nitrogen contamination transport in a porous medium was evaluated in order to determine the potential groundwater pollution caused by a sugar factory in the Eskisehir region of Turkey. Analytical solutions of mathematical modelling were performed to show graphically the distributions of contaminant concentrations. Multiflow computer programming ...
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Groundwater/surface water interactions along the Curtiss reach of the San Pedro River.
A reach of the San Pedro River flows east of the Apache Powder Superfund Site and west of the Town of St. David in Cochise County, Arizona. As a result of the remedial investigations associated with the Superfund Site, this reach has been surveyed extensively since the mid-1980’s from approximately the Escalante Crossing to the Pomerene Diversion. In particular, the section downstream from ...
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Algae as a Gamechanger for Ecosystem Restoration
Moderator: Dr. Kuldip Kumar, Principal Environmental Scientist, MWRD Chicago The speakers for this session of the Algae Biomass Summit on Algae Ecosystem Restoration had over 100 years of experience combined. We had the pleasure of hearing them speak on how algae can help restore the ecosystem. This topic includes removal of harmful bloom, reducing fertilizer use through soil amendments, and ...
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Performance of a permeable reactive barrier for
in situ removal of ammonium in groundwaterNitrogen as ammonium (NH4+-N) is one of the most common nitrogen contaminants in groundwater; this is particularly true in the industrial and agricultural regions of northern China, where rapid population growth and economic development have stressed public water supplies and reduced groundwater quality. In this study, we report the performance of a zeolite permeable reactive barrier ...
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Application of the material flow analysis method for evaluating Strategic Sanitation Plan in Sub-Saharan Africa: the case of Fada N'Gourma–Burkina Faso
In the context of rapid urbanization across Sub-Saharan Africa there is a critical need for more robust decision-making between different ways of providing sanitation services in existing and new peri-urban areas. In several countries, authorities tried to find solutions by developing strategies to address sanitation problems in the form of Strategic Sanitation Plans. In Burkina, Strategic ...
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Nitrate Pollution of Groundwater
What are some of the environmental and health issues surrounding nitrate in groundwater, and options to resolve them? Nitrogen is a naturally occurring element that is essential for life on Earth. It makes up 78% of the air we breathe and is essential for plant and animal growth. However, when too much nitrogen is present in fresh water, it can cause environmental problems and contaminate ...
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Considerations for the mitigation of nitrate contamination: stable isotopes and insights into the importance of soil processes
Nutrient management is widely promoted to minimize the impact of intensive fertilizer use on groundwater quality, however watershed-scale stable isotope studies in eastern North America suggest nitrogen transport to groundwater is dominated by non-growing season fluxes derived principally from the mineralization and nitrification of soil organic matter. In the current field scale study, δ15N ...
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