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Bulletin of the Polish Academy of Sciences. Chemistry
EN In this paper the system: Mn2(+)-malonic acid-H2504-KBrO3 was investigated. The reaction occurred in a state far from equilibrium because a flow-through reactor was used. By measuring the platinum electrode potential and bromide ion selective electrode potential for the system studied a bifurcation [...]
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Bulletin of the Polish Academy of Sciences. Chemistry
EN The magnetic properties of [Mn12012(CH3COO)1s(H20)4), Mnl2Ac, a mixed valence cluster originally reported by the Wrocław School 'are reviewed. This is the first molecular cluster which has been discovered to undergo slow relaxation of the magnetization at low temperature. The relaxation time of the [...]
3
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Journal of Ecological Engineering
2016 Vol. 17, nr 4 228--231
EN Rising demands concerning water treatment and conservation make it necessary to search for more effective as well as cheap and ecologically safe solutions. During the filtration process quartz sand is replaced by filter materials which also have a strong effect on account of reactions taking place o[...]
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Zeszyty Naukowe. Mechanika / Politechnika Opolska
EN The structure of ductile cast iron is formed from graphite and basic metal matrix, which is composed from pearlite, ferrite and alternatively their mixture and other structural components (steadite, inclusion). The cast iron with ferrite matrix is characterized by quite high plasticity, toughness, a[...]
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Archives of Metallurgy and Materials
2018 Vol. 63, iss. 4 1883--1888
EN The paper deals with the influence of manganese in AlSi7Mg0.3 alloy with higher iron content. Main aim is to eliminate harmful effect of intermetallic – iron based phases. Manganese in an alloy having an iron content of about 0.7 wt. % was graded at levels from 0.3 to 1.4 wt. %. In the paper, the ef[...]
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Journal of Ecological Engineering
2018 Vol. 19, nr 5 180--185
EN This paper reports the work to determine the impact that concentrations of manganese (Mn) and iron (Fe) in the bottom sediments of shallow dam reservoirs exert upon the dissolved oxygen concentrations of overlying waters. Specifically, the work was conducted in the period of 2013–2014 in six shallow[...]
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Journal of Casting & Materials Engineering
EN This article is the effect of industrial work and many surveys in the one of the Polish foundries that specialize in aluminum alloys. The main goal of our explorations is to evaluate the influence of manganese on Al-Si alloy properties. In die-cast alloys, it is recommended to use larger amounts of [...]
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Acta Geophysica
2013 Vol. 61, no. 4 831--847
EN Previously, little attention has been paid to terrestrial radioisotopes (U, Th, 40K) occurring in manganese ores, despite the fact that the biogeochemical relationship between Mn and U is versatile. Occurrence of terrestrial radioisotopes in great amounts during mining on a long-term causes signific[...]
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Oceanological and Hydrobiological Studies
EN This paper reports the results of Mn accumulation in two species of green algae: Chara globularis and Chara hispida. The results of laboratory and field experiments show a rapid accumulation of Mn by charophytes and demonstrate that deposit formation on the plant surface in the so-called adsorption [...]
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Polish Journal of Chemistry
2006 Vol. 80, nr 11 1789-1797
EN A new complex, [Mn(quin-2-c)2(Him)2] (quin-2-c = quinoline-2-carboxylate ion, Him = imidazole), was synthesized by self assembly and its structure was determined by X-ray analysis. The compound crystallizes in the centrosymmetric space group C2/c with the Mn atom on a twofold axis, a = 18.091(6) Alf[...]
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Polish Journal of Chemistry
EN New hexagonal ternary phases R2-yMnzMnxAl17-x have been obtained in the Mn-rich regions of the R-Mn-Al (R = Gd, Tb, Dy, Ho, Er) systems: Gd2-yMnxAl17-x (0_y_0.15, 13.0 _x_ 15.1); Tb2-yMnxAl17-x (0_ y_0.23, 13.2_x_15.2); Dy2-yMnxAl17-x (0_y<~0.2, 11.9_x _14.6); Ho2-yMnxAl17-x (0_y<~0.2, 11.5_x_14.2) [...]
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Physicochemical Problems of Mineral Processing
EN Recovery and separation of cobalt and manganese from one of zinc plant residues (ZPR), namely hot filter cake (HFC) using a hydrometallurgical process was studied. The process is carried out in four steps as follows: (1) washing zinc, (2) reductive leaching with hydrogen peroxide, (3) cadmium cement[...]
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Physicochemical Problems of Mineral Processing
EN The aim of this study was to investigate manganese and zinc recoveries from spent zinc-carbon and alkaline battery powder. The effect of sulfuric acid concentration, ascorbic acid dosage, reaction temperature and leaching time on zinc and manganese dissolutions was investigated. The optimum reductiv[...]
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Journal of Ecological Engineering
EN The purpose of this study was to determine the influence of the soil fertilizer UGmax on zinc, copper and manganese contents in potato tubers. A three – year field experiment was carried out on soil which belonged to a very good rye complex. The experiment was established according to randomized spl[...]
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Physicochemical Problems of Mineral Processing
EN In this paper, recovery of manganese and zinc from alkaline battery paste by leaching under atmospheric condition using elemental sulfur as a reductive agent and sulfuric acid was investigated. Different dissolution parameters, acid concentrations, liquid-to-solid ratios, reaction temperatures, leac[...]
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Archives of Metallurgy and Materials
EN Copper, manganese and tin are commonly used as pearlite promoter elements in cast irons. A number of studies have been aimed at quantitatively evaluate the effect of each of these elements, individually or at given levels of the others. As a matter of fact, while tin may be necessary for achieving a[...]
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Proceedings of ECOpole
2008 Vol. 2, No. 2 363--367
PL Przeanalizowano warunki oznaczania manganu(II) w ekstraktach glebowych metodą woltamperometrii stripingowej w technice różnicowej pulsowej z użyciem wiszącej rtęciowej elektrody kroplowej. Mangan z gleb ekstrahowano mieszaniną HCl + HNO3 (3:1). Elektrolitem podstawowym był 0,2 mol · dm–3 bufor amono[...]
EN Conditions of determination of manganese(II) in soil extracts using differential pulse stripping voltammetry at hanging mercury drop electrode have been optimized. Manganese was extracted from soils with HCl + HNO3 mixture (1:3). 0.2 M ammonia/ammonium chloride buffer (pH = 8÷9) was the supporting e[...]
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Archiwum Odlewnictwa
PL W pracy przedstawiono wyniki badań właściwości mechanicznych spiekanych ferrytycznych proszków stali nierdzewnej AISI 434L modyfikowanych manganem, niklem i krzemem. Stwierdzono, iż własności mechaniczne modyfikowanej spiekanej ferrytycznej stali nierdzewnej AISI 434L zależą w dużej mierze od tego, [...]
EN Mechanical properties of sintered ferritic stainless steel AISI 434L modified by manganese, nickel and silicon were inwestigated. The mechanical properties were depended mainly on microstructure which was obtained after sintering process not on densification of sintered materials. The manganese addi[...]
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Journal of Ecological Engineering
EN The study was conducted in the years 1999–2001 in a meadow with the following fertilizer combinations: control object (without fertilizer), NPK mineral fertilization, fertilizing with manure, manure with NPK fertilization, fertilizing with spent mushroom substrate; spent mushroom substrate with NPK [...]
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Polish Journal of Chemistry
2009 Vol. 83, nr 8 1413-1421
EN Quantitative X-ray diffraction analysis coupled with the reverse Monte Carlo simulation technique has been made for characterizing the structure of iron oxyhydroxides and oxides formed from green rust (GR) with manganese ions and nickel ions in aqueous solution. The main component of GR(ox) was foun[...]
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