Temat: Fe - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Metal Pillared Bentonite Synthesis and Its Characteristics Using X-Ray Diffraction
Autorzy:: Sisnayati
Said, Muhammad
Aprianti, Nabila
Komala, Ria
Dwipayana, Hendra
Faizal, Muhammad
Powiązania:: https://bibliotekanauki.pl/articles/2202294.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: crystal structure
natural bentonite
pillared bentonite
Al/Fe
Opis:: Modification of bentonite by the Al/Fe metal oxide pillarization process was carried out with metal oxides. The bentonite pillars were successfully characterized using an X-Ray Diffraction (XRD) spectrophotometer. The results of XRD characterization showed the peak diffraction angle (2θ) in metal-pillared bentonite was 26.84° at 698.98 cps. Meanwhile, in thermally and chemically activated bentonite, the peak angles were marked at 20.64° and 26.7°. There is a shift in the peak angle after activation and pillarization. XRD patterns showed dioctahedral smectite and quartz accessory minerals.
Źródło:: Journal of Ecological Engineering; 2022, 23, 12; 68--74
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Bioremediation of Iron on Diamond Post Mining Soil Using Compost Made from Cow Manure and Traditional Market Organic Waste
Autorzy:: Mahyudin, Rizqi Puteri
Firmansyah, Muhammad
Purwanti, Melisa Anggraini
Najmina, Dina
Powiązania:: https://bibliotekanauki.pl/articles/124071.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: bioremediation
composting
cow manure
Fe
market organic waste
Opis:: The purpose of this research was to improve the diamond post-mining soil quality using a bioremediation composting method based on the cow manure and organic waste from a traditional market. This research was conducted for: 1) identifying the conditions for temperature, pH and moisture during the composting process; 2) analyzing the difference of variations in composition and the best composting durations. The bioremediation method used is open windrow composting, divided into four composition variations, namely variation A (100% soil); B (75% soil: 25% compost); C (50% soil: 50% compost); D (25% soil: 75% compost). The variations of composting duration are 15^th and 30^th days. From the result of two-way ANOVA test, it can be concluded that there is no significant difference in the decrease of Fe value due to the variations in composition ratio and duration of composting.
Źródło:: Journal of Ecological Engineering; 2020, 21, 5; 221-228
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Bioaccumulation of Chromium, Iron, and the Expression of TNF-α and Caspase-3 in Mudskipper (Periophthalmus spp.) from Ambon Island Waters, Indonesia
Autorzy:: Liline, Sintje
Rumahlatu, Dominggus
Salmanu, Sriyanti I. A.
Pattipeilohy, Mery
Sangur, Kristin
Powiązania:: https://bibliotekanauki.pl/articles/2173288.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: heavy metals
Cr
Fe
TNF-α
caspase-3
mudskipper
Opis:: TNF-α protein and caspase-3 in mudskipper muscle can be used as a biomarker to evaluate the environmental conditions. Therefore, this study aimed to analyze the heavy metal contents, specifically Cr and Fe, in the sediments from the mangrove area, as well as the expression of TNF-α and caspase-3 in mudskipper muscle. The samples used were the sediments and mudskippers from the waters of Poka, Waai, and Rutong Villages. The heavy metals were analyzed using Atomic Absorption Spectrophotometry (AAS), while the TNF-α and caspase-3 expressions were assessed with immunohistochemical staining. Observations were carried out using an optical microscope with 1000x magnification. The results showed that the proportion of Fe accumulated in mudskipper at the three locations was greater than Cr, while Cr was higher in the sediment compared to Fe. Moreover, the TNF-α and caspase-3 expressions appeared in muscle organs in varying amounts. This indicates that Cr and Fe under excessive conditions can be toxic to mudskipper causing muscle inflammation and cell death, which leads to the expression of TNF-α and caspase-3.
Źródło:: Journal of Ecological Engineering; 2022, 23, 7; 90--104
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Synthesis and Characterization of ZnO/MnFe2O4 Nanocomposites for Degrading Cationic Dyes
Autorzy:: Yuniar
Agustina, Tuty Emilia
Faizal, Muhammad
Hariani, Poedji Loekitowati
Powiązania:: https://bibliotekanauki.pl/articles/24201760.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: nanocomposite
ZnO/Fe2O4
cationic dyestuff
photocatalysis
Opis:: By breaking down harmful dye waste into harmless components under the right irradiation sources, photocatalysis is an unorthodox but promising technique that can reduce industrial wastewater pollution, particularly in the textile industry. Synthetic textile dyes called cationic dyes must be handled carefully because they are poisonous and challenging to breakdown. Photocatalytic oxidation is a useful technique for eliminating hazardous organic pigments. This investigation aims to synthesize and characterize ZnO/MnFe2O4 nanocomposites as well as investigate the effects of varying ZnO:MnFe2O4 ratios, pH levels, doses, and irradiation times on band gap reduction and photocatalytic applications tested with cationic dyes, specifically methylene blue, under the illumination of sunlight. the co-precipitation approach for the manufacture of nanocomposites with different mole ratios of ZnO:MnFe2O4 (1:0.1; 2:0.1; 3:0.1). The component comprising the nanocomposite is ZnO/MnFe2O4, according to the results of the characterisation using XRD, SEM-EDX, FTIR, and BET. UV-DRS measurements of the band gap revealed that as ZnO was reduced, the band gap of the nanocomposite likewise decreased, from 3.35 eV to 2.78 eV. The greatest degradation of 93.2% was achieved for the degradation of 50 mg/L methylene blue (MB) dye with a catalyst dosage of 20 mg at a ratio of 1:0.2 for 50 minutes of irradiation. Since the point of zero charges (pzc) was reached at a pH of 7.8, a photodegradation adsorption-friendly solution pH of 8 was created.
Źródło:: Journal of Ecological Engineering; 2023, 24, 4; 252--263
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Biosynthetic of Titanium Dioxide Nanoparticles Using Zizyphus Spina-Christi Leaves Extract: Properties
Autorzy:: Alobaidi, Tuqa B.
Alwared, Abeer I.
Powiązania:: https://bibliotekanauki.pl/articles/2025518.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: green synthesis
TiO2
Zizyphus Spina-Christi
band gap
XRD
FE-SEM
Opis:: The present project utilizes a straightforward, inexpensive, and environmentally friendly approach to produce Titanium dioxide nanoparticles utilizing Zizyphus Spina-Christi leaves (Z-TiO2). Ultra-Spectrophotometry (UV-Vis) was used to characterize the synthesized nanoparticles, which showed the production of nanoparticles at 320 nm absorbance. To investigate functional groups, Fourier Transform Infrared Spectroscopy (FTIR) has been used. The presence of Titanium Dioxide was verified using Energy Distribution X-ray Spectroscopy (EDS). Surface area is calculated using the Brunauer Emmett Teller (BET) formula. Images from Field Emission Electron Microscopy (FE-SEM) verified the nanoparticles' spherical shape and relatively homogenous size distribution. These findings demonstrated that the production of Z-TiO2 nanoparticles was successful.
Źródło:: Journal of Ecological Engineering; 2022, 23, 1; 315-324
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Effect of Magnetite Oxide Nanoparticles and Tungsten Oxide Nanoparticles on Phosphate Removal from Aqueous Solutions
Autorzy:: EL-Baz, Amro
Mokhtar, Mona
Abdo, Ahmed
Powiązania:: https://bibliotekanauki.pl/articles/24201790.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: phosphate removal
nanoparticles
Fe3O4 NPs
WO3 NPs
adsorption
desorption
Opis:: Phosphate (P) removal from aqueous solutions were studied by a new mineral adsorbent, tungsten (VI) oxide (WO3) nanoparticles (NPs), which has not been the subject of much research in the field of removing P contaminants from agricultural wastewater. In this paper, P was removed from aqueous solutions by a new mineral adsorbent, WO3 NPs and it was compared with magnetite (iron IV) oxide (Fe3O4) nanoparticles (NPs) under the same ambient operating conditions i.e., The influence of the dosage of adsorbents, initial P concentration, contact time, pH and temperature. The values that achieved the best removal were recorded. It was concluded that the best limits for pH were at 2–3, contact time at 40 minutes, temperature at 45 °C and adsorbent dose at 1.0 g/L. Best results of the variables were applied on samples of real agricultural wastewater, which achieved removal ratio of 77.3% and 75.42% for Fe3O4 and WO3 NPs, respectively. SEM, EDX and FTIR images and analyses were conducted to describe the characteristics of nano-adsorbents used before and after P adsorption in aqueous solutions. The P adsorption kinetics for aqueous solutions were examined by fitting results of the experiment to both the first & second pseudo-kinetically models. The outcome indicated that kinematic data fit better with pseudo-second-order kinetic models. Moreover, the information captured from equilibrium adsorption was analyzed using isothermal methods (by Langmuir & Freundlich Forms). Their results showed that the Freundlich form is considered more suitable than Langmuir form in analyzing the biosorption of P ions. The thermodynamic demeanor of P adsorption by Fe3O4 and WO3 NPs was analyzed and evaluated, and the thermodynamic data analyses confirmed the process of P adsorption was spontaneous. The ΔG° value was negative, while ΔH° and ΔS° values found to be positive, which means that the adsorption of P was a spontaneous, random and endothermic operation. In general, Fe3O4 and WO3 nanoparticles had a high efficiency in removing phosphate from water. In addition, WO3 NPs has been identified as one of the most promising adsorbents due to its rapid and effective adsorption of pollutants.
Źródło:: Journal of Ecological Engineering; 2023, 24, 3; 287--303
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Modification of Calcium Oxide from Green Mussel Shell with Iron Oxide as a Potential Adsorbent for the Removal of Iron and Manganese Ions from Acid Mine Drainage
Autorzy:: Purwaningrum, Widia
Hasanudin, Hasanudin
Rachmat, Addy
Riyanti, Fahma
Hariani, Poedji Loekitowati
Powiązania:: https://bibliotekanauki.pl/articles/2202252.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: CaO/Fe3O4
green mussel shell
adsorption
iron
manganese
acid mine drainage
Opis:: Acid mine drainage (AMD) has the characteristics of high heavy metal ion content and low pH. This study aimed to synthesize the CaO/Fe3O4 composite for the adsorption of iron and manganese ions from acid mine drainage. CaO was synthesized from the shells of green mussels (Perna viridis). The CaO/ Fe3O4 composites were characterized using XRD, BET surface area, SEM-EDS, and VSM. The functional groups of the composite before and after adsorption were analyzed using FTIR. The adsorption of Fe(II), Fe(III), and Mn(II) ions was carried out with the batch method to determine the effect of pH, contact time, and initial concentration of metal ions. The CaO/ Fe3O4 composite has magnetic properties, as indicated by the saturation magnetization value of 65.49 emu/g. The Langmuir and Freundlich isotherm models were used to describe the adsorption isotherm of the composite for Fe(II), Fe(III), and Mn(II) ions. Investigations were also conducted on adsorption kinetics, including pseudo-first-order and pseudo-second-order, as well as adsorption thermodynamics comprising free energy, enthalpy, and entropy. Pseudo-first-order and Langmuir isotherms are suitable to describe the adsorption of Fe(II), Fe(III), and Mn(II) ions with adsorption capacities of Fe(III) > Fe(II) > Mn(II). Moreover, the adsorption of all ions using the composite occurred spontaneously. The removal effectiveness for Fe and Mn ions from AMD using CaO/ Fe3O4 composite, reached 90.41 and 97.59%, respectively, in volume 100 mL AMD, composite mass 0.4 g, and a contact time of 60 minutes.
Źródło:: Journal of Ecological Engineering; 2022, 23, 11; 188--201
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Effect of fly ashes and sewage sludge on Fe, Mn, Al, Si and Co uptake by grass mixture
Autorzy:: Antonkiewicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/125129.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: fly ashes
municipal sewage sludge
grass mixture
yield
Fe
Mn
Al
Si
Co
uptake
quantitative ratios
Opis:: Application of sewage sludge for environmental management of fly ashes landfill site affects chemical composition of plants. The aim of the present investigations was learning the effect of growing doses of municipal sewage sludge on the yield and uptake of Fe, Mn, Al, Si and Co by grass mixture used for environmental management of fly ashes landfill. The experimental design comprised of 5 objects differing by a dose of municipal sewage sludge supplied per 1 hectare: I. control, II. 25 t d.m., III. 50 t d.m., IV. 75 t d.m. and V. 100 t d.m. Application of sewage sludge resulted in the increase in yield. The content of analyzed elements in the grass mixture depended significantly on sewage sludge dose. Increasing doses of sewage sludge caused marked increase in Mn and Co contents, while they decreased Fe, Al and Si contents in the grass mixture. It was found that growing doses of sewage sludge caused an improvement of Fe to Mn ratio value in the grass mixture. Assessing the element content in the grass mixture in the view of forage value, it was found that Fe and Mn content did not meet the optimal value. Si content in plants was below the optimal value.
Źródło:: Journal of Ecological Engineering; 2014, 15, 3; 6-13
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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