Contamination of soil and water contributes to the reduction of economic income, and also has an impact on economic development and management organizations and services. In order toavoid excessive use of nitrate fert...Contamination of soil and water contributes to the reduction of economic income, and also has an impact on economic development and management organizations and services. In order toavoid excessive use of nitrate fertilizers we maderesearch through systematic laboratory study of applying the basic chemical and physical analyzes of selected soil samples. In this research, we apply the method that was studied movement of nitrate solution in two soil types (sand and loess), since the impact of fertilizers on the environment depends on the soil types and its category. As the result, we got accurate functional dependences of sufficiently step height of soil and the concentration of nitrate ions and those can find a specific application in agriculture for these two types of soil, and may be sufficiently adequate substitution for the field investigations. The aim of the study was to investigate the most important negative environmental and economic consequences of the using of artificial fertilizers and to show that soil tests in the laboratory can be an adequate substitute for a field test because of economic savings. The comparative analysis of experimental and numerical results for nitrates leaching in different soil types were concluded.展开更多
Potassium tungstophosphate is supported on BEA zeolite by in situ synthesis for glyphosate removal. Spectroscopic measurements identified hydrogen bonding as a primal interaction of potassium salt and BEA zeolite. Com...Potassium tungstophosphate is supported on BEA zeolite by in situ synthesis for glyphosate removal. Spectroscopic measurements identified hydrogen bonding as a primal interaction of potassium salt and BEA zeolite. Composites are evaluated for glyphosate herbicide removal and adsorption process is analyzed using two isotherm models. Obtained adsorption capacities for all prepared composites lay between 45.2 and 92.2 mg of glyphosate per gram of investigated composite. Suspension acidity revealed that glyphosate is adsorbed mainly in the zwitter-ion form at the composite surface while the amount of potassium salt in the composites is crucial for the adsorption application. Exceptional adsorption behavior is postulated to come from a high degree of homogeneity among surface active sites which is confirmed by different experimental methods. Temperature programmed desorption of glyphosate coupled with mass spectrometer detected one broad, high-temperature peak which represents overlapped desorption processes from active sights of similar strength.Introduction of potassium tungstophosphate affects active sites present in BEA zeolite for glyphosate desorption and significantly increases the amount of adsorbed pesticide in comparison to BEA zeolite. Supporting of potassium tungstophosphate on BEA zeolite via in situ synthesis procedure enables the formation of highly efficient adsorbents and revealed their perspective environmental application.展开更多
文摘Contamination of soil and water contributes to the reduction of economic income, and also has an impact on economic development and management organizations and services. In order toavoid excessive use of nitrate fertilizers we maderesearch through systematic laboratory study of applying the basic chemical and physical analyzes of selected soil samples. In this research, we apply the method that was studied movement of nitrate solution in two soil types (sand and loess), since the impact of fertilizers on the environment depends on the soil types and its category. As the result, we got accurate functional dependences of sufficiently step height of soil and the concentration of nitrate ions and those can find a specific application in agriculture for these two types of soil, and may be sufficiently adequate substitution for the field investigations. The aim of the study was to investigate the most important negative environmental and economic consequences of the using of artificial fertilizers and to show that soil tests in the laboratory can be an adequate substitute for a field test because of economic savings. The comparative analysis of experimental and numerical results for nitrates leaching in different soil types were concluded.
基金the Ministry of Education,Science and Technological Development of the Republic of Serbia(Nos.OI172018,OI172043 and III45006)
文摘Potassium tungstophosphate is supported on BEA zeolite by in situ synthesis for glyphosate removal. Spectroscopic measurements identified hydrogen bonding as a primal interaction of potassium salt and BEA zeolite. Composites are evaluated for glyphosate herbicide removal and adsorption process is analyzed using two isotherm models. Obtained adsorption capacities for all prepared composites lay between 45.2 and 92.2 mg of glyphosate per gram of investigated composite. Suspension acidity revealed that glyphosate is adsorbed mainly in the zwitter-ion form at the composite surface while the amount of potassium salt in the composites is crucial for the adsorption application. Exceptional adsorption behavior is postulated to come from a high degree of homogeneity among surface active sites which is confirmed by different experimental methods. Temperature programmed desorption of glyphosate coupled with mass spectrometer detected one broad, high-temperature peak which represents overlapped desorption processes from active sights of similar strength.Introduction of potassium tungstophosphate affects active sites present in BEA zeolite for glyphosate desorption and significantly increases the amount of adsorbed pesticide in comparison to BEA zeolite. Supporting of potassium tungstophosphate on BEA zeolite via in situ synthesis procedure enables the formation of highly efficient adsorbents and revealed their perspective environmental application.
