scholarly journals Sulfonated Cellulose-Based Magnetic Composite as Useful Media for Water Remediation from Amine Pollutants

2020 ◽  
Vol 10 (22) ◽  
pp. 8155
Author(s):  
Antonio De Nino ◽  
Matteo Antonio Tallarida ◽  
Vincenzo Algieri ◽  
Fabrizio Olivito ◽  
Paola Costanzo ◽  
...  
Keyword(s):  
Environmental Remediation ◽  
Chlorosulfonic Acid ◽  
Water Remediation ◽  
Precipitation Method ◽  
Magnetic Composite ◽  
Flame Ionization Detection ◽  
Acid Base ◽  
Flame Ionization ◽  
Co Precipitation ◽  
Green Polymer

Commercially available microcrystalline cellulose (MCC) was functionalized using chlorosulfonic acid, while iron oxide nanoparticles (IONPs) were adsorbed on the surface of the cellulose derivative by the Massart’s co-precipitation method. The obtained magnetite-decorated sulfate cellulose nanoparticles (MDSCNs) were characterized via Fourier transform infrared (FTIR) spectroscopy, scanning-electron microscopy (SEM), and elemental analysis, while the acidity of the functionalized cellulose was determined using an acid–base titration with phenolphthalein as an indicator. Furthermore, in order to determine the adsorptive power of the obtained composite, a series of analyses were performed on aqueous amine pollutants using flame ionization detection gas chromatography (GC-FID). The results of this study clearly show how a bio-compatible green polymer as cellulose can be easy functionalized in order to improve its chemical and physical properties, obtaining a magnetic composite useful in water purification. Adsorption percentages up to 90% and a very small amount of composite used (100 mg) proved how our material can be a powerful tool in environmental remediation.

Facile synthesis of magnetic La–Zr composite as high effective adsorbent for fluoride removal

RSC Advances ◽  
2016 ◽  
Vol 6 (42) ◽  
pp. 35859-35867 ◽  
Author(s):  
Pinghua Chen ◽  
Weibo Zhang ◽  
Menglin Li ◽  
Peng Ai ◽  
Lei Tian ◽  
...  
Keyword(s):  
Precipitation Method ◽  
Fluoride Removal ◽  
Magnetic Composite ◽  
Facile Synthesis ◽  
Batch Studies ◽  
Co Precipitation

A novel magnetic composite of La–Zr was prepared by co-precipitation method, and its fluoride removal ability was investigated in batch studies.

Green Magnetic Composite Sheet from Durian Shell and Nano-Magnetite Particles

2015 ◽  
Vol 761 ◽  
pp. 515-519 ◽  
Author(s):  
Mohd Khairul Shahril ◽  
Rose Farahiyan Munawar ◽  
Muhd Hafez Mohamed ◽  
Afraha Baiti Arif ◽  
Noraiham Mohamad ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Particles ◽  
Added Value ◽  
Precipitation Method ◽  
Magnetic Composite ◽  
Great Success ◽  
Composite Sheet ◽  
Biomass Waste ◽  
Co Precipitation

Biomass-derived materials such as kenaf pulp and wood chips are a perfect candidate to produce magnetic paper. Furthermore, by using biomass waste, such as paddy straw, sugarcane, bagasse and durian shell, the cost of producing magnetic paper can be further reduced while giving added value to the waste. This paper investigates the potential of producing magnetic sheet from durian shell. Initially, durian shells were dried before undergoing the pulping process. The resulted sheet was then combined with magnetic particles, the nanomagnetite using either lumen loading or in-situ co-precipitation to produce a magnetic composite sheet. After being loaded with magnetic particles, the composite sheets were tested in terms of the homogeneity of the magnetic particles in the samples, degree of loading of the magnetic particles and the magnetic properties of the samples. Results obtained show a great success in producing the magnetic sheet from durian shell waste and nanomagnetite particles. It was also found that the lumen loading method gives better magnetic properties compared to the in-situ co-precipitation method.

scholarly journals Selective nitrate removal from aqueous solutions by a hydrotalcite-like absorbent FeMgMn-LDH

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hongguang Zhou ◽  
Youlin Tan ◽  
Wei Gao ◽  
Yue Zhang ◽  
Yanmei Yang
Keyword(s):  
Aqueous Solutions ◽  
Environmental Remediation ◽  
Removal Rate ◽  
Nitrate Removal ◽  
Precipitation Method ◽  
Adsorption Mechanisms ◽  
Nitrate Ions ◽  
Sieve Effect ◽  
Nitrate Adsorption ◽  
Co Precipitation

Abstract FeMgMn-LDH, a type of potential environmental remediation material, has been synthesized via a co-precipitation method, and its adsorption characteristics for nitrate were investigated in this study. It’s shown that the prepared FeMgMn-LDH is a promising adsorbent for anions removal, which has high buffer capacity (final pH remained between 9 and 10) and high reversibility, and can remove nitrate ions selectively though an anion-sieve effect. The maximum amount of nitrate adsorption is 10.56 N-mg g−1 at 25 ℃. The removal rate of nitrate ions can reach 86.26% with the adsorbent dose of 5 g/L in a real water. The competition order of coexisting anions on nitrate adsorption by FeMgMn-LDH is CO32− > PO43− > SO42−. The negative values of ΔG0 (from − 27.796 to − 26.426 kJ mol−1) and ΔH0 (− 6.678 kJ mol−1) indicate that the nitrate adsorption process on the FeMgMn-LDH is spontaneous and exothermic. The main adsorption mechanisms of nitrate removal from aqueous solutions by FeMgMn-LDH are electrostatic attraction and ion exchange.

PREPARATION OF MAGNETIC COMPOSITE OF NiFe2O4@SiO2 AND THE ASSEMBLY OF THE COLLOID PARTICLES BY MAGNETIC FIELDS

2005 ◽  
Vol 19 (12) ◽  
pp. 2053-2059
Author(s):  
JUN WANG ◽  
YUEJIN ZHU ◽  
QIANWANG CHEN
Keyword(s):  
Magnetic Fields ◽  
Room Temperature ◽  
Magnetic Core ◽  
Precipitation Method ◽  
Magnetic Composite ◽  
Colloid Particles ◽  
Biomedical Systems ◽  
Monodisperse Silica ◽  
Co Precipitation ◽  
Hydrolysis Of

Nearly monodisperse silica spheres with a diameter of ~90 nm containing NiFe 2 O 4 nanoparticles were successfully prepared by hydrolysis of TEOS in the presence of NiFe 2 O 4 nanoparticles, synthesized through a hydrothermal method. The colloid particles were characterized by XRD, TEM and VSM. The results indicate that the particles possess better magnetic properties at room temperature, compared with paramagnetic colloids with magnetic core by co-precipitation method. The colloid particles assembled under additional magnetic fields could have potential application in biomedical systems.

scholarly journals Production and Utilization of Surface Engineered SPIONS for Enhanced Removal of Dye from Water

2020 ◽  
Vol 2 (1) ◽  
pp. 20
Keyword(s):  
Environmental Remediation ◽  
Dye Removal ◽  
Metal Oxide Nanoparticles ◽  
Clinical Applications ◽  
Precipitation Method ◽  
Great Promise ◽  
Oxide Nanoparticles ◽  
Contaminated Water ◽  
Co Precipitation ◽  
Removal Studies

SPIONs, being the only metal oxide nanoparticles clinically approved, have shown a great promise in the various clinical applications, including environmental remediation, specifically water treatment. In this study, SPIONs are produced by the chemical co-precipitation method used for dye removal studies, where isotherm kinetics were studied. In conclusion, it was shown that both naked and coated SPIONs successfully demonstrated the removal of crystal violet from the water, thereby enabling to apply SPIONs for the treatment of contaminated water with textile dyes.

scholarly journals Efficient solar heterogeneous photocatalytic degradation of metronidazole using heterojunction semiconductors hybrid nanocomposite, layered double hydroxides

2020 ◽  
Vol 82 (12) ◽  
pp. 2837-2846
Author(s):  
Farid Aoudjit ◽  
Fouzia Touahra ◽  
Lamine Aoudjit ◽  
Ouiza Cherifi ◽  
Djamilla Halliche
Keyword(s):  
Photocatalytic Degradation ◽  
Layered Double Hydroxides ◽  
Environmental Remediation ◽  
Solar Irradiation ◽  
Precipitation Method ◽  
Catalyst Loading ◽  
X Ray ◽  
Constant Ph ◽  
Co Precipitation ◽  
Double Hydroxides

Abstract This study focuses on the synthesis of various nanocomposites with heterojunction structures, MgAl-LDH (LDH = layered double hydroxides) hybrid with semiconductor such as MoO3 and CuO. These solids were synthesized by co-precipitation method at constant pH and have been characterized extensively using atomic absorption spectroscopy (AAS), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and transmission electron microscopy-energy dispersive X-ray (TEM-EDX) methods. The catalytic activity of nanocomposites was tested in the photocatalytic degradation under solar irradiation of emerging pollutants as the pharmaceutical metronidazole (MNZ). The experimental parameters, including initial MNZ concentration, the nature of oxide incorporate in the photocatalyst, catalyst loading were explored. All the synthesized samples showed high photocatalytic performances; the highest photocatalysis efficiency was achieved with the photocatalyst dose 1.5 g/L and initial MNZ concentration of 10 mg/L at neutral pH. The photocatalytic experimental results were fitted very well to the Langmuir-Hinshelwood model. From the obtained results the calcined LDH/semiconductors could be efficient for the photocatalytic process under solar irradiation of pharmaceuticals and may contribute in environmental remediation.

INFLUENCE OF PARTICLE SIZE ON DENSITY, ULTRASONIC VELOCITY AND VISCOSITY OF MAGNETITE NANOFLUIDS AT DIFFERENT TEMPERATURES

NANO ◽  
2014 ◽  
Vol 09 (08) ◽  
pp. 1450089 ◽  
Author(s):  
AMMAR BIN YOUSAF ◽  
MAJID KHAN ◽  
MUHAMMAD IMRAN ◽  
MUHAMMAD USMAN ◽  
MUHAMMAD ASGHAR JAMAL
Keyword(s):  
Particle Size ◽  
Ultrasonic Velocity ◽  
Precipitation Method ◽  
Physical Parameters ◽  
Practical Application ◽  
Acid Base ◽  
Different Temperatures ◽  
Specific Temperature ◽  
D 20 ◽  
Co Precipitation

The influence of particle size on density, ultrasonic velocity and viscosity of magnetite nanofluids have been determined at (298.15 K, 303.15 K, 308.15 K and 313.15 K). Two different sized nanoparticles (commercially procured D = 20–30 nm and synthesized D = 9 ± 3 nm in the laboratory by co-precipitation method) were dispersed in a citric acid base fluid. The desired parameters have been experimentally determined by loading different concentrations of nanoparticles. It has been found that the influence of particle size and temperature on measured physical parameters (density, ultrasonic velocity and viscosity) is not negligible and can also be taken into account in any practical application. The analyzed physical parameters can describe qualitatively and quantitatively the particle size distribution of nanofluids at a specific temperature. Results are interpreted in terms of particle–particle and particle–fluid interactions.

Investigation of Strain Sensing Properties of Polyester/Magnetite Composite Materials

2013 ◽  
Vol 543 ◽  
pp. 464-467 ◽  
Author(s):  
Sotiria Karagiovanaki ◽  
Loukas Zoumpoulakis
Keyword(s):  
Composite Materials ◽  
Magnetic Flux ◽  
Tensile Stress ◽  
Flux Density ◽  
Precipitation Method ◽  
Magnetic Flux Density ◽  
Magnetic Composite ◽  
Strain Sensing ◽  
Sensing Properties ◽  
Co Precipitation

The aim of this work is to investigate the strain sensing properties of polyester/magnetite composite materials of different contents 5, 10, 15, 20% w/w. Specifically, we manufactured magnetic composite materials with a polyester matrix (thermosetting polymer) and nanoparticles of magnetite (Fe3O4) as additives, processed by molding technique. For these composites we used two different magnetite powders of grain sizes a) 20-30nm (premade from Alfa Aesar) and b) <1 μm (powder made by the co-precipitation method in our laboratory). The specimens were subjected into tensile stress in order to observe the alternation of Reluctance induced by strain. The sensing probe is consisted of an electromagnet and a Hall sensor (magnetic flux density sensor). The electromagnets coil is supplied by direct current (DC) causing magnetic flux to circulate the core of the specimen. The results from the tensile stress experiments show that the magnetic flux density B decreases analogous to the Strain.

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