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Wyszukujesz frazę "HCl" wg kryterium: Temat

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    Wyświetlanie 1-13 z 13
    Tytuł:
    Separation of HCl from the mixture of KCl and HCl using membrane distillation
    Autorzy:
    Tomaszewska, M.
    Mientka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/779695.pdf
    Data publikacji:
    2008
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    wydzielanie HCl
    destylacja membranowa
    HCl separation
    membrane distillation
    Opis:
    Membrane distillation (MD) was applied for the concentration of solutions containing hydrochloric acid and potassium chloride. The studies of the concentration and separation of HCl through the hydrophobic membrane were performed. In the investigations plate and frame or capillary modules, equipped with membranes from polytetrafluoroethylene and polypropylene were applied, respectively. The feed temperature amounted to 333 K or 343 K and permeate 293 K at the inlet of the module. Under the MD operation conditions the transfer of water vapour and hydrogen chloride from potassium chloride and hydrochloric acid solutions through the hydrophobic membranes took place, whereas the potassium chloride as a nonvolatile component underwent concentration in the feed. The influence of acid concentration and salt presence in the feed on the HCl molar flux through the membrane was systematically studied. The increase of the temperature and salt concentration in the feed caused higher partial pressure volatile of HCl and the resultant HCl Flux through a membrane was higher. During MD for the initial concentration in the feed equal 50 g KCl/dm3 and 40g HCl/dm3, at the feed temperature 343K, the permeate flux decreased from 353 dm3/m2d to 289 dm3/m2d, whereas the HCl flux increased to 6 mol/m2d for the capillary module. At higher KCl concentration in the feed, amounting to 100g KCl/dm3 and under the same operation conditions, the permeate flux decreased to 285 dm3/m2d, but the molar flux HCl increased to 18 mol/m2d. The results were compared with the data obtained for the plate and frame module.
    Źródło:
    Polish Journal of Chemical Technology; 2008, 10, 2; 27-32
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of creatine hydrochloride supplementation on physical performance and hormonal changes in soldiers
    Autorzy:
    Tayebi, Mohammad Milad
    Yousefpour, Mitra
    Ghahari, Laya
    Powiązania:
    https://bibliotekanauki.pl/articles/1932984.pdf
    Data publikacji:
    2021-05-19
    Wydawca:
    PPHU Projack Jacek Wąsik
    Tematy:
    creatine
    performance
    HCl
    hormones
    Opis:
    Purpose: The aim of this study was to examine the effects of 2 weeks of creatine hydrochloride (CrHCl) supplementation on physical performance and hormonal changes in army soldiers. Materials: Eighteen male army soldiers were randomly assigned in a double-blind fashion to either a CrHCl (n=9) or placebo (Pl) (n=9) groups. CrHCl group costumed 3g of creatine per day, whereas Pl group was given dextrose. Before and after supplementation period, the subjects performed a battery of performance tests including one repletion maximum (1RM) of bench press and back squat, vertical jump (VJ) and Wingate anaerobic test. In addition, blood samples were obtained to determine changes in testosterone and cortisol concentrations per and post supplementation. Results: There were significant increases in VJ, peak and mean power, and 1RM back squat test following the 2 weeks of CrHCl supplementation (p < 0.05) without any significant change for the Pl group. In addition significant changes were observed in testosterone and cortisol concentrations from before to after supplementation in CrHCl group (p < 0.05) and compared with Pl group (p=0.001). Conclusions: In conclusion, the present study indicates that CrHCl supplementation can improve VJ, power performance, 1RM back squat and hormonal changes in army soldiers.
    Źródło:
    Physical Activity Review; 2021, 1, 9; 93-99
    2300-5076
    Pojawia się w:
    Physical Activity Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Purification of halloysite by magnetic separation
    Autorzy:
    Sakiewicz, P.
    Lutynski, M.
    Soltys, J.
    Pytlinski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/110768.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    halloysite
    magnetic separation
    HCl treatment
    Opis:
    Rational use of mineral resources requires advanced separation methods in order to obtain high quality products. In this study chemical treatment with magnetic separation of halloysite from Dunino (Poland) is presented. Initial crushing, hydrochloric acid absorption treatment, sedimentation (settling) and polygradient magnetic separation in weak magnetic field were applied to separate aluminosilicates from iron and titanium oxides (impurities). The process allowed to obtain a product of approximately 98% purity of the aluminosilicate fraction (halloysite + kaolinite). The tailings from magnetic separation consisted of iron oxides, while the intermediate product consisted mainly of aluminosilicate and iron chlorides resulting from the HCl treatment. The obtained products can be used as a component of polymer nanocomposites, sorbents and in ceramics industry.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2016, 52, 2; 991-1001
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recovery of HCL from chloride leach solution of spent HDS catalyst by solvent extraction
    Autorzy:
    Banda, R.
    Nguyen, T.H.
    Lee, M.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/185588.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    HCl
    extraction
    stripping
    recovery
    TEHA
    wydobycie
    Opis:
    In the present work, amine based extractant and its mixture with cationic and solvating extractants were tested for the extraction of HCl from chloride solution containing Al(III). The chloride feed solution resulted from the leaching of spent HDS (hydro-desulfurization) catalysts. For this purpose, amine extractants, such as TOA (trioctyl amine), Alamine 336 (a mixture of tri-octyl/decyl amine), Alamine 308 (tri-isooctyl amine), and TEHA (tri 2-ethylhexyl amine) were used and the extraction and stripping behavior of HCl was compared. The extracted HCl was easily stripped from loaded TEHA phase, when compared with the other tested tertiary amine system. Solvent extraction reaction of HCl by TEHA was determined from the extraction data. Unlike TOA and Alamine 336, adding cationic extractant to TEHA had negligible effect on the extraction and stripping of HCl. In our experimental ranges, no Al was extracted by amines and pure HCl was recovered. MaCabe-Thiele diagrams for the extraction and stripping of HCl by TEHA were constructed.
    Źródło:
    Chemical and Process Engineering; 2013, 34, 1; 153-163
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extraction of titanium from Ti-doped seaside magnetite concentrate in HCl media
    Ekstrakcja tytanu z nadmorskiego koncentratu magnetytu domieszkowanego tytanem w środowisku HCl
    Autorzy:
    Kart, Elif Uzun
    Kırman, Mümin
    Powiązania:
    https://bibliotekanauki.pl/articles/2069763.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    seaside magnetite concentrate
    atmospheric HCl leaching
    titanium extraction
    nadmorski koncentrat magnetytu
    ługowanie
    warunki atmosferyczne HCl
    ekstrakcja tytanu
    Opis:
    The purpose of the present study was to extract high added value titanium from Ti-doped Seaside Magnetite Concentrated (Ti-SMC), which has a high potential reserve for Ti-Fe with 4–6% Ti, 50–52% F e, 1–2% Al, and 1–2% Mg content by applying innovative, economical, environmentally friendly methods. A gitaion HCl leaching was applied to the Ti-SMC sample at different leaching temperatures (25–50–75–90°C), at acid concentrations (8–10–12 N ), and leaching times (30–60–120–240 min) in atmospheric conditions. After the leaching experiments under the indicated conditions, the optimization of the leaching experiments was determined with Ti% recovery that dissoluted by elemental analysis, and the titanium recovery values reached the maximum value with increased leaching time at 50°C and 10 N HCl acid concentration; and 65% Ti was recovered in 30 minutes, 67% in 60 minutes, 74% in 120 minutes, and 82% Ti in 240 minutes. For Ti-SMC, leaching was carried out at 50°C leaching temperature and at 10 N acid concentration for 480 minutes, and a 92% Ti extraction value was achieved. According to the extraction results of all leaching experiments, the leaching temperature of 50°C, the acid concentration of 10 N , and the leaching time of 480 minutes were determined as the optimum conditions. In this study, it was emphasized that this resource is a potential reserve, which has not been used as a source before, with 92% Ti extraction with atmospheric acid leaching, which is an environmentally friendly method, consuming less energy than Ti-SMC, which is difficult and expensive to extract with traditional methods.
    Celem badań była ekstrakcja tytanu z nadmorskiego koncentratu magnetytu (Ti-SMC–Ti-doped Seaside Magnetite Concentrated), charakteryzującego się znacznym potencjałem rudy Ti-Fe zawierającej 4–6% Ti, 50–52% F e, 1–2% Al oraz 1–2% Mg, dzięki zastosowaniu innowacyjnych, ekonomicznych i przyjaznych dla środowiska metod ługowania. Ługowanie kwasem solnym HCl z mieszaniem zastosowano do próbek Ti-SMC w różnych temperaturach ługowania (25–50–75–90°C), przy stężeniach kwasu (8–10–12 N) i czasach ługowania (30–60–120–240 min) w warunkach atmosferycznych. Następnie dokonano optymalizacji eksperymentów ługowania z odzyskiem Ti%. Maksymalne wartości odzysku tytanu wystąpiły przy zwiększonym czasie ługowania w temperaturze 50°C i stężeniu kwasu solnego HCl 10 N; 65% Ti odzyskano w ciągu 30 min, 67% – w 60 minut, 74% – w 120 minut, a 82% – w 240 minut. W przypadku Ti-SMC ługowanie prowadzono w temperaturze 50°C i przy stężeniu kwasu 10 N przez 480 minut i otrzymano wartość ekstrakcji 92% Ti. Zgodnie z wynikami ekstrakcji we wszystkich eksperymentach ługowania jako optymalne warunki określono: temperaturę ługowania 50°C, stężenie kwasu 10 N i czas ługowania 480 minut. W pracy podkreślono, że surowiec ten stanowi potencjalną rezerwą, wcześniej niewykorzystywaną. Ekstrakcja 92% Ti z ługowaniem kwasem solnym w warunkach atmosferycznych jest metodą przyjazną dla środowiska, zużywającą mniej energii niż Ti-SMC, która jest trudna i droga do ekstrakcji tradycyjnymi metodami.
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2021, 37, 4; 79--96
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sustained Release of Drug Facilitated Through Chemically Crosslinked Polyvinyl Alcohol-Gelatin (PVA-GE) Hydrogels. A sustainable biomedical approach
    Autorzy:
    Ali, Shaukat
    Ranjha, Nazar Muhammad
    Ahmad, Bashir
    Khan, Ayaz Ali
    Hassan, Fakhr Ul
    Aziz, Tariq
    Alharb, Metab
    Alshammari, Abdulrahman
    Alasmari, Abdullah F.
    Alharbi, Mousa Esa
    Powiązania:
    https://bibliotekanauki.pl/articles/27315648.pdf
    Data publikacji:
    2023
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    hydrogel
    gelatin
    drug release
    ciprofloxacin HCl
    polyvinyl alcohol
    Opis:
    The present study aimed to prepare hydrogel based on polyvinyl alcohol (PVA) and gelatin (Ge) and characterization of PVA/Ge hydrogel for their potential use as a sustained drug delivery system. Polyvinyl Alcohol (PVA) and-Gelatin (Ge) were cross-linked using glutaraldehyde (GA) as a crosslinking agent and hydrochloric acid (HCl) as a catalyst. Different feed polymer ratio and crosslinking agent concentration were used to prepare a series of PVA/Ge hydrogels. The obtained PVA/Ge hydrogels were investigated for dynamic and equilibrium swelling studies. The effect of polymers ratio, degree of crosslinking and pH of the medium on swelling of PVA/Ge hydrogels was investigated. Furthermore, the values of diffusion coeficient (D), volume fraction, polymer-solvent interaction parameter, molecular weight between crosslink and crosslink density were calculated. For swelling studies, 0.05M USP phosphate buffer solutions of different pH (1.2, 5.5, 6.5 and 7.5) were used. For the drug release study, ciprofloxacin HCl was loaded into selected samples as a model drug. The release of drug from these samples was performed for 12 hours in USP phosphate buffers of pH 1.2, 5.5 and 7.5. The release data from these samples were fitted into various kinetic models like zero order, first order, Higuchi and Peppas models to investigate the release mechanism. It was found that by varying the composition of PVA/Ge hydrogel and GA concentration, a significant difference was observed in drug release kinetics. FTIR spectroscopy and X-ray diffraction were used for the characterization of hydrogels. PVA/Ge hydrogel showed sustained release of the model drug at various pH values suggesting its potential use as a sustained drug delivery system.
    Źródło:
    Polish Journal of Chemical Technology; 2023, 25, 2; 56--65
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Separation of rare earth elements from the leaching solution of waste phosphors by solvent extraction with Cyanex 272 and its mixture with Alamine 336
    Autorzy:
    Xing, Weidong
    Lee, Man Seung
    Powiązania:
    https://bibliotekanauki.pl/articles/1449503.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    phosphors
    rare earth elements
    HCl solution
    solvent extraction
    Cyanex 272
    Opis:
    Waste phosphors contain rare earth elements (REEs) such as yttrium (Y), europium (Eu), cerium (Ce), terbium (Tb) and lanthanum (La). Separation of these REEs from the leaching solution of waste phosphors was investigated by solvent extraction with single Cyanex 272, binary mixture (mixture of Cyanex 272 and Alamine 336), ionic liquid (prepared by Cyanex 272 and Aliquat 336) in kerosene. The effect of solution pH and extractants concentration was mainly investigated. The results indicated that Y(III) was selectively extracted by single Cyanex 272 over the other four REEs from the HCl solution with initial pH range from 3 to 5. Synergistic extraction with the binary mixture was enough for the extraction of Y(III), Tb(III) and Eu(III) with a small amount of Ce(III). Scrubbing with pure Y(III) solution with intermediate acidity was effective in scrubbing Ce(III) from the loaded binary mixture organic phase. Stripping behavior of the Y(III), Tb(III) and Eu(III) by HCl solution was similar to each other. Tb(III) and Eu(III) can be separated by extraction with the binary mixture followed by scrubbing with pure Tb(III) solution. McCabe-Thiele diagrams were constructed for the extraction of Y(III) by single Cyanex 272 and that of Tb(III) by the mixture. A process was proposed for the separation of REEs from the leaching solution of waste phosphors by solvent extraction.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 1; 184-194
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Composite Barrier to Control the Corrosion of Mild Steel in Oil Well
    Autorzy:
    Singh, Rajesh Kumar
    Thakur, Manjay Kumar
    Kumar, Parshun
    Powiązania:
    https://bibliotekanauki.pl/articles/1030680.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    HCl
    Mild steel
    Saline water
    composite barrier
    filler
    thermal parameters
    Opis:
    Mild steel is a very important engineering metal. Petrochemical industries are used bulk amount for their various purposes like recovery of crude oil, refinery units and transportation. Crude oil is a very highly viscous liquid for the opening of the month well strong HCl acid and saline water is used. They produce hostile environment of mild steel. Gaseous substances like CO2 and SO2 gases are found into the well of petroleum. Large amount of saline water are used during recovery of crude oil in this water CO2 and SO2 are dissolved to produce H2CO3 and H2SO4. These acids create an acidic medium of mild steel. Saline waters have possessed Cl¯ ions. It produces ambient environment for mild steel. The solution of salty water contains dissolve oxygen which develop corrosive environment of mild steel. These major corrosive substances are available during recovery of crude oil and they form corrosion cell with base metal. Metal produces galvanic, pitting, stress, crevice, intergranular corrosion. Nanocaoting and filler methods are used to protect metal in such un-friendly environment. The corrosion rate of metal was calculated by weight loss experiment in absence and presence of nanocoating and filler materials. The synthesized organic compound octahydrodibenzo[a,d][8]annulene-5,12-dihydrazone is applied for nanocoating and MgS as filler. The coating and filling works were completed by chemical vapour deposition and nozzle spray method. Potentiostat used for determination corrosion potential and corrosion current density. The surface adsorption was studied by thermal parameters like activation energy, heat of adsorption, free energy, enthalpy and entropy. The thermal parameters results were shown that coating and filler compounds were adhered with base metal by chemical bonding. The thermal results were calculated by Arrhenius equation and Langmuir isotherm. The coating and the filler substance formed composite barrier with metal and developed a protective barrier for the corrosive substances.
    Źródło:
    World Scientific News; 2020, 139, 2; 155-172
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of moxifloxacin hydrochloride in AVELOX pharmacological formulations using modified potentiometer sensors
    Oznaczanie chlorowodorku moksyfloksacyny w formulacjach farmakologicznych AVELOX przy użyciu zmodyfikowanych czujników potencjometrycznych
    Autorzy:
    Kumar, Sachin
    Sindhu, Sushil K.
    Kumar, Praveen
    Sharma, Amit
    Sagadevan, Suresh
    Powiązania:
    https://bibliotekanauki.pl/articles/2088258.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    AVELOX
    moxifloxacin HCL
    ion-selective electrodes
    sodium tetraphenylborate
    phosphomolybdic acid
    phosphotungstic acid
    poly(vinyl chloride)
    potentiometry
    moksyfloksacyna HCL
    elektrody jonoselektywne
    tetrafenyloboran sodu
    kwas fosfomolibdenowy
    kwas fosfowolframowy
    poli(chlorek winylu)
    potencjometria
    Opis:
    Three different carbon paste (CP), silk-screen (SP) and poly (vinyl chloride) (PVC) modified electrodes were obtained to verify the reliability of AVELOX, the generic name of which is Moxifloxacin HCl (AV-MOXH). The sensing membranes were containing AVELOX ion associated complexes with sodium tetraphenylborate (NaTPB), phosphomolybdic acid (PMA), phosphotungstic acid (PTA), and ammonium reineckate (RN) as electroactive materials. All three electrodes gave fast, viable, and near-Nernstian linear responses over a relative wide concentration range that ranged from 1.010-6 to 1.010-2 mol/L AV-MOXH at 25°C with a monovalent cationic decrease. The sensors demonstrated a good discernment of AV-MOXH from numerous inorganic and organic compounds such as glucose, sucrose, Na+, Ca+, etc. Additionally, the isothermal coefficients along with selectivity coefficients were calculated. The modified Screen Printed Electrode sensor appeared to be highly sensitive for the determination of AV-MOXH. The electrode response was observed in pH range 2–6 for ISPE electrodes and IPVC electrodes and 3–7 for ICPE electrodes under various temperature conditions. The short response time, lifetime validity, recovery, and all the methods of validation such as limit of detection and limit of quantification were estimated. The potentiometric method turned out to be suitable for determining AV-MOXH in pharmacological formulations, and the findings obtained are comparable to the “HPLC official method” in terms of the agreement. As a result, the postulated potentiometric approach was verified in accordance with IUPAC guidelines.
    Otrzymano trzy różne elektrody modyfikowane pastą węglową (CP), sitodrukiem (SP) i polichlorkiem winylu (PVC), w celu oceny skuteczności działania leku AVELOX (nazwa rodzajowa Moxifloxacin HCl, AV-MOXH). Membrany czujników zawierały kompleksy jonu AVELOX z tetrafenyloboranem sodu (NaTPB), kwasem fosfomolibdenowym (PMA), kwasem fosfowolframowym (PTA) i soli Reineckego (RN) jako materiałami elektroaktywnymi. Wszystkie trzy elektrody dały szybkie i bliskie zależności liniowe Nernsta w zakresie stężeń AV-MOXH od 1.0-10-6 do 1.0-10-2 mol/l (w 25°C). Elektrody wykazały dobrą selektywność w oznaczaniu AV-MOXH względem wielu jonów i związków organicznych i nieorganicznych, jak glukoza, sacharoza, Na+, Ca+ itp. Dodatkowo obliczono współczynniki izotermiczne oraz współczynniki selektywności. Zmodyfikowany czujnik z elektrodą sitodrukową okazał się być bardzo czuły do oznaczania AV-MOXH. Badania prowadzono w zakresie pH 2–6 w przypadku elektrod ISPE i IPVC oraz 3–7 w przypadku elektrod ICPE w różnych temperaturach. Oszacowano czas odpowiedzi elektrod, ich czas życia, możliwość regeneracji, odzysk oraz granicę wykrywalności i granicę oznaczalności. Metoda potencjometryczna okazała się być odpowiednia do oznaczania AV-MOXH w preparatach farmakologicznych, a uzyskane wyniki są porównywalne z „oficjalną metodą HPLC”.
    Źródło:
    Polimery; 2021, 66, 11-12; 589--601
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Affective Computing-A Rationale for Measuring Mood With Mouse and Keyboard
    Autorzy:
    Zimmermann, P.
    Guttormsen, S.
    Danuser, B.
    Gomez, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/90061.pdf
    Data publikacji:
    2003
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    affective computing
    mood
    emotions
    HCl
    klawiatura
    pozycja przy pracy
    komputer
    zagrożenia zdrowia
    emocjonalność
    psychologia pracy
    Opis:
    Emotions are an increasingly important factor in Human-Computer Interaction (HCI). Up to the present, emotion recognition in HCI implies the use of explicit or intrusive methods, for example, video cameras or physiological measurements. We are developing and evaluating a method for the measurement of affective states through motor-behavioral parameters from standard input devices (mouse and keyboard).
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2003, 9, 4; 539-551
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Bottom Deposit Supplement on Trace Element Content in Light Soil
    Wpływ dodatku osadu dennego na zawartość pierwiastków śladowych w glebie lekkiej
    Autorzy:
    Baran, A.
    Jasiewicz, C.
    Tarnawski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/388262.pdf
    Data publikacji:
    2010
    Wydawca:
    Towarzystwo Chemii i Inżynierii Ekologicznej
    Tematy:
    osad denny
    pierwiastki śladowe
    gleba lekka
    wyciągi: 0,01 mol CaCl2
    1 mol HCl dm3
    bottom deposit
    trace elements
    light soil
    0.01 mol CaCl2 dm–3 extract
    1 mol HCl dm–3 extract
    Opis:
    The research aimed at an assessment of bottom deposit supplement effect on the content and mobility of selected trace elements in light soil. The investigations demonstrated a positive effect of bottom deposit on increasing light soil pH. After a two-year research period the soil pH was 6.24 on the control treatment, 6.49 on the treatment with a 5 % supplement of the deposit and 6.86 on the treatment containing 10 % of the deposit. Bottom deposit supplement to light soil significantly diminished the content of zinc, lead and manganese available forms extracted with 1 mol HCl dm–3 and bioavailable forms of cadmium, manganese and iron extracted with 0.01 mol CaCl2 dm–3. No apparent influence of the soil pH on diminishing the availability of a majority of analyzed elements was found, which has been confirmed by negative and insignificant values of correlation coefficients between pH value and element content in soil.
    Celem badań była ocena wpływu dodatku osadu dennego na zawartość i mobilnooeci wybranych pierwiastków śladowych w glebie lekkiej. W badaniach wykazano dodatni wpływ osadu dennego na zwiększenie wartości pH gleby lekkiej. Po 2-letnim okresie badań wartość pH gleby wyniosła: 6,24 w obiekcie kontrolnym, 6,49 w obiekcie z 5 % dodatkiem osadu i 6,86 w obiekcie z 10 % dodatkiem osadu dennego. Dodatek osadu dennego do gleby lekkiej zmniejszył znacznie zawartość form przyswajalnych cynku, ołowiu, i manganu ekstrahowanych 1 mol HCl dm–3 oraz biodostępnych kadmu, ołowiu, manganu i żelaza ekstrahowanych 0,01 mol CaCl2 dm–3. W badaniach nie stwierdzono istotnego wpływu odczynu gleby na zmniejszenie dostępności większości badanych pierwiastków, potwierdzeniem tego są ujemne i statystycznie nieistotne wartoości współczynników korelacji pomiędzy wartooecią pH a zawartością pierwiastków w glebie.
    Źródło:
    Ecological Chemistry and Engineering. A; 2010, 17, 12; 1553-1561
    1898-6188
    2084-4530
    Pojawia się w:
    Ecological Chemistry and Engineering. A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Formy miedzi w glebach lekkich Roztoczanskiego Parku Narodowego [RPN]
    Autorzy:
    Martyn, W
    Skawrylo-Bednarz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/799808.pdf
    Data publikacji:
    2005
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    zawartosc miedzi
    Roztoczanski Park Narodowy
    miedz rozpuszczalna w H2O
    gleby
    miedz calkowita
    gleby lekkie
    miedz rozpuszczalna w HCl
    formy miedzi
    miedz
    Opis:
    W pracy określono zawartości Cu ogólnej oraz rozpuszczalnej w HCl i H₂O w glebach Roztoczańskiego Parku Narodowego (RPN). Badania przeprowadzono na glebach leśnych i ornych. Gleby zaliczone zostały do typu gleb rdzawych. Były to utwory o składzie piasków luźnych i słabogliniastych. Przeprowadzone badania wykazały, że Cu ogólna kumulowała się w poziomach Ap badanych gleb w stosunku do poziomu C, w ilościach odpowiadających glebom niezanieczyszczonym. Ilość miedzi była nieznacznie wyższa w glebach leśnych niż w glebach ornych RPN. W glebach leśnych zaznaczyła się również tendencja wyższej zawartości miedzi rozpuszczalnej w kwasie solnym oraz w H₂O w porównaniu do gleb ornych. Badane gleby niezależnie od kierunku użytkowania cechowały się wysokimi wskaźnikami ruchliwości miedzi rozpuszczalnej w kwasie solnym.
    The study determined the contents of total, acid soluble and water soluble of Cu in the soils of Roztocze National Park (RPN). The study was carried out on both, forest soils and arable soils. The soils were classified as rusty soils formed of loose sands and slightly loamy sands. The study showed that the total Cu was cumulated in Ap horizons of the soils, as compared to C horizons, in amo unts characteristic for unpolluted soils. Cu content was slightly higher in forest soils than in arable soils of RPN. Higher amounts of soluble in hydrochloric acid and water soluble of Cu were observed in forest soils of RPN than in arable soils. Both types of soil were characterized by high mobility indices of Cu soluble in hydrochloric acid.
    Źródło:
    Zeszyty Problemowe Postępów Nauk Rolniczych; 2005, 505; 235-242
    0084-5477
    Pojawia się w:
    Zeszyty Problemowe Postępów Nauk Rolniczych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effectiveness of modified sodium bicarbonate in the purification of exhaust gases from HCl and HF
    Autorzy:
    Wysocki, D.
    Szymanek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2201060.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    sodium bicarbonate
    removal of HCl
    removal of HF
    mechanical activation
    thermal activation
    dry sorbent injection
    wodorowęglan sodu
    aktywacja mechaniczna
    aktywacja termiczna
    wtrysk suchych sorbentów
    DSI
    Opis:
    Purpose The effectiveness of gas purification depends on the sorption properties of sorbents. The aim of the research was to determine the ability of sodium sorbents to remove gaseous pollutants such as HCl and HF. Design/methodology/approach The research used baking soda subjected to mechanical and thermal activation, which was introduced into the hot flue gas circuit, similar to the dry flue gas cleaning method used in all kinds of boilers. Findings In almost all cases, mechanical and thermal treatment of baking soda allowed for a significant improvement in the reduction of hydrogen chloride and hydrogen fluoride concentrations in the exhaust gases produced during the combustion of polyethylene terephthalate (PET) bottles. Research limitations/implications The preparation of sorbents must consider the optimum development of the material's specific surface area, especially during thermal activation, to prevent pores from sintering. Practical implications In wet and dry flue gas cleaning processes, sodium compounds are used in the power industry. Appropriate preparation of the sorbent allows for improving the effectiveness of reducing the concentration of harmful substances and reducing investment and operating costs. Originality/value From the point of view of process optimisation, the results obtained will contribute to the identification of optimal operating conditions in dry sorbent injection systems to prevent the pores on the surface of the sorbent from clogging when injected into hot flue gases.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2022, 114, 2; 57--66
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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