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P. Bragiel, P. Ficek, W. Prochwicz, I. Radkowska and N. Veeraiah

Abstract

A series of glasses of the composition 20Na2-O-15CaO-5B2O3-5SiO2-(55 - x) P2O5:xMnO2, was prepared and characterized by XRD, DSC, SEM, and Raman techniques. The samples were later immersed in simulated body fluid (SBF) for checking the potential growth of hydroxyapatite layer (HA). Experiments confirmed that addition of manganese oxide leads to structural changes of the glasses. With increasing content of MnO2, the surface of the samples became more congenial for improving the growth of HA. The formation of HA layer on the surface of the samples was confirmed just after seven days of immersion. The growth rate of HA has gradually increased with the increase of MnO2 content.

Open access

Iwona Markiewicz-Górka, Lidia Januszewska, Aleksandra Michalak, Adam Prokopowicz, Ewa Januszewska, Natalia Pawlas and Krystyna Pawlas

;2011:870125. doi: 10.1155/2011/87012 10. Ljung K, Vahter M, Berglund M. Manganese in Drinking Water. Institutet för miljömedicin, IMM-rapport nr 1/2007 [displayed 30 October 2014]. Available at http://www.imm.ki.se/Datavard/Rapporter/Manganrapport2007.pdf 11. Jiang Y, Zheng W. Cardiovascular toxicities upon manganese exposure. Cardiovasc Toxicol 2005;5:345-54. doi: 10.1385/ CT:5:4:345 12. World Health Organization (WHO). Manganese in Drinkingwater. Background document for development of WHO Guidelines for Drinking-water Quality

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S.-H. Joo and S.M. Shin

Abstract

The metal extraction from spent CMB catalyst using supercritical CO2(scCO2) was investigated with single organic system, binary organic system and ternary organic system to extract metal ions. Leaching solution of spent CMB catalyst containing 389 mg L−1 Co2+, 187 mg L−1 Mn2+, 133 mg L−1 Na+, 14.97 mg L−1 Ca2+ and 13.2 mg L−1 Mg2+. The method consists of scCO2/ligands complexation process and metal extraction process at 60°C and 200bar. The result showed the Co and Mn was selectively extracted from Mg, Ca and Na in the ternary system of mixture of Cyanex272, DEA and Alamine304-I.

Open access

Juraj Fazekaš, Danica Fazekašová, Ondrej Hronec, Eva Benková and Martin Boltižiar

Abstract

This paper is focused on the impacts of alkaline and metal deposition on soil and vegetation in the immission field of magnesium factory Jelšava-Lubeník (Slovakia). Soil samples and the foliage of vegetation were obtained from the Jelšava-Lubeník area with specific alkaline pollutants. The examined area is one of the most devastated regions of Slovakia. From the point of view of environmental regionalization, it belongs to an environmentally damaged area of Category 3. The total content of heavy metals in the soil and vegetation (Pb, Zn, Cr, Mn, Mg) were determined by atomic absorption spectrometry and X-ray fluorescence spectrometry. Soil reaction was determined in a solution of 0.01 M CaCl2. Vegetation was assessed by the Braun-Blanquet scale. In conclusion, we can say that spray particles of free magnesium oxide (MgO) strongly influence soil reaction, diversity, and vegetation cover. The research showed that the investigated sites were mostly strongly alkaline; the contents of Cr, Mn and Mg were over the toxicity limit, while the measured values of Pb and Zn did not exceed the limits set by the law. The values that measured significantly above the set limit show contamination that can be considered harmful and toxic. In the monitored species, that is, Agrostis stolonifera, Elytrigia repens and Phragmites australis, an over-limit content of Pb and Zn and toxic contents of Mg and Mn were found.

Open access

Petra Roupcová, Karel Klouda, Markéta Weisheitelová and Bohdan Filipi

References Basri, N.H., Dolah, B.N.M. Physical and electrochemical properties of supercapacitor electrodes derived from carbon nanotube and biomass carbon. Int. J. Electrochem. Sci. 2013, 8: 257-273. Chen, W., Fan, Z., Gu, L., Bao, X., Wang, C. 2010. Enhanced capacitance of manganese oxide via confinement inside carbon nanotubes. Chemical Communications. 46(22): 3905-3907. DOI:10.1039/C000517G. Dong, X., Shen, W., Gu, J., Xiong, L., Zhu, Y., Li, H., Shi, J. 2006. MnO2-Embedded-in-Mesoporous-Carbon-Wall Structure for Use as Electrochemical

Open access

Mirosław Kobierski

officinale ) as an indicator of anthropogenic toxic metal pollution of environment’, Acta Sci. Pol., Zootechnica , vol. 10, 4: pp. 73-82. LINDSAY, WL, NORVELL, WA 1978, ‘Development of a DTPA soil test for zinc, iron, manganese, copper’, Soil Sci. Soc. J. vol. 42: pp. 421-428. LOMBI, E, WENZEL, WW, GOBRAN, GR, ADRIANO, DC 2001, ‘Dependency of phytoavailability of metals on indigenous and induced rhizosphere processes: a review’, Gobran G.R., Wenzel W.W., Lombi E. (Eds.). Trace Elements in the Rhizosphere, CRC Press, Boca Raton, pp. 3

Open access

N Arnold, C Chong and M Binns

References 1. Arnold, N. P.: Grey flue-cured tobacco in Quebec; Canadex 181.532, Agriculture Canada, 1983. 2. Arnold, N., C. Chong and M. Binns: A comparative study of the mineral nutrients in grey and nongrey flue-cured tobacco; Can. j. Plant Sci. 61 (1981) 703-710. 3. Bonner, C. E.: Toxicity of manganese to Turkish tobacco in acid Kentucky soils; Soil Sci. 39 (1935) 15-33. 4, Cochran, W. G., and G. M. Cox: Experimental de-. signs; John Wiley & Sons, Inc., New York, N.Y., 1968

Open access

H.Z. Khan, Abdullah, M. Amin, N. Akbar, M.F. Saleem and A. Iqbal

Abstract

Micronutrients play a significant role in various plant metabolic processes and are required in much smaller amount by the plants as compared to the macronutrients. An experiment was conducted during 2011, at the Agronomic research area, University of Agriculture, Faisalabad, Pakistan, to investigate the response of autumn planted maize to ZnSO4 and MnSO4 levels (10, 20 and 30 kg ha-1) and in combinations (5 kg ha-1 ZnSO4 + 5 kg ha-1 MnSO4, 10 kg ha-1 ZnSO4 + 10 kg ha-1 MnSO4 and 15 kg ha-1 ZnSO4 + 15 kg ha-1 MnSO4). The randomized complete block design (RCBD) having three replicates was used with plot size of 3 m x 6 m. The crop was planted on ridges 75 cm apart with recommended plant to plant distance of 25 cm. Maximum values for plant height at maturity (225 cm), cob diameter (4.29 cm), number of grains per cob (415), biological yield (20.15 tons ha-1), grain yield (7.42 tons ha-1) and seed protein content (8.96%) were recorded where 15 kg ha-1 ZnSO4 + 15 kg ha-1 MnSO4 was applied.

Open access

P. Pokorný

. Degradation and crystalline reorganization of hureaulite crystals during the manganese phosphating of a high strength steel, Surface and Coating Technology 2015 , 275, e10-e20. 8. Lin B, Lu J. Self-healing mechanism of composite coatings obtained by phosphating and silicate sol post-sealing, Transactions of Nonferrous Metals Society of China 2014 , 24, 2723-2728. 9. Pokorný P, Szelag P, Novák M, Mastný L, Brožek V. Thermal stability of phosphate coatings on steel, Metalurgija 2015 , 54(3), 489–492. 10. Morks MF. Magnesium phosphate treatment for

Open access

Łukasz Majchrzycki, Monika Michalska, Mariusz Walkowiak, Zbigniew Wiliński and Ludwika Lipińska

al. (2007). Effect of particle dispersion on high rate performance of nano-sized Li4Ti5O12 anode. Electrochimica Acta 52, 6470-6475. DOI: 10.1016/j.electacta.2007.04.070. 5. Tarascon, J.M. & Armand, M. (2001). Issues and challenges facing rechargeable lithium batteries. Nature 414, 359-367. DOI: 10.1038/35104644. 6. Kovacheva, D. et al. (2002). Synthesizing nanocrystalline LiMn 2 O 4 by a combustion route. J. Mater. Chem. 12, 1184-1188. DOI: 10.1039/b107669h. 7. Thackeray, M.M. (1997). Manganese oxides for