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1

Synthesis Optimization and Characterization of Microencapsulated N-P-K Slow-Release Fertilizers

100%

Neamţu C., Popescu M., Oancea F., Dima Ş.-O.

Open Chemistry

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2015

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vol. 13

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issue 1

EN

Slow-release microencapsulated N, P, and K fertilizer synthesis was optimized and the products exhaustively characterized. Four NPK formulations with nutrient mass ratios of 1:0:0, 1:1:0, 1:1:1, and 2:1:1 were characterized following European Council Regulation 2003/2003 for fertilizers as well as ICP-AES, 1H-NMR, FT-IR, HPLC, elemental analysis, XPS, SEM, dynamic light scattering, thermogravimetry, differential thermogravimetry, activity index, and leaching rate. These fertilizers have good slow-release properties and decrease waste and crop contaminants, improving environmental protection. Compared to classic granulated fertilizers, plant nutrient availability was improved allowing reduced application. Nutrient leaching parameters describing four different kinetic models were evaluated.

2

Production of compound mineral fertilizers as a method of utilization of waste products in chemical company Alwernia S.A.

100%

Malinowski P., Olech M., Sas J., Wantuch W., Biskupski A., Urbańczyk L., Borowik M., Kotowicz J.

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EN

The results of investigations on a possible utilization of waste products formed during the production of commercial and food inorganic salts are presented. Application of wastes in the production of compound fertilizers was suggested. The work covered a full research cycle starting from laboratory tests and ending on the production implementation. Fertilizer formulas were developed on the basis of laboratory tests. A possible production of fertilizers of suggested compositions was tested on a pilot plant scale. The compound fertilizer production with the use of waste raw materials was implemented in Chemical Company Alwernia S.A. It reduced the amount of wastes directed to industrial waste site.

3

Effect of indigenous microbes on growth and blister blight disease of tea plant

88%

Fauziah F., Setiawati M. R., Pranoto E., Susilowati D. N., Rachmiati Y., Fauziah F., Setiawati M. R., Pranoto E., Susilowati D. N., Rachmiati Y.

Journal of Plant Protection Research

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2019

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vol. 59

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issue 4

4

Preparation methods of calcium sulphate and urea adduct

75%

Malinowski P., Biskupski A., Głowiński J.

Polish Journal of Chemical Technology

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2007

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vol. 9

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issue 4

111-114

EN

The paper presents the results of laboratory studies on the preparation of calcium sulphate and urea adduct by: grinding, compacting and mixing in the presence of physical water. A method for the measurement of urea conversion into the adduct form, which is based on the difference in solubility of free urea and the adduct bound urea CaSO4·4CO(NH2)2 in n-butanol, was developed. Mixing the reagents in the presence of physical water produced the best results. High urea conversion into the adduct form, over 85%, in the prepared samples indicates that this method can be successfully used to get CaSO4·4CO(NH2)2 adduct.

5

Utilization of waste gypsum in fertilizer production

75%

Malinowski P., Borowik M., Wantuch W., Urbańczyk L., Dawidowicz M., Biskupski A.

Polish Journal of Chemical Technology

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2014

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vol. 16

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issue 1

45-47

EN

The results of the study regarding utilization of the waste gypsum formed as a by-product during the production of the magnesium sulphate from dolomite have been presented. The use of this waste have been proposed for the production of granulated multi-component fertilizers containing 25% N; 8% S; 14% CaO and 3.5% MgO. In the process of fertilizer production, the urea which will be bounded with the calcium and magnesium sulphate from the waste in the form of adducts of CaSO4 . 4CO(NH2)2 and MgSO4 . CO(NH2)2 . 3H2O will be the source of nitrogen in the fertilizer. It has been stated on the basis of the laboratory tests that the fertilizer with the assumed composition can be obtained by means of granulation of the raw material pulp, along with the dried and ground product return. The possibility of the production of the fertilizer with good physical properties according to the assumed concept has been confirmed in the pilot scale

6

Effects of inoculation with mycorrhizae and the benefits of bacteria on physicochemical and microbiological properties of soil, growth, productivity and quality of table grapes grown under Mediterranean climate conditions

75%

Ed-dine S. S., Aberkani K., Said M., Haboubi K., Ghazal H., Ed-dine S. S., Aberkani K., Said M., Haboubi K., Ghazal H.

Journal of Plant Protection Research

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2021

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vol. 61

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issue 4

7

Biodegradable Polymer Composites with Nitrogen- and Phosphorus-Containing Waste Materials as the Fillers/Biodegradowalne Kompozyty Polimerowe Wypełnione Odpadami Zawierającymi Azot I Fosfor

51%

Treinyte J., Grazuleviciene V., Ostrauskaite J.

Ecological Chemistry and Engineering S

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2014

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vol. 21

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issue 3

515-528

EN

Composites consisting of polyvinyl alcohol, nitrogen- and phosphorus-containing waste materials were prepared and studied as materials for encapsulation of mineral fertilizers By-products of biodiesel production (rapeseed cake, crude glycerol), horn meal (waste product of haberdashery) and phosphogypsum (by-product of the production of phosphorus fertilizers) were used as the fillers of the composites. The films of the composites with the different amounts of nitrogen and phosphorus were prepared using different fillers or their mixtures. Mechanical, properties of the films, hygroscopicity, solubility in water were studied. The composites developed were used for the encapsulation of mineral fertilizers. It was established that encapsulation resulted in the increase of the time of release of the fertilizers. The developed slow-release fertilizers represent a combination of inorganic and organic compounds. The organic part consists of nitrogen- and phosphorus containing horn meal and rapeseed cake. Since assimilation of organic substances is considerably longer, nitrogen and phosphorus of these components will be available for plants much later than inorganic nitrogen and phosphorus. Thus the composite film will not only decrease the rate of desorption of the components from the granules of the fertilizers but will also prolong the impact of the fertilizers on the plants.

PL

Wytworzono materiały kompozytowe, składające się z alkoholu poliwinylowego, zawierające odpady z azotem i fosforem. Badano możliwości zastosowania tych materiałów do kapsułkowania nawozów mineralnych. Jako wypełniacze kompozytów były wykorzystywane produkty uboczne wytwarzania biopaliwa do silników wysokoprężnych (makuch rzepakowy, surowy glicerol), mączka rogowa (produkt odpadowy z produkcji pasmanteryjnej) i fosfogips (produkt uboczny produkcji nawozów fosforowych). Wytworzono folie kompozytowe z różnymi ilościami azotu i fosforu, różnymi wypełniaczami lub ich mieszaninami. Badano właściwości mechaniczne folii, ich higroskopijność i rozpuszczalność w wodzie. Otrzymane kompozyty zostały wykorzystane do kapsułkowania nawozów mineralnych. Stwierdzono, że kapsułkowanie spowodowało zwiększenie czasu uwalniania nawozów. Opracowane nawozy powolnego uwalniania stanowią kombinację związków nieorganicznych i organicznych. Organiczna część składa się z mączki rogowej i makucha rzepakowego, zawierających azot i fosfor. Ponieważ asymilacja substancji organicznych jest znacznie dłuższa, azot i fosfor z tych składników będą dostępne dla roślin znacznie później niż z substancji nieorganicznych. W ten sposób folia z kompozytu nie tylko zmniejszy szybkość desorpcji składników z granulek nawozów, ale również przedłuży wpływ nawozów na rośliny.

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Synthesis Optimization and Characterization of Microencapsulated N-P-K Slow-Release Fertilizers

Production of compound mineral fertilizers as a method of utilization of waste products in chemical company Alwernia S.A.

Effect of indigenous microbes on growth and blister blight disease of tea plant

Preparation methods of calcium sulphate and urea adduct

Utilization of waste gypsum in fertilizer production

Effects of inoculation with mycorrhizae and the benefits of bacteria on physicochemical and microbiological properties of soil, growth, productivity and quality of table grapes grown under Mediterranean climate conditions

Biodegradable Polymer Composites with Nitrogen- and Phosphorus-Containing Waste Materials as the Fillers/Biodegradowalne Kompozyty Polimerowe Wypełnione Odpadami Zawierającymi Azot I Fosfor