Magnetic Removal of Cobalt from Waste Water by Ferrite Co-precipitation

Becker, F.L.; Rodríguez, D.S.; Schwab, M.

doi:10.1016/j.mspro.2012.06.087

Cited by 19 publications

(3 citation statements)

References 5 publications

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“…Cobalt is less toxic compared to most other metals present in wastewater. However, at higher concentrations it causes nausea, asthma, gastrointestinal problems and damage to the thyroid and liver [63, 64]. A number of nanoadsorbents have been used for the removal of cobalt from aqueous solution whose adsorption conditions are listed in Table 1.…”

Section: Nanoparticles For the Removal Of Specific Metalsmentioning

confidence: 99%

Review on nanoadsorbents: a solution for heavy metal removal from wastewater

Thekkudan

Vaidyanathan

Kumar³

et al. 2016

IET nanobiotechnol.

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Elimination of heavy metals from contaminated streams is of prime concern due to their ability to cause toxic chaos with the metabolism of flora and fauna alike. Use of advanced nano-engineered technologies such as the innovative combination of surface chemistry, chemical engineering fundamentals and nanotechnology opens up particularly attractive horizons towards treatment of heavy metal contaminated water resources. The obtained product of surface engineered nanoadsorbent produced has successfully proven to show rapid adsorption rate and superior sorption efficiency towards the removal of a wide range of defiant heavy metal contaminants in wastewater. The use of these materials in water treatment results in markedly improved performance features like large surface area, good volumetric potential, extra shelf-lifetime, less mechanical stress, stability under operational conditions with excellent sorption behaviour, no secondary pollution, strong chelating capabilities and they are easy to recover and reuse. This review intends to serve as a one-stop-reference by bringing together all the recent research works on nanoparticles synthesis and its advantages as adsorbents in the treatment of heavy metal polluted wastewater that have so far been undertaken, thereby providing researchers with a deep insight and bridging the gap between past, present and future of the elegant nanosorbents.

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Section: Nanoparticles For the Removal Of Specific Metalsmentioning

confidence: 99%

Review on nanoadsorbents: a solution for heavy metal removal from wastewater

Thekkudan

Vaidyanathan

Kumar³

et al. 2016

IET nanobiotechnol.

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“…Thus, the magnetic exchange interactions are expected to become more complex when magnetic ions occupy both A and B sites, as in the case of copper ferrite (CuFe 2 O 4 ) resulting in quite intriguing physical properties. From the applications' point of view, the components made-up of ferrite spinels have peculiar importance in the microwave sensors/actuators, magnetic filters, transformer cores, and magnetic switches [7][8][9][10][11][12][13]. On the other hand, the fundamental physical properties of ferrite spinels are of great interest to the scientific community because they exhibit tunable magnetic properties mainly driven by the cationic distribution and structure dependent magnetic ordering [14,15].…”

Section: Introductionmentioning

confidence: 99%

The role of Zn and Ru substitution on the structural, magnetic and dielectric properties of ferrite cuprospinels

Roy-Chowdhury,

Jena,

Khadse

et al. 2023

J. Phys. D: Appl. Phys.

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A comprehensive study on the structural, magnetic and dielectric behavior of ferrite cuprospinels with site specific substitution of non-magnetic Zn and weakly magnetic Ru ions has been presented. Such substitution leads to two classes of stable crystal symmetries (i) Tetragonal (I41/amd): CuFe1.95Ru0.05O4 and Cu0.95Zn0.05Fe1.95Ru0.05O4 and (ii) Cubic (Fd-3m): Cu0.60Zn0.40Fe1.95Ru0.05O4 and Cu0.05Zn0.95Fe1.95Ru0.05O4 bulk polycrystals. The former set of compounds undergo significant Jahn-Teller (JT) distortion due to high Cu content and such distortion gets lifted with the substitution of non-magnetic Zn ions. Ferrimagnetic (FiM) behavior is predominant in all these compounds except the highest Zn (95 at%) content cubic system with diluted substitution of Ru (2.5 at%) which exhibits antiferromagnetic (AFM) ordering below the Néel temperature (TN ~ 10.9 K). We employed Néel’s expression for FiM systems applicable for the two sublattice model to extract the dominant exchange interactions (JAA, JAB and JBB) between the A-site and B-site cations. For the tetragonally distorted Zn diluted system exhibits JAA/kB ~391 K with very high asymptotic Curie temperature, while the Zn-rich cubic system exhibits JAA/kB ~ 300 K. On the other hand, the tetragonally distorted spinel devoid of Zn exhibits dominant JBB/kB ~ 229 K with negligible JAA/kB and moderate JAB/kB (65 K) signifying that the JT active ions cause the onset of magnetic frustration and enhanced ordering temperatures. The ac-resistivity ρ(f,T) studies reveal that the mode of conduction follows Mott’s variable-range hopping (VRH) model with a linear logarithmic variation of ρac versus T-0.25. The temperature dependence of the VRH activation energy (24.5 meV ≤ Ea-VRH ≤ 67 meV at T = 50 K and 94 meV ≤ Ea-VRH ≤ 257 meV at T = 300 K) of charge carriers follows a linear behavior which indicates the presence of localized polaron in all the investigated systems.

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“…Wide-range and successful metal-extraction methods such as precipitation, electrodeposition, ion-exchange, forward osmosis, and adsorption have been used to complete collection of Co 2+ ion from solutions (e.g., PCB’s leach liquor). − The adsorption method associated with visual detection of metal ions has been recently recognized as one of the most effective methods because of its capability to promote metal-to-solid bindings monitored by the naked eye. This adsorption/detection technique offered high sensitivity even at levels of parts per billion (milligram per milliliter), high selective process, and then high collection capacity of metal ions. , On the basis of this adsorption/detection processing technique, various mesoporous adsorbents, collectors, trappers, and extractors have been developed for the extraction and adsorption of Co 2+ ions and others.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional, Vertical Platelets of ZnO Carriers for Selective Extraction of Cobalt Ions from Waste Printed Circuit Boards

Gomaa

El‐Safty

Shenashen

et al. 2018

ACS Sustainable Chem. Eng.

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Controlled design of low-cost, ecofriendly, and efficient metal recycling process of waste printed circuit boards (PCBs) is essential for sustainable industries. In this study, a metal extractor (ME) design was fabricated by anchoring organic chromophore chelate [(E)-4-((3-amino-4-hydroxyphenyl)diazenyl)naphthalen-1-ol (AHPDN)] into three-dimensional (3D) and vertical platelets of ZnO platforms to continuously extract and sensitively and selectively detect ultratrace Co2+ concentration (∼95.7%) in real e-waste leach liquor. Results reveal that the microscopic ZnO platelet hierarchy is successfully fabricated with nonstacked 3D platelet morphology through hydrothermal-assisted methodology. The 3D nonstacked ZnO platelets are oriented in horizontal and vertical domains, thereby enabling fabrication of potential ME for multidirectional diffusion and efficient adsorptivity of Co2+ ions. Multidiffusible, intermingled platelets and numerous active sites that decorated the ME hierarchy promote the ultratrace separation and recovery of Co2+ ions from PCBs. This scalable immobilization and accommodation of AHPDN along ZnO platelet surfaces effectively controls the Co2+ ion-recovery/extraction process. The selective adsorption of Co2+ ions in the presence of other competitive ions strongly depends on pH control assay. The consumed MEs can be repeatedly recycled, their platelet hierarchy and surface features are retained, and their selective adsorption functionalities are negligibly altered. Hierarchical MEs are suitable for the extraction of Co2+ from the waste PCBs.

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Magnetic Removal of Cobalt from Waste Water by Ferrite Co-precipitation

Cited by 19 publications

References 5 publications

Review on nanoadsorbents: a solution for heavy metal removal from wastewater

Review on nanoadsorbents: a solution for heavy metal removal from wastewater

The role of Zn and Ru substitution on the structural, magnetic and dielectric properties of ferrite cuprospinels

Three-Dimensional, Vertical Platelets of ZnO Carriers for Selective Extraction of Cobalt Ions from Waste Printed Circuit Boards

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