Temat: manganese ion - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effect of manganese ions addition orders on the flotation behavior of scheelite
Autorzy:: Lu, Kuanwei
Chen, Rong
Zhang, Ying
Luo, Hongying
Yang, Hu
Cai, Jiaozhong
Powiązania:: https://bibliotekanauki.pl/articles/1845215.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: manganese ion
addition order
scheelite
sodium silicate
flotation
Opis:: In this study, the effect of MnCl2 on scheelite flotation with sodium oleate (NaOL) as a collector and sodium silicate as a depressant was assessed by a combination of flotation experiments, Fouriertransform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and solution chemistry. The flotation experiments confirmed that the addition of MnCl2 before sodium silicate showed an adverse effect on flotation and the recovery of scheelite gradually decreased as the amount of MnCl2 was increased. When MnCl2 was added afte r sodium silicate, the recovery of scheelite gradually increased with an increase in the amount of MnCl2. The results of FTIR, XPS, and solution chemistry indicated that MnCl2 acted on the surface of scheelite in the form of manganese ions. When MnCl2 was added before sodium silicate, manganese ions adsorbed on the surface of scheelite reacted with sodium silicate to form a hydrophilic silicate, which covers the surface of scheelite and blocks the adsorption of NaOL. However, when MnCl2 was added after sodium silicate, manganese ions are continued to be adsorbed on the surface of scheelite, which increases the cations on the surface of scheelite, and hence the condition becomes conducive for the interaction between scheelite and NaOL.
Źródło:: Physicochemical Problems of Mineral Processing; 2020, 56, 5; 860-873
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Changes in the sorption of manganese and iron ions under the effect of differentiated oxygenation and reaction of the soil
Autorzy:: Jackowska, I
Gaszczyk, R.
Powiązania:: https://bibliotekanauki.pl/articles/796106.pdf
Data publikacji:: 1993
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: dynamic method
iron ion
reaction
manganese ion
oxygenation
soil
sorption
protection
agricultural environment
heavy metal
Opis:: The study is concerned with the course of sorption of Fe²⁺, Fe³⁺ and Mn²⁺ ions and with their washing, out with distilled water in sandy, loess, and loamy soils. Sorption was conducted according to the idynamic method. ODR and Eh were measured as indices of soil oxygenation. It was found that oxygen deficiency of the soils under study, with a change in their reaction from acid to neutral, resulted in: 1. an increase in the sorption of Fe²⁺ and Fe³⁺ ions, 2. an increase in the sorption of Mn²⁺ ions in the loamy soil only.
Źródło:: Zeszyty Problemowe Postępów Nauk Rolniczych; 1993, 400
0084-5477
Pojawia się w:: Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Usage of Sorbent-Catalyst to Accelerate the Oxidation of Manganese
Autorzy:: Gomelya, Mykola
Tverdokhlib, Mariia
Shabliy, Tetyana
Linyucheva, Olga
Powiązania:: https://bibliotekanauki.pl/articles/1839661.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: manganese(II) ion
oxidation
catalyst
sorbent
modified cation exchange resin
water purification
magnetite
Opis:: The processes of manganese (II) ions removal from water using sorbent catalysts and ion exchange materials modified with iron oxides were studied. It was shown that manganese ions oxidize very slowly in artesian water, even when the pH is adjusted to 9.0. Intensive aeration of solutions due to stirring also does not promote the oxidation of manganese (II) ions. The degree of manganese extraction due to oxidation is reduced from 20–30% for solutions with a concentration of manganese ions of 1 and 5 mg/dm3 to 11–15% for solutions with a concentration of 15 and 30 mg/dm3. A significant increase in the oxidation efficiency of manganese ions was achieved by using magnetite as a sorbent catalyst. The efficiency of water demanganization increases along with the intensity of water aeration when mixing solutions. It was established that strongly acid cation exchangers provide efficient extraction of manganese ions from water. At the same time, a high exchange capacity of strong acid cation exchange resin KU-2–8 in acid and salt form was noted. It was shown that the capacity of manganese ions of this cation exchange resin in the Ca2+-form is slightly lower. When using the KU-2–8 in Ca2+-form of cation exchange resin to remove manganese ions from the solution already in the first samples, the leakage of manganese ions at the level of 10 mg/dm3 and above was observed. This indicates that this form of ion exchanger is not suitable for deep purification of water from manganese (II) ions. In order to increase the efficiency of manganese ion extraction from water, increase the duration of the filter cycle, magnetite and magnetite-modified KU-2–8 cation exchange resin were used as a sorbent-catalyst. It was shown that the cation exchange resin modified with magnetite provides the removal of a significant part of manganese ions due to catalytic oxidation on magnetite. The conditions of effective manganese extraction under static and dynamic conditions are determined.
Źródło:: Journal of Ecological Engineering; 2021, 22, 4; 232-239
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Wplyw jonow magnezu na wzrost drozdzy piekarskich Saccharomyces cerevisiae
Autorzy:: Raczynska-Cabaj, A
Lipinska, E
Sobczak, E
Powiązania:: https://bibliotekanauki.pl/articles/826850.pdf
Data publikacji:: 2003
Wydawca:: Polskie Towarzystwo Technologów Żywności
Tematy:: drozdze piekarskie
wzrost drozdzy
jony magnezu
bioakumulacja
magnez
drozdzownictwo
hodowla laboratoryjna
Saccharomyces cerevisiae
baker's yeast
yeast growth
manganese ion
bioaccumulation
manganese
yeast industry
laboratory culture
Opis:: Sprawdzono wpływ dodatku MgS04 7 H20 na wydajność biomasy komórkowej drożdży piekarskich. Zbadano również zdolność wiązania magnezu przez drożdże podczas hodowli na podłożu YPG i w warunkach przemysłowych. W skali przemysłowej ustalono, że celowe jest zwiększanie dodatku magnezu w poszczególnych propagacjach. W hodowli laboratoryjnej plon biomasy uzyskany z podłoża kontrolnego był istotnie mniejszy od plonów z hodowli doświadczalnych wzbogaconych w magnez (stężenie Mg 2+: 0,05; 0,3 i 0,5 g Mg2+ · dm-3 podłoża). Zaobserwowano, że wzrost zawartości magnezu w podłożu powodował zwiększenie ilości tego pierwiastka w biomasie komórkowej drożdży piekarskich.
The influence of addition of MgS04-7H20 on biomass yield of Saccharomyces cerevisiae was evaluated in this study. Capacities of binding magnesium ions by S. cerevisiae yeast during cultivation on the YPG-medium (laboratory) and in the industrial scale were analyzed. It was stated that in the industrial conditions the higher amount of magnesium in the respective propagation is required. In the laboratory conditions the yield of yeast cultivated on the experimental media enriched with different amount (0,05, 0,3 and 0,5 g ·dm-3) of magnesium ions was also significantly higher than the yield from YPD - control medium. Growing concentration of magnesium ions in the experimental media caused the increasing of magnesium content in the yeast biomass.
Źródło:: Żywność Nauka Technologia Jakość; 2003, 10, 4; 69-76
1425-6959
Pojawia się w:: Żywność Nauka Technologia Jakość
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Influence of manganese deficiency on metal ion uptake, antioxidant defense mechanism and lipid peroxidation levels in Mentha piperita leaves
Autorzy:: Candan, N.
Tarhan, L.
Powiązania:: https://bibliotekanauki.pl/articles/19798.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: manganese deficiency
metal ion
metal uptake
lipid peroxidation
Mentha piperita
leaf
antioxidant defense system
metal concentration
Opis:: We investigated the antioxidant defense mechanism, metal uptake and lipid peroxidation (LPO) levels at different leaf positions in Mentha piperita L. grown in Mn2+-deficient and control conditions. Under manganese deficiency the activity of superoxide dismutase (SOD), catalase (CAT) and guaiacol peroxidase (GuaPOX) and the content of ascorbate, chlorophyll, and carotenoid under Mn2+ deficiency were significantly lower than in the control for all leaf positions. SOD activity correlated positively with Mn2+ uptake. Fe2+ uptake was inhibited by Mn2+ deficiency. During early stages of Mn2+ deficiency, M. piperita leaves showed relatively more antioxidant activity and lower LPO. Towards the final stages of the treatment period, comparatively lower SOD, CAT and GuaPOX activity and higher LPO levels accelerated the senescence process.
Źródło:: Acta Biologica Cracoviensia. Series Botanica; 2011, 53, 1
0001-5296
Pojawia się w:: Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:: Biblioteka Nauki

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