Wyniki wyszukiwania - AGRO

1

Exchange and sorption of orthophosphoric acid on Amberlite IRA-402

100%

Bartoszewicz J., Smoczynski L., Karp E.

Polish Journal of Soil Science

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2004

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tom 37

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nr 2

The processes of exchange and sorption of orthophosphoric acid on Amberlite IRA-402 were studied. The concentrations of phosphate phosphorus and hydrogen ions were determined in initial and equilibrium solutions. It was found that there is a linear dependence between the amounts of phosphorus exchanged and/or sorbed in the model system tested (Amberlite) and the quantity and concentration of H3PO4. At a certain amount and concentration of H3PO4, the pH of the equilibrium solution containing Amberlite was lower than the pH of the initial solution. The paper provides an explanation of this phenomenon based on appropriate chemical equations of super-stoichiometric ion exchange and super-exchange sorption.

2

Sorption of nickel in soils of an area affected by the metal industry

88%

Wasylewicz R., Kostecki J., Greinert A., Walczak B., Drab M.

Polish Journal of Soil Science

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2014

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tom 47

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nr 2

The analysed area was used for industrial activity for over 130 years. During that time many pollutants (including heavy metals) have been emitted by industrial plants and infiltrated into the soil. This article presents the properties of the soil from industrial sites located in Zielona Góra and analysis of its physical and chemical characteristics.

3

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Development of technology for obtaining water-soluble bacterial melanin and determination of some of pigment properties

75%

Aghajanyan A. E., Vardanyan A. A., Hovsepyan A. C., Hambardzumyan A. A., Filipenia V., Saghyan A. C.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2017

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tom 98

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nr 4

4

Water vapour sorption on mixtures of podzolic soils with organic fertiliser Rosahumus

75%

Skic K., Sokolowska Z.

Acta Agrophysica

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2015

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tom 22

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nr 3

Water vapour sorption processes on mixtures of soil and organic fertiliser Rosahumus (RH) were investigated. Mixtures were prepared with Orthic Luvisol soil formed from loamy sand and Haplic Luvisol soil formed from loess. Samples contained different doses of fertiliser in the range from 1 to 50 weight percent. Differences in water vapour sorption on Rosahumus (RH) as well as the soils were observed. The properties of soil mixtures and organic material depended on the properties of both components and on the dose of Rosahumus. However, fertiliser was a dominant factor in sorption processes of investigated mixtures. Adsorption isotherms obtained by gravimetric method belonged to the same type II, in accordance to the BET classification. Significantly higher influence on the water vapour sorption was associated with fertiliser dose and was greater for mixtures with soil formed from loess. The increase of water vapour sorption was visibly higher for mixtures below 4% of Rosahumus content. On the other hand, greater concentration of RH resulted in similar amount of water vapour sorption and for Rosahumus dose of 50% the sorption was practically the same. Similar results were found for the maximum hygroscopicity (Mh) of mixtures. Strong correlation was observed between the Mh and the amount of added organic fertiliser with determination coefficient (R2) from 0.997 to 0.998.

5

Selection of material suitable for permeable reactive barriers in the vicinity of landfills

75%

Fronczyk J., Garbulewski K.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2009

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tom 41

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nr 1

6

Modelling equilibrium data for manganese(II) sorption onto manganese dioxide modified chalcedonite using the non-linear regression method

75%

Michel M. M., Kiedrynska L.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2011

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tom 43

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nr 2

7

Development of a fluidized batch process using natural powdered zeolite [clinoptilolite]

75%

Valentukeviciene M., Rimeika M.

Polish Journal of Environmental Studies

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2007

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tom 16

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nr 2

The purpose of this research was to examine water treatment improvement by using natural powdered zeolite (clinoptilolite). Experiments were carried out at a laboratory and in a pilot-scaled water treatment plant. The pilot-scaled plant was fed with groundwater containing a high level of organic compounds from the existing waterworks in Lithuania’s Neringa Region. The content of organic substances in the groundwater – characterized by chemical oxygen demand (COD), varied between 5.0 – 40.0 mg O₂ l⁻¹ and the permanganate index (oxidation by potassium permanganate) 4.0 – 8.0 mg O₂ l⁻¹ was determined during this case study. There was no significant reduction using conventional water treatment. Laboratory analysis of water quality showed: total iron, ammonium, aluminium residual concentrations, pH, colour (Pt scale), turbidity, COD and permanganate index. The drinking water had an undesirable colour, taste and odour due to high concentrations of organic substances in the groundwater. A fluidized batch process and adsorption of natural powdered zeolite were used for reducing organic substances in the water with the effectiveness of total iron concentration reduction by 96%. Experimental research results are included in the article.

8

N2O emission and sorption in relation to soil dehydrogenase activity and redox potential

75%

Wlodarczyk T., Stepniewski W., Brzezinska M., Kotowska U.

International Agrophysics

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2002

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tom 16

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nr 3

9

Sorption of pesticides in soil and compost

75%

Zbytniewski R., Buszewski B.

Polish Journal of Environmental Studies

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2002

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tom 11

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nr 2

A study was carried out on the sorption of the sparingly water-soluble pesticide linuron in various types of soil with different levels of organic matter. The sorption isotherms of the pesticide were obtained in bathequilibrium experiments and the data were fit to Freundlich and Dual Reactive Domain Models. In general, the sorption was the highest for the soil with greatest content of soil organic matter. The study also points out the global problem of handling the sewage sludge at wastewater treatment plants. We studied the compost made in Torun's Wastewater Treatment Plant during sludge fermentation. To characterise the compost organic matter UV-Vis and 13C CP/MAS NMR spectroscopy were used. Consequences of the compost use in agriculture are also discussed here. Particular attention is given to the changes in the behaviour of pesticides applied to soil in the presence of compost organic substances. The treatment of soils by the compost from sewage sludge may lead to increased retention or removal of hydrophobic compounds like linuron.

10

Comparison of P-sorption selected indices in soils with different physico-chemical properties

75%

Domagala-Swiatkiewicz I., Wit M.

Polish Journal of Soil Science

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2003

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tom 36

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nr 1

In laboratory investigations, 9 methods of sorption ability against phosphorus in 36 soils of southern Poland (loam 7-71% , Corg 0.41-2.0%, Alox 14.7-64.8 mmol kg -1 and Feox 15.7-174.5 mmol kg-1) were compared. Evaluation of the maximum P sorption (Pmax) as well as two ways of buffering capacity against P (PBC) was estimated from multipoint curves according to the data of the Langmuir and Freundlich equation. The indices of P sorption obtained were compared with the single-point indices received by the addition to the soil of one P concentration (PSI1500, IPEC, and PRI200). All the indices of P sorption determined were highly correlated, being the evidence of the usability of the single-point indices in the evaluation of phosphorus sorption in routine soil tests. A significant correlation was found between the indices compared of Alox, Feox, loam concentration and CEC in the soil. The saturation of the soil with phosphorus, estimated by the Pox / (0.5(Feox + Alox ) was low and was in the range in 0.7-8.6 %.

11

Higroskopijnosc utworow murszowych poddanych dzialaniu podwyzszonej temperatury

63%

Sokolowska Z., Hajnos M.

Acta Agrophysica

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2001

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tom 53

147-158

12

Hygric properties of gelatine-based adhesives

63%

Bachtiar E. V., Sehaqui H., Niemz P.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2014

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tom 85

13

Phosphorus sorption capacity of different types of opoka

63%

Cucarella V., Zaleski T., Mazurek R.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2007

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nr 38

11-18

The bedrock opoka has been lately reported as an appropriate reactive media for onsite wastewater treatment systems due to its high phosphorus (P) sorption capacity. However, variations on its chemical composition may affect its reactivity with P, therefore leading to a variable P removal effi ciency. In this paper, the P-sorption capacity of three different types of opoka from the region of Miechów, Poland, is reported. According to the silica and carbonate content, opoka samples were classifi ed as light--weight and heavy-weight opoka. When heated over 900°C, opoka showed a very high P-sorption capacity that was well correlated to its Ca content. P-sorption isotherms from batch experiments with an artifi cial P solution were plotted and fi tted to the Langmuir and Freundlich adsorption models. The Freundlich isotherm appeared to model better the P-sorption of light opoka and the Langmuir isotherm of heavy opoka, suggesting different dominating mechanisms of P-sorption by light and heavy opoka.

14

Purification and some properties of RNA polymerase II from bovine adrenal cortex

63%

Gorzelanczyk E. J., Trzeciak W. H.

Bulletin of the Polish Academy of Sciences. Biological Sciences

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1991

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tom 39

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nr 3

15

Influence of outer energy on rye grain temperature distribution in model silo

63%

Kusinska E.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

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2003

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tom 03

16

Prediction of the adsorption coefficients for imidazolium ionic liquids in soils using cyanopropyl stationary phase

63%

Mrozik W., Nichthauser J., Stepnowski P.

Polish Journal of Environmental Studies

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2008

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tom 17

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nr 3

383-388

Because of potential widespread application of ionic liquids in industrial processes, they should be evaluated before being allowed to enter the environment. The sorption of the substance on soil and sediment is an essential parameter in a new approach of chemical design. The HPLC method involving cyanopropyl-reversed phases for determining sorption coefficients may be an alternative tool in predicting the soil sorption properties of a variety of compounds in comparison to traditional laboratory methods. We obtain significant correlation of capacity factors, log k’, and organic carbon normalized sorption coefficients, log K oc, for the set of homologous ionic liquids (1-alkyl-3-methylimidazolium salts) for meadow soils, CL1, CL2 and agricultural soils AG2, AG3 (R²=0.97, 0.97, 0.98 and 0.99, respectively). Results for marine sediment are also significant (R²=0.99). The correlation with forest soil, WO and peat, PE data is also reasonably good (R²= 0.92 and R²=0.94). However, the set including both 1-alkyl-3-methylimidazolium and 1-alkyl-3-ethylimidazolium salts gives good results only for CL1, AG2, PE soil and marine sediment SE (R²=0.93, 0.94, 0.95 and 0.94). These differences may be explained due to molecular structure of the ionic liquids used and properties of the soil (cation exchange capacities and organic matter content).

17

Metoda perspektywna usuwania metali ciężkich z wód podziemnych zachodniej Ukrainy

63%

Trach Y.

Acta Scientiarum Polonorum. Architectura

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2020

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tom 19

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nr 1

Na Ukrainie największymi odbiorcami wód podziemnych jako źródła wody pitnej są mieszkańcy zachodniej części kraju. Ze względu na obecność stref pękania skał wodoodpornych w regionach hydrogeologicznych zachodniej Ukrainy skład fizykochemiczny wody nie jest stały i może ulegać zmianie, w szczególności w zakresie zawartości metali ciężkich. Przyczyną ich obecności w wodach podziemnych są oddziaływanie antropogeniczne oraz biologiczne ługowanie rud mineralnych. Metale ciężkie mogą migrować w dół i w górę oraz przenikać do warstw wodonośnych wody pitnej przez pęknięte strefy warstw wodoodpornych. Rudy mineralne występujące na terytorium zachodniej Ukrainy zawierają metale ciężkie, a zdecydowana większość z nich to siarczki. Są one utleniane przez grupę bakterii tionowych (рН 5–7), w wyniku czego stężenie siarczanu w wodzie wzrasta. Jednocześnie na zachodniej Ukrainie powszechnie występują glinokrzemiany (zeolity, tufy, bazalty i inne), które mogą być wykorzystane jako sorbent w technologii uzdatniania wody. W porównaniu z tradycyjnie stosowanym wapnem gaszonym przy wykorzystaniu glinokrzemianów wydajność usuwania metali ciężkich jest większa ze względu na to, że odbywa się za pomocą dwóch mechanizmów – wymiany jonowej i tworzenia wodorotlenków metali ciężkich.

18

Ammonia nitrogen removal in a filtration process by zeolite modified manganese bed

63%

Anielak A. M., Wojnicz M., Piaskowski K.

Archiwum Ochrony Środowiska

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2006

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tom 32

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nr 2

19

Sorption of copper and zinc ions by various cereal bran and collagen and elastin preparations

63%

Stachowiak J., Smigielska H.

Acta Scientiarum Polonorum. Technologia Alimentaria

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2004

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tom 03

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nr 1

Sorption of copper and zinc on wheat and rye bran as well as on collagen and elastin preparations under conditions simulating human digestive system parameters was determined. Results collected during this study indicate, that sorption abilities of investigated preparations are differential and depend on the origin source, as well as pH environment. Wheat and rye bran showed higher sorption ability. The value of copper and zinc sorption was between 39-82% and was lower for collagen and elastin (15-17%). Examined preparations show higher sorption ability when pH equals 8.7 and 6.8, and lower value of this parameter in an acidic environment.

20

The effect of extractive substances soluble in the alcohol-benzene mixture and in alkalies on some hygroscopic properties of birch wood

63%

Krutul D.

Annals of Warsaw Agricultural University. Forestry and Wood Technology

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1992

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tom 43

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