Location
D.P. Culp Center Ballroom
Start Date
4-5-2024 9:00 AM
End Date
4-5-2024 11:30 AM
Poster Number
133
Name of Project's Faculty Sponsor
Aleksey Vasiliev
Faculty Sponsor's Department
Chemistry
Competition Type
Competitive
Type
Poster Presentation
Presentation Category
Science, Technology and Engineering
Abstract or Artist's Statement
This study addresses the critical environmental issue of elevated nitrate levels in water bodies, primarily due to excessive use of nitrogenous fertilizers and improper waste disposal, leading to detrimental effects like eutrophication and health hazards such as blue-baby syndrome. Focusing on the necessity to reduce nitrate concentrations in polluted water to permissible levels, our research explores the effectiveness of hybrid materials in nitrate adsorption. We synthesized and studied nine distinct adsorbents using two processes: grafting and sol-gel techniques. This involved applying amino-containing molecules (such as bis[3-(trimethoxysilyl)propyl]amine, 3-(aminopropyl)trimethoxysilane, N-[3 (trimethoxysilyl)propyl]aniline, and benzylamine) onto silica gel surfaces, followed by acidification with HCl in dioxane solution to transform surface amino groups into ammonium moieties. The produced mesoporous adsorbents with high surface area were examined for their structural and chemical properties using Fourier-transform infrared spectroscopy, porosimetry and dynamic light scattering. Batch adsorption tests proved the high nitrate adsorption capacities of these adsorbents. Surfactant-free, sol-gel synthesized adsorbent demonstrated the highest efficiency attributed to its abundant amino group content. Additionally, the study of the temperature dependence of nitrate adsorption revealed its optimal removal at ambient temperature and a decrease of adsorption capacity at higher temperatures. This research contributes significantly to the development of efficient methods for nitrate removal from water, presenting a promising approach for environmental remediation.
Adsorption of nitrates from contaminated water on amino-modified porous materials
D.P. Culp Center Ballroom
This study addresses the critical environmental issue of elevated nitrate levels in water bodies, primarily due to excessive use of nitrogenous fertilizers and improper waste disposal, leading to detrimental effects like eutrophication and health hazards such as blue-baby syndrome. Focusing on the necessity to reduce nitrate concentrations in polluted water to permissible levels, our research explores the effectiveness of hybrid materials in nitrate adsorption. We synthesized and studied nine distinct adsorbents using two processes: grafting and sol-gel techniques. This involved applying amino-containing molecules (such as bis[3-(trimethoxysilyl)propyl]amine, 3-(aminopropyl)trimethoxysilane, N-[3 (trimethoxysilyl)propyl]aniline, and benzylamine) onto silica gel surfaces, followed by acidification with HCl in dioxane solution to transform surface amino groups into ammonium moieties. The produced mesoporous adsorbents with high surface area were examined for their structural and chemical properties using Fourier-transform infrared spectroscopy, porosimetry and dynamic light scattering. Batch adsorption tests proved the high nitrate adsorption capacities of these adsorbents. Surfactant-free, sol-gel synthesized adsorbent demonstrated the highest efficiency attributed to its abundant amino group content. Additionally, the study of the temperature dependence of nitrate adsorption revealed its optimal removal at ambient temperature and a decrease of adsorption capacity at higher temperatures. This research contributes significantly to the development of efficient methods for nitrate removal from water, presenting a promising approach for environmental remediation.