Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 4
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

Time of concentration, Tc, is defined as time elapsed from the beginning of rainfall infiltrated into soil layer until it reaches a constant infiltration rate (fc) which is indicated an equilibrium subsurface flow rate. In hydrological view, time of concentration plays a significant role in elaboration of transformation of rainfall into runoff in a watershed. The aims of this research are to define influence of soil density and soil water content in determining time of concentration using infiltration concept based on water balance theory, and to find out the effect of land slope this time. Watershed laboratory experiment using rainfall simulator was employed to examine time of concentration associated with infiltration process under different slope, soil density and soil water content based on water balance concept. The steady rainfall intensity was simulated using sprinklers which produced 2 dm3∙min–1. Rainfall, runoff and infiltration analysis were carried out at laboratory experiment on soil media with varied of soil density (d) and soil water content (w), where variation of land slopes (s) were designed in three land slopes 2, 3 and 4%. The results show that relationship between soil density and land slope to time of concentra-tion showed a quadratic positive relationship where the higher the soil density address to the longer time of concentration. Moreover, time of concentration had an inverse relationship with soil water content and land slope that means time of con-centration decreased when the soil water content increased.

Go to article

Authors and Affiliations

Donny Harisuseno
Dian Noorvy Khaeruddin
Riyanto Haribowo
Download PDF Download RIS Download Bibtex

Abstract

In this work, source apportionment for unsupported 210Po was conducted. The activity size distributions of both supported and unsupported 210Po in urban aerosols were measured from February to December 2019. The results confirmed that the activity of 210Po in the atmosphere is significantly increased by additional 210Po content related to coal combustion by-product releases, especially in the cold winter season. The sources of this content are local emissions and long-range transport processes. Unsupported activity concentrations of 210Po and weather parameters (temperature, humidity, and wind velocity) were used for source apportionment from three heating systems.
Go to article

Bibliography

1. Aba, A., Ismaeel, A., Al-Boloushi, O., Al-Shammari, H., Al-Boloushi,A. & Malak, M. (2020). Atmospheric residence times and excess of unsupported 210Po in aerosol samples from the Kuwait Bay-Northern Gulf, Chemosphere, 261, 127690, DOI: 10.1016/j.chemosphere.2020.127690
2. Adu J. & Vellaisamy, Kumarasamy, M. (2020). Mathematical model development for non-point source in-stream pollutant transport. Archives of Environmental Protection , 46, 2, pp. 91–99, DOI 10.24425/aep.2020.133479
3. Baskaran, M. (2011). Po-210 and Pb-210 as atmospheric tracers and global atmospheric Pb-210 fallout: a Review, Journal of Environmental Radioactivity, 102, pp. 500-513.
4. Behbehani, M., Uddin, S. & Baskaran, M.( 2020). 210Po concentration in different size fractions of aerosol likely contribution from industrial sources, Journal of Environmental Radioactivity, 222, 106323.
5. Botezatu, E., Grecea, C. & Botezatu, G.(1996). Radiation exposure potential from coal-fired power plants in Romania Vienna, International Congress On Radiation Protection.
6. EURACOAL, (2020).European Association for Coal and Lignite, Coal Industry across the Europe 7-th edition, ISSN 2034-5682.
7. Filizok, I. & Gorgün A.U., (2019).Atmospheric depositional characteristics of 210Po, 210Pb and some trace elements in Izmir, Turkey, Chemosphere, 220, pp. 468-475.
8. Hirose, K., Kikawada, Y, Doi, T. Su, C.C. & Yamamoto, M.(2011). 210Pb deposition in the Far East Asia: controlling factors of its spatial and temporal variations, Journal of Environmental Radioactivity, 102, pp. 514–519.
9. Carvalho, F., Fernandes, S., Fesenko, S., Holm, E., Howard, B., Martin, P., Phaneuf, M., Porcelli, D., Pröhl, G. & Twining, J. (2017). The environmental behaviour of polonium technical reports series No. 484. International Atomic Energy Agency Vienna.
10. Długosz-Lisiecka, M. & Bem, H. (2020).Seasonal fluctuation of activity size distribution of 7Be, 210Pb, and 210Poradionuclides in urban aerosols, Journal of Aerosol Science, 144, 105544.
11. Długosz-Lisiecka, M., (2016). The sources and fate of 210Po in the urban air: a review, Environment International, 94, pp.325–330.
12. Długosz-Lisiecka, M., (2019). Chemometric methods for source apportionment of 210Pb, 210Bi and 210Po for 10 years of urban air radioactivity monitoring in Lodz city, Poland, Chemosphere, 220, pp. 163-168.
13. Długosz-Lisiecka, M., (2015). Excess of Polonium-210 activity in the surface urban at-mosphere, Part 1, Fluctuation of the 210Po excess in the air, Environ. Sci.: Processes Impacts, 17(2), pp. 458-464, a.
14. Długosz-Lisiecka, M., (2015). Excess of Polonium-210 activity in the surface urban atmosphere. Part 2. Origin of 210Poexcess, Environ. Sci.: Processes Impacts, 17(2), pp. 465-470, b.
15. Ioannidou, A., Eleftheriadis, K., Gini, M.,Gini, L.,Manenti, S. & Groppi, F.(2019).Activity size distribution of radioactive nuclide 7Be at different locations and under different meteorological conditions. Atmospheric Environment, 212, pp. 272-280.
16. Kaynar, S.Ç., Kaynar ,U.H., Hiçsönmez, Ü. & Sevinç, O.Ü. (2018).Determination of 210Po and 210Pb depositions in lichen and soil samples collected from Köprübaşı-Manisa, Turkey, Nuclear Science and Techniques, 29, DOI: 10.1007/s41365-018-0428-7.
17. Lozano, R. L., San Miguel, E. G. & Bolívar, J. P.(2011).Assessment of the influence of in situ 210Bi in the calculation of in situ 210Po in air aerosols: Implications on residence time calculations using 210Po/210Pb activity ratios, Journal of Geophysical Research, 116, D08206, DOI: 10.1029/2010JD014915.
18. Mertens, J., Lepaumier, H., Rogiers, P., Desagher, D., Goossen,sL., Duterque, A., Le Cadre, E., Zarea,M. & Blondeau, J.(2020).Webber M., Fine and ultrafine particle number and size measurements from industrial combustion processes: Primary emissions field data, Atmospheric Pollution Research, 11, 4, pp. 803-814.
19. Marley, N.A., Gaffney, J. S., Drayton, P.J., Mary, M. Cunningham, K. Orlandini, A. & Paode, R. (2000). Measurement of 210Pb, 210Po and 210Bi in Size-Fractionated Atmospheric Aerosols: An Estimate of Fine-Aerosol Residence Times. Aerosol Science and Technology 32, pp.569- 583.
20. Nowina-Konopka, M. (1993). Radiological hazard from coal-fired power plants in Poland. Radiat. Prot. Dosim. 46 (3), pp. 171–180.
21. Nelson A.W., Eitrheim E.S., Knight A.W., May D. & Schultz M.K. (2017). Polonium-210 accumulates in a lake receiving coal mine discharges—anthropogenic or natural? Journal of Environmental Radioactivity, 167, pp. 211-221.
22. Ozden, B., Gule,r E.,Vaasma, T.,Horvath, M.,Kiisk, M. & Kovacs, T. (2017). Enrichment of naturally occurring radionuclides and trace elements in Yatagan and Yenikoy coal-fired thermal power plants. Turkey, Journal of Environmental Radioactivity, 188, pp. 100-107.
23. Ozden, B., Vaasma, T., Kiisk, M. & Tkaczyk, A.H. (2016). A modified method for the sequential determination of 210Po and 210Pb in Ca-rich material using liquid scintillation counting, Journal of Radioanalytical and Nuclear Chemistry, 311 (1), pp. 365-373.
24. Ouyang, J., Song, L.-J., Ma, L.-L, Luo, M. & Xu, D.-D. (2018) .Temporal variations, sources and tracer significance of Polonium-210 in the metropolitan atmosphere of Beijing, China, Atmospheric Environment, 193, 2018, pp. 214-223.
25. Pham, M.K., Betti, M., Nies, H. & Povinec, P. (2011).Temporal changes of 7Be, 137Cs and 210Pb activity concentrations in surface air at Monaco and their correlation with mete-orological parameters, Journal of Environmental Radioactivity, 102, 11, pp. 1045-1054.
26. Poluszyńska J. (2020). The content of heavy metal ions in ash from waste incinerated in domestic furnaces. Archives of Environmental Protection , 46 , 2 pp. 68–73
27. Sabuti, A.A. & Mohamed, C.A.R. (2011).Natural Radioisotopes of Pb, Bi and Po in the Atmosphere of Coal Burning Area, Environment Asia, 4, pp. 49-62, DOI: 10.14456/ea.2011.18.
28. Sabuti, A.A. & Mohamed, C.A.R. (2013). Residence time of Pb-210, Bi-210 and Po-210 in the atmosphere around a coal-fired power plant, Kapar, Selangor, Malaysia, Pollution Research, 32, pp. 907-915.
29. Sówka I., Badura M., Pawnuk M., Szymański P. & Batog P. (2020). The use of the GIS tools in the analysis of air quality on the selected University campus in Poland. Archives of Environmental Protection, 46 , 1 pp. 100–106
30. Sýkora, I. & Povinec, P.P. (2020). Natural and anthropogenic radionuclides on aerosols in Bratislava air, Journal of Radioanalytical and Nuclear Chemistry, 325, pp. 245-252, DOI: 10.1007/s10967-020-07219-0
31. Szaciłowski, G., Ośko, J. & Pliszczyński, T. (2019). Determination of 210Po in air filters from metallurgic industry, Journal of Radioanalytical and Nuclear Chemistry, 322, pp. 1351–1356, DOI: 10.1007/s10967-019-06858-2
32. Vaasma, T., Loosaar, J., Gyakwaa, F., Kiisk, M., Özden, B. & Tkaczyk, A.H. (2017). Pb-210 and Po-210 atmospheric releases via fly ash from oil shale-fired power plants, Environmental Pollution. 222, 210-218.
33. Vecchi, R., Piziali, F.A.,Valli, G., Favaron, M. & Bernardoni, V. (2019). Radon-based estimates of equivalent mixing layer heights: A long-term assessment. Atmospheric Environment, 197, pp. 150-158.
34. Wasielewski R., Wojtaszek M. & Plis A. (2020). Investigation of fly ash from co-combustion of alternative fuel (SRF) with hard coal in a stoker boiler. Archives of Environmental Protection, 46, 2 pp. 58–67, DOI: 10.24425/aep.2020.133475
35. Yan G., Cho H.-M., Lee I. & Kim G., (2012). Significant emissions of 210Po by coal burning into the urban atmosphere of Seoul, Korea, Atmospheric Environment, 54, pp. 80-85.
Go to article

Authors and Affiliations

Magdalena Długosz-Lisiecka
1
Karolina Nowak
1

  1. Lodz University of Technology, Institute of Applied Radiation Chemistry, Łódź, Poland
Download PDF Download RIS Download Bibtex

Abstract

Seed coating technology combined with biopolymers offers an alternative method to reduce environmental contamination. However, when biological agents are incorporated, biopolymers would have diverse properties and effects. This underscores the necessity of exploring the optimal dosages and formulations of biopolymers to ensure the survival of beneficial microorganisms, seed quality, and proper storage. This study aimed to explore the effects of different sodium alginate and chitosan coating formulations on Trichoderma harzianum viability and canola seeds quality. The coating process involved mixing T. harzianum powder with sodium alginate, talc and chitosan in different doses, sequences and formulations. Trichoderma harzianum viability was assessed through colony-forming units per ml over time. Canola seed quality was evaluated by measuring radicle emergence, germination percentage, seedling growth, and field emergence. Sodium alginate, both alone and in combination with talc, improved T. harzianum viability immediately after treatment and during storage. These coatings did not impair seed germination and improved canola root growth. Among the different chitosan formulations, a 1 : 100 ratio in talc improved strain survival and root growth without affecting germination, radicle, and field emergence. Coating canola seeds is a practical alternative to the application of T. harzianum, sodium alginate and talc, as it preserves their viability over time and improves seedling performance. Chitosan formulations in acetic acid should be carefully developed to prevent negative effects on seeds or biological agents.
Go to article

Authors and Affiliations

Cyntia Lorena Szemruch
1
ORCID: ORCID
Marta Monica Astiz Gassó
2
Federico Augusto García
1
Carola Gonçalves Vila Cova
3
Silvia Sanchez
3
Yanina Ibáñez
4
Antonella Colinas
3

  1. Faculty of Agricultural Sciences, Institute of Research on Agricultural Production, Environment, and Health (IIPAAS), National University of Lomas de Zamora, Llavallol, Argentina
  2. Phytotechnical Institute of Santa Catalina, National University of La Plata, La Plata, Argentina
  3. Faculty of Agricultural Sciences, National University of Lomas de Zamora, Llavallol, Argentina
  4. Faculty of Agricultural Sciences, Institute of Research on Agricultural Production,Environment, and Health (IIPAAS), National University of Lomas de Zamora, Llavallol, Argentina

This page uses 'cookies'. Learn more