scholarly journals Efficiency in Ofloxacin Antibiotic Water Remediation by Magnetic Zeolites Formed Combining Pure Sources and Wastes

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2137
Author(s):  
Claudia Belviso ◽  
Giulia Guerra ◽  
Maryam Abdolrahimi ◽  
Davide Peddis ◽  
Federica Maraschi ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Red Mud ◽  
Tap Water ◽  
Water Remediation ◽  
Polluted Water ◽  
Oxide Nanoparticles ◽  
Zeolite A ◽  
Adsorption Affinity ◽  
Silica Alumina

In this work, red mud (RM) and spinel iron oxide nanoparticles (SPIONs) were added to pure silica/alumina sources (SAs) and fly ash (FA) with the aim of synthesizing and investigating the magnetic behavior of different zeolites. SAs were used to synthesize zeolite with LTA topology (zeolite A) with the addition of both red mud and spinel iron oxide nanoparticles. FA and RM were mixed to synthesize sodalite whereas only FA with the addition of SPIONs was used to form zeolite with FAU-topology (zeolite X). All the synthetic products showed magnetic properties. However, zeolites with spinel iron oxide nanoparticles (zeolites A and X) showed ferromagnetic-like behavior. Sodalite was characterized by a reduction in saturation magnetization, whereas zeolite A with red mud displayed antiferromagnetic behavior. For the first time, all the synthetic products were tested for polluted water remediation by a persistent emerging contaminant, ofloxacin (OFL) antibiotic. The four zeolite types showed good adsorption affinity towards OFL under actual conditions (tap water, natural pH). All materials were also tested for OFL removal in real waters spiked with OFL 10 µg L−1. Satisfactory recoveries (90–92% in tap water, 83–87% in river water) were obtained for the two zeolites synthesized from industrial waste materials.

Preparation and application of magnetite nanoparticles immobilized on cellulose acetate nanofibers for lead removal from polluted water

2016 ◽  
Vol 17 (1) ◽  
pp. 176-187 ◽  
Author(s):  
Thanaa I. Shalaby ◽  
Marwa F. El-Kady ◽  
Abd El Halem M. Zaki ◽  
Soheir M. El-Kholy
Keyword(s):  
Iron Oxide ◽  
Cellulose Acetate ◽  
Iron Oxide Nanoparticles ◽  
Composite Nanofibers ◽  
Polluted Water ◽  
Oxide Nanoparticles ◽  
Lead Removal ◽  
Order Model ◽  
Solution Ph ◽  
Ft Ir

Novel magnetic cellulose acetate (CA) nanofibers were fabricated using an electrospinning process. Co-precipitated magnetite iron oxide nanoparticles were immobilized onto CA nanofibers at different weight ratios (0.2–2.5% wt/v) with a CA concentration of 15% (wt %), applied electric voltage of 20 kV, feeding rate of 1.5 ml/h and 7 cm distance between needle tip and collector. The prepared iron oxide nanoparticles were characterized using X-ray diffraction, a transmission electron microscope, a Fourier transform infrared spectrophotometer (FT-IR) and a vibrating sample magnetometer (VSM). The magnetic nanofibers were characterized by scanning electron microscopy, FT-IR, thermogravimetric analysis and VSM. The fabricated composite nanofibers were evaluated as a sorbent matrix for lead decontamination from aqueous solution using a batch technique. The influence of solution pH, contact time and adsorbent concentration on the removal efficiency was investigated. Adsorption kinetics models and isotherms were applied to the lead decontamination process onto the fabricated composite nanofibers. The kinetics of the sorption process revealed that the pseudo-second-order model fitted relatively better than the pseudo-first-order model. On the other hand, both the Langmuir and Freundlich isotherms gave a comparable fit to the adsorption data, with a high coefficient of regression of 0.999.

scholarly journals Hybrid Beads of Zero Valent Iron Oxide Nanoparticles and Chitosan for Removal of Arsenic in Contaminated Water

Water ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 2876
Author(s):  
Mian Fawaz Ahmed ◽  
Muhammad Asad Abbas ◽  
Azhar Mahmood ◽  
Nasir M. Ahmad ◽  
Hifza Rasheed ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Ph Value ◽  
Zero Valent Iron ◽  
Polluted Water ◽  
Oxide Nanoparticles ◽  
Contaminated Water ◽  
Contact Period ◽  
Removal Of Arsenic ◽  
Optimized Conditions

Water contaminated with highly hazardous metals including arsenic (As) is one of the major challenges faced by mankind in the present day. To address this pressing issue, hybrid beads were synthesized with various concentrations of zero valent iron oxide nanoparticles, i.e., 20% (FeCh-20), 40% (FeCh-40) and 60% (FeCh-60) impregnated into a polymer of chitosan. These hybrid beads were employed as an adsorbent under the optimized conditions of pH and time to facilitate the efficient removal of hazardous arsenic by adsorption cum reduction processes. X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Brunauer- Emmett-Teller BET, a porosity test and wettability analysis were performed to characterize these hybrid beads. The porosity and contact angle of the prepared hybrid beads decreased with an increase in nanoparticle concentration. The effects of various adsorption factors such as adsorbent composition, contact period, pH value and the initial adsorbate concentration were also evaluated to study the performance of these beads for arsenic treatment in contaminated water. FeCh-20, FeCh-40 and FeCh-60 have demonstrated 63%, 81% and 70% removal of arsenic at optimized conditions of pH 7.4 in 10 h, respectively. Higher adsorption of arsenic by FeCh-40 is attributed to its optimal porosity, hydrophilicity and the presence of appropriate nanoparticle contents. The Langmuir adsorption kinetics described the pseudo second order. Thus, the novel beads of FeCh-40 developed in this work are a potent candidate for the treatment of polluted water contaminated with highly toxic arsenic metals.

Removal of Aluminum from Water and Wastewater Using Magnetic Iron Oxide Nanoparticles

2013 ◽  
Vol 829 ◽  
pp. 752-756 ◽  
Author(s):  
Razieh Asrarian ◽  
Reza Jadidian ◽  
Hooshang Parham ◽  
Sara Haghtalab
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Ferrous Metal ◽  
Complete Removal ◽  
Polluted Water ◽  
Oxide Nanoparticles ◽  
High Concentration ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Magnetic Iron Oxide ◽  
Aluminum Ions

Aluminum is the most widely used non ferrous metal, but its considered as a highly toxic element in drinking water at high concentration and the trace aluminum content in food must be controlled. This paper shows effective removal of aluminum from water and industrial wastewater by magnetic nanoparticle. The method is fast, simple, cheap, effective and safe for treatment of aluminum polluted waters. Preparation of adsorbent is easy and removal time is short. magnetic iron oxide nanoparticles (MIONPs) can adsorb up to 99.8% of 60 ng ml-1of Al ions from polluted water. The required time for complete removal of aluminum ions was 3 minutes. Variation of pH and high electrolyte concentration (NaCl) of the solution do not have considerable effect on the aluminum removal efficiency.

Removal of Copper from Industrial Water and Wastewater Using Magnetic Iron Oxide Nanoparticles Modified with Benzotriazole

2013 ◽  
Vol 829 ◽  
pp. 742-746 ◽  
Author(s):  
Reza Jadidian ◽  
Hooshang Parham ◽  
Sara Haghtalab ◽  
Razieh Asrarian
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Copper Ions ◽  
Complete Removal ◽  
Considerable Effect ◽  
Polluted Water ◽  
Oxide Nanoparticles ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Magnetic Iron Oxide ◽  
Modified Magnetic Nanoparticles

This paper shows effective removal of copper from water and industrial wastewater by modified magnetic nanoparticle with benzotriazole as an efficient adsorbent. The method is fast, simple, cheap, effective and safe for treatment of copper polluted waters. Non-modified magnetic iron oxide nanoparticles (MIONPs) can adsorb up to 49.6% of 50 ng ml-1 of Cu (ΙΙ) ions from polluted water, but modified magnetic nanoparticles improved the efficiency up to 99.7% for same concentration. The required time for complete removal of copper ions was 5 minutes. Variation of pH and high electrolyte concentration (NaCl) of the solution do not have considerable effect on the copper removal efficiency.

scholarly journals Flavin-Conjugated Iron Oxide Nanoparticles as Enzyme-Inspired Photocatalysts for Azo Dye Degradation

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 324
Author(s):  
Samer I. Nehme ◽  
Leander Crocker ◽  
Ljiljana Fruk
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Azo Dye ◽  
Ethylenediaminetetraacetic Acid ◽  
Dye Degradation ◽  
Water Remediation ◽  
Oxide Nanoparticles ◽  
Photocatalytic System ◽  
Ethanesulfonic Acid ◽  
Water Pollutant

In this work, a new photocatalytic system consisting of iron oxide nanoparticles (IONPs), coated with a catechol-flavin conjugate (DAFL), is synthesized and explored for use in water remediation. In order to test the efficiency of the catalyst, the photodegradation of amaranth (AMT), an azo dye water pollutant, was performed under aerobic and anaerobic conditions, using either ethylenediaminetetraacetic acid (EDTA) or 2-(N-morpholino)ethanesulfonic acid (MES) as electron donors. Depending on the conditions, either dye photoreduction or photooxidation were observed, indicating that flavin-coated iron-oxide nanoparticles can be used as a versatile enzyme-inspired photocatalysts.

TARGETING CYCLIN B1 WITH ANTISENSE OLIGONUCLETOTIDES- COATED SUPERPARAMAGNETIC IRON OXIDE NANOPARTICLES

2018 ◽  
Vol 6 (10) ◽  
Author(s):  
Hosam Zaghloul ◽  
Doaa A. Shahin ◽  
Ibrahim El- Dosoky ◽  
Mahmoud E. El-awady ◽  
Fardous F. El-Senduny ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Cellular Uptake ◽  
Superparamagnetic Iron Oxide ◽  
Cyclin B1 ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Mcf7 Cells ◽  
M Phase ◽  
The Impact

Antisense oligonucleotides (ASO) represent an attractive trend as specific targeting molecules but sustain poor cellular uptake meanwhile superparamagnetic iron oxide nanoparticles (SPIONs) offer stability of ASO and improved cellular uptake. In the present work we aimed to functionalize SPIONs with ASO targeting the mRNA of Cyclin B1 which represents a potential cancer target and to explore its anticancer activity. For that purpose, four different SPIONs-ASO conjugates, S-M (1–4), were designated depending on the sequence of ASO and constructed by crosslinking carboxylated SPIONs to amino labeled ASO. The impact of S-M (1–4) on the level of Cyclin B1, cell cycle, ROS and viability of the cells were assessed by flowcytometry. The results showed that S-M3 and S-M4 reduced the level of Cyclin B1 by 35 and 36%, respectively. As a consequence to downregulation of Cyclin B1, MCF7 cells were shown to be arrested at G2/M phase (60.7%). S-M (1–4) led to the induction of ROS formation in comparison to the untreated control cells. Furthermore, S-M (1–4) resulted in an increase in dead cells compared to the untreated cells and SPIONs-treated cells. In conclusion, targeting Cyclin B1 with ASO-coated SPIONs may represent a specific biocompatible anticancer strategy.

Ferrozine Assay for Simple and Cheap Iron Analysis of Silica-Coated Iron Oxide Nanoparticles

2018 ◽  
Author(s):  
Hattie Ring ◽  
Zhe Gao ◽  
Nathan D. Klein ◽  
Michael Garwood ◽  
John C. Bischof ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Hydrofluoric Acid ◽  
Inductively Coupled Plasma ◽  
Silica Shell ◽  
Oxide Nanoparticles ◽  
Inductively Coupled ◽  
Digestion Process ◽  
Plasma Methods ◽  
Iron Analysis

The Ferrozinen assay is applied as an accurate and rapid method to quantify the iron content of iron oxide nanoparticles (IONPs) and can be used in biological matrices. The addition of ascorbic aqcid accelerates the digestion process and can penetrate an IONP core within a mesoporous and solid silica shell. This new digestion protocol avoids the need for hydrofluoric acid to digest the surrounding silica shell and provides and accessible alternative to inductively coupled plasma methods. With the updated digestion protocol, the quantitative range of the Ferrozine assay is 1 - 14 ppm. <br>

Sign in / Sign up

Export Citation Format

Share Document