Industrial and agricultural wastes as a potential biofilter media for groundwater nitrate remediation

Özkaraova, Emre Burcu; Kalin, Robert M.; Gkiouzepas, Stylianos; Knapp, Charles W.

doi:10.5004/dwt.2019.25015

Cited by 3 publications

(2 citation statements)

References 38 publications

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“…The relatively low concentrations of nitrogen species correlate with the corn cob's total nitrogen content of 0.07%, as determined during chemical characterization. This suggests a minimal risk of secondary contamination during denitrification, supporting conclusions drawn in previous studies [18,42,55].…”

Section: Leaching Assaysupporting

confidence: 90%

“…Nitrogen released from corn cob primarily exists as nitrate, followed by ammonium and nitrite. However, the total nitrogen concentrations were comparatively lower than those observed in other reactive materials, such as mulch, compost [4], hazelnut shell [55], almond shell, and loofah sponge [4,18,55]. Carbon release amounted to 16.83 mg/g, contrasting with findings for almond shell and loofah sponge, which registered values of 6.32 mg/g and 21.95 mg/g, respectively [18].…”

Section: Leaching Assaymentioning

confidence: 58%

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Enhanced Biological Nitrate Removal from Groundwater in Humid Tropical Regions Using Corn Cob-Based Permeable Reactive Barriers: A Case Study from Panama

Sánchez Hidalgo,

Ortega,

Deago

2024

Water

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Nitrate contamination in groundwater is a global concern due to its widespread presence and consequential social, environmental, and economic ramifications. This study investigates the efficacy of biological denitrification in a humid tropical setting, utilizing corn cob in batch and column tests to assess nitrate removal under varying conditions. Batch tests demonstrated the nitrate removal efficiencies of 93.14%, 91.58%, 90.77%, and 98.74% for initial concentrations of 22.18 ± 2.82 mg/L, 27.3 mg/L, 69.1 ± 1.2 mg/L and 115.08 ± 1.88 mg/L, respectively. In the column test, the removal efficiency was 99.86%, 87.13%, and 74%, and the denitrification rate was 32.82, 53.43, and 83.53 mg NO3−-N/L d, for a hydraulic retention time (HRT) of 24 h, 16 h, and 7 h, respectively. Predominantly, nitrate removal occurred via biological denitrification, particularly favoring a 24 h HRT. The corn cob effectively removed high nitrate concentrations of up to 115 mg NO3−-N/L. Scanning electron microscopy and Fourier transform infrared spectroscopy revealed surface characteristic changes of the carbon source pre- and post-denitrification. This research sheds light on the potential of biological denitrification using corn cob in humid tropical environments, offering a promising avenue for addressing nitrate contamination challenges in groundwater systems.

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Section: Leaching Assaysupporting

confidence: 90%

Section: Leaching Assaymentioning

confidence: 58%

Enhanced Biological Nitrate Removal from Groundwater in Humid Tropical Regions Using Corn Cob-Based Permeable Reactive Barriers: A Case Study from Panama

Sánchez Hidalgo,

Ortega,

Deago

2024

Water

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Permeable reactive barriers for in situ remediation of nitrate-contaminated groundwater: A review

Hidalgo

Deago

Rosario

2022

2022 8th International Engineering, Sciences and Technology Conference (IESTEC)

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Development of Ecological Strategies for the Recovery of the Main Nitrogen Agricultural Pollutants: A Review on Environmental Sustainability in Agroecosystems

et al. 2021

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Nitrogen (N) is a fundamental nutrient for plant growth and for the performance of biological functions. In agroecosystems, nitrogen fertilization is aimed at providing a suitable N dose for crop growth, avoiding the impoverishment or the improper enrichment of nitrogen compounds in soil. The high application of nitrogen fertilizers is the main cause of the increase in nitrate leaching and loss of the quality of natural resources (groundwater and soil). In the last decades, new sustainable technological approaches have been developed and applied on laboratory and field scales to reduce the impacts of nitrogen pollution on the environmental matrices and to improve the sustainability of agricultural management. This review highlights the results of the implementation of sustainable remediation new strategies to reduce pollution from a main agricultural contaminant (nitrate) and describes the benefits obtained from the use of these solutions in agroecosystems.

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Industrial and agricultural wastes as a potential biofilter media for groundwater nitrate remediation

Cited by 3 publications

References 38 publications

Enhanced Biological Nitrate Removal from Groundwater in Humid Tropical Regions Using Corn Cob-Based Permeable Reactive Barriers: A Case Study from Panama

Enhanced Biological Nitrate Removal from Groundwater in Humid Tropical Regions Using Corn Cob-Based Permeable Reactive Barriers: A Case Study from Panama

Permeable reactive barriers for in situ remediation of nitrate-contaminated groundwater: A review

Development of Ecological Strategies for the Recovery of the Main Nitrogen Agricultural Pollutants: A Review on Environmental Sustainability in Agroecosystems

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