Iron Oxide Nanoenzymes for the Treatment of Polluted Water

2021 ◽  
pp. 57-75
Author(s):  
N. Pariona ◽  
F. Mondaca ◽  
A. I. Mtz-Enriquez
Keyword(s):  
Iron Oxide ◽  
Polluted Water

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.

Preparation of an Iron Oxide Modified Montmorillonite for Removal of Arsenic in Waters

2010 ◽  
Vol 156-157 ◽  
pp. 849-853 ◽  
Author(s):  
Hai Fei Liu ◽  
De Ren Miao ◽  
Fei Liu
Keyword(s):  
Iron Oxide ◽  
Arsenic Removal ◽  
Polluted Water ◽  
X Ray Diffraction ◽  
Characteristic Analysis ◽  
Experimental Conditions ◽  
Thermal Gravimetry ◽  
Modified Montmorillonite ◽  
Removal Of Arsenic ◽  
Better Than

Most concerns have focused on the arsenic (As) contamination in wastewater. Montmorillonite (MMT) has been proved to be a good adsorbent for removal heavy metals existing as cation in ground water while it is invalid for anions. However, arsenic usually exists as anions in aqueous. Accordingly, suitable modifications on MMT need to be done before using. This paper presents the results that a kind of commercial MMT has been modified by iron oxides under normal and inverse titration conditions. The x-ray diffraction (XRD), Thermal Gravimetry Analysis and Differential Thermal Analysis (TGA-DTA) and SBET analysis have been employed to elucidate the modification mechanisms. Modification characteristic analysis illustrated that the iron oxide associated with MMT by coated style as polymerization of hydroxyl-Fe (Fe (OH) 3) under inverse titration condition. Under normal titration condition, on the other hand, the iron oxide associated with MMT predominant by intercalation as goethite (FeOOH). The arsenic removal efficiencies of different modified products for polluted water have also been verified by batch experiments. Results proved that Iron oxide modified MMT on the removal efficiency of arsenic significantly increased and the normal titration is better than inverse titration as indicated by the arsenic removal ratios under the same experimental conditions. Based on these results, the iron oxide modified MMT by normal titration procedure is a promising material for removal arsenic in wastewaters.

Research on Producing New Ceramic Filter Media Modified at Surface and its Application in Pre-Treating Slightly-Polluted Water

2011 ◽  
Vol 105-107 ◽  
pp. 1736-1741
Author(s):  
Yan Qing Zhang ◽  
Meng Li
Keyword(s):  
Iron Oxide ◽  
Oxide Film ◽  
Fine Particles ◽  
Ph Value ◽  
Removal Rate ◽  
Ceramic Filter ◽  
Polluted Water ◽  
Organic Substances ◽  
Filter Media ◽  
Quality Of Water

Using Fe (NO3)3 as modifying agent, a new porous environmental ceramic filter is modified at surface to pre-treat slightly-polluted water. It can effectively reduce organic substances in subsequent processes, thus enhance the quality of water output. The iron oxide / modified ceramic filter media was manufactured by heating vaporization, and the optimal modification conditions were as follows: pH value is seven, Fe (NO3)3 density is 2mol/L, and roasting temperature is 550 centigrade. Compared with plain ceramic filter media, the removal rate of COD was enhanced six to eight times. The surface morphology of filter media was inspected by SEM, which showed that the iron oxide film, being fine particles, was attached to the ceramic filter. This is beneficial for enhancing adsorption capability. The matter species of iron oxide film were analyzed by XRD, result showed that it contains α-Fe2O3 and α-FeOOH, which is helpful for adsorbing and removing organic substances in water.

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.

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.

Ultrafast Cr(vi) removal from polluted water by microwave synthesized iron oxide submicron wires

2014 ◽  
Vol 50 (59) ◽  
pp. 8036 ◽  
Author(s):  
Zhen Liu ◽  
Long Chen ◽  
Lin Zhang ◽  
Selcuk Poyraz ◽  
Zhanhu Guo ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Polluted Water

scholarly journals Removal of Cd(ll) from polluted water by filtration using iron oxide coated sand media

2020 ◽  
Vol 870 ◽  
pp. 012077
Author(s):  
Hyman Jafar Meerza Al Jaaf ◽  
Mohammed Ibrahem Basheer Al-Ubaidy ◽  
Zainab T. Al-Sharify
Keyword(s):  
Iron Oxide ◽  
Polluted Water ◽  
Coated Sand

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.

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