Porous Hydrogels Embedded with Hydrated Ferric Oxide Nanoparticles for Arsenate Removal

2019 ◽  
Vol 1 (5) ◽  
pp. 1006-1014 ◽  
Author(s):  
Ryan Zowada ◽  
Reza Foudazi
Keyword(s):  
Ferric Oxide ◽  
Oxide Nanoparticles ◽  
Hydrated Ferric Oxide

scholarly journals Phosphate removal from aqueous solutions using a hybrid fibrous exchanger containing hydrated ferric oxide nanoparticles

2016 ◽  
Vol 4 (1) ◽  
pp. 388-397 ◽  
Author(s):  
Xialei You ◽  
Adriana Farran ◽  
Diana Guaya ◽  
César Valderrama ◽  
Vladimir Soldatov ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Ferric Oxide ◽  
Phosphate Removal ◽  
Oxide Nanoparticles ◽  
Hydrated Ferric Oxide

Removal and recovery of phosphate from municipal wastewaters using a polymeric anion exchanger bound with hydrated ferric oxide nanoparticles

2009 ◽  
Vol 60 (10) ◽  
pp. 2637-2645 ◽  
Author(s):  
B. D. Martin ◽  
S. A. Parsons ◽  
B. Jefferson
Keyword(s):  
Ion Exchange ◽  
Ferric Oxide ◽  
Anion Exchanger ◽  
Chemical Precipitation ◽  
Oxide Nanoparticles ◽  
Trickling Filter ◽  
Hydrated Ferric Oxide ◽  
The Media ◽  
Polymeric Anion ◽  
Removal And Recovery

A new type of ion exchange media which is highly selective for phosphate, and can be easily regenerated has been investigated. The media consists of hydrated ferric oxide nanoparticles dispersed within the pore structures of polymeric anion exchanger beads. The media combines the durability and mechanical strength of ion exchange resins with the high sorption capacity of ferric oxide for phosphate. The media was trialled in fixed bed mini column experiments with real final effluent from two UK sewage treatment works, one with treatment based on chemical precipitation with iron chloride salts into an activated sludge process (population >250,000), and one based on trickling filter treatment with no specific phosphorus removal process (population <10,000). Results show that the media has high capacity for removing phosphate, reaching capacity at 4000 and 1300 bed volumes for the chemical precipitation and trickling filter works respectively, with performance greatly exceeding that of a standard anion exchanger, Amberlite IRA-410. Also trialled was the media's ability to elute the phosphorus after breakthrough, with the aim of recovering and processing it into a useful product. A one step regenerative process using a single solution containing 4% NaOH and 2% NaCl was passed through the resin bed and the phosphorus concentration of each bed volume leaving the column analysed. 80% of the phosphorus was eluted in the first bed volume. Subsequent tests investigated the performance of the media after successive partial regenerations of one bed volume of the NaOH/NaCl solution. There was no loss of performance observed after ten regeneration cycles, and levels of eluted phosphate were consistently high. These results suggest that the media has high potential for the removal and recovery of phosphate from wastewater streams. Additionally, the small volume of regenerant required translates to a very small operational footprint.

Differential Pulse Voltammetric Determination of Piroxicam on Lanthanide Ferric Oxide Nanoparticles-Carbon Paste Modified Electrode

2018 ◽  
Vol 14 (3) ◽  
pp. 271-276 ◽  
Author(s):  
Isaac Yves Lopes de Macedo ◽  
Morgana Fernandes Alecrim ◽  
Luane Ferreira Garcia ◽  
Aparecido Ribeiro de Souza ◽  
Wallans Torres Pio dos Santos ◽  
...  
Keyword(s):  
Modified Electrode ◽  
Ferric Oxide ◽  
Differential Pulse ◽  
Voltammetric Determination ◽  
Oxide Nanoparticles ◽  
Carbon Paste ◽  
Carbon Paste Modified Electrode

BIOCOMPATIBILITY STUDY OF α-Fe2O3 NANOPARTICLES PREPARED BY HYDROTHERMAL METHOD

2019 ◽  
Vol 26 (09) ◽  
pp. 1950058
Author(s):  
SADEQ H. LAFTA ◽  
ALI ABDULRAHMAN TAHA ◽  
MUHAMMAD M. FARHAN ◽  
SHAIMA Y. ABDULFATTAH
Keyword(s):  
Tumor Cell ◽  
Cell Line ◽  
Hydrothermal Method ◽  
Ferric Oxide ◽  
Tumor Cell Line ◽  
Oxide Nanoparticles ◽  
Average Particle ◽  
Normal Cells ◽  
Prepared Nanoparticles ◽  
Biocompatibility Study

Nanoparticles of alpha ferric oxide ([Formula: see text]-Fe2O3) were prepared by the hydrothermal method. Structural properties of [Formula: see text]-Fe2O3 were determined by XRD, SEM and AFM measurements. The particles had a good matching with standard pattern. Average particle size was about 90[Formula: see text]nm and the distribution extended from about 20[Formula: see text]nm to 120[Formula: see text]nm. Biocompatibility study of ferric oxide nanoparticles against bacteria, parasites, tumor cell line and normal cells was determined. No antibacterial activity was observed for the concentration, of ferric oxide nanoparticles in distilled water, up to 1.5[Formula: see text]mg/ml vs. E. coli and S. aureus. Moreover, MTT assay was used to determine the cytotoxicity against parasites and cells. Intermediate cytotoxicity (53.30%) of 1.5[Formula: see text]mg/ml of prepared nanoparticles was noted against L. tropica, while weak cytotoxicity of 5.20% was observed against L. donovani at the same concentration of ferric oxide nanoparticles. On the other hand, the prepared nanoparticles revealed low cytotoxicity (47.28%) against SR tumor cell line, while no cytotoxicity was shown against lymphocytes, as a model of normal cells.

scholarly journals The Effects of Magnetic Nanoparticles Incorporated in Polyelectrolyte Capsules

2017 ◽  
Vol 54 (4) ◽  
pp. 630-634
Author(s):  
Carmen Stavarache ◽  
Mircea Vinatoru ◽  
Timothy Mason ◽  
Larysa Paniwnyk
Keyword(s):  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Calcium Carbonate ◽  
Ferric Oxide ◽  
Iron Content ◽  
Single Layer ◽  
Oxide Nanoparticles ◽  
Polyelectrolyte Multilayer ◽  
The Core ◽  
Calcium Carbonate Template

Polyelectrolyte multilayer capsules are synthesized comprising of 12 total layers each containing a single layer of iron oxide nanoparticles in shells 4, 6, 8 or 10. A protein-labelled dye is embedded in the calcium carbonate template core as a model for the encapsulation of a drug. The core is dissolved after 6 layers are formed. Two types of magnetic nanoparticles are incorporated into various capsule shells: ferric oxide (Fe2O3, 50 nm) and iron oxide (Fe3O4, 15 nm), a 1:1 (vol.) mixture of the two types of nanoparticles suspensions is also used. Nanoparticle inclusion reduces the capsule sizes in all cases with the order of effect Fe3O4 [ Fe2O3 [ Fe2O3/Fe3O4 mixture. When Fe3O4 or a Fe2O3/Fe3O4 mixture is incorporated in layer 6 the reduction in size of the final capsules is less than expected. The number of surviving capsules containing nanoparticles are lower than control regardless of which of the nanoparticles is used but here the effect of Fe3O4 or a mixture of the two types of nanoparticles incorporated in layer 6 was slightly out of step. The amount of iron incorporated is almost the same regardless of which shell the nanoparticles were incorporated but the iron content using 50 nm nanoparticles is generally slightly higher than that obtained with 15 nm nanoparticles.

Arsenate Removal from Aqueous Media by Nanosized Hydrated Ferric Oxide (HFO)-Loaded Polymeric Sorbents: Effect of HFO Loadings

2008 ◽  
Vol 47 (11) ◽  
pp. 3957-3962 ◽  
Author(s):  
Qingjian Zhang ◽  
Bingcai Pan ◽  
Weiming Zhang ◽  
Bingjun Pan ◽  
Quanxing Zhang ◽  
...  
Keyword(s):  
Ferric Oxide ◽  
Aqueous Media ◽  
Polymeric Sorbents ◽  
Hydrated Ferric Oxide
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