Magnetic Zeolite Research Articles

Selective recovery of rare earth elements from mine wastewater using the magnetic zeolite prepared by rare earth tailings

Selective recovery of rare earth elements from mine wastewater using the magnetic zeolite prepared by rare earth tailings

Quercetin loaded-magnetic zeolite nano-composite material and evaluate its anti-cancer effect.

Quercetin (QUR) is a major flavonoid that is abundantly present in the human diet, and has various therapeutic effects, including anti-cancer and anti-inflammatory properties. Of note, high doses of free QUR can be dangerous to normal cells. Furthermore, a considerable amount of free QUR would be metabolized until reaching cancerous cells. On one hand, chemotherapy drugs have some side effects towards normal cells. Besides, nano zeolite clinoptilolite (NZ-CP), a drug delivery system (DDS), has high specific surface area and is non-toxic. By applying magnetic zeolite nano-composite (MZNC), purposeful mobility of high doses of QUR, considering acidic microenvironment of tumor, is possible. The aim of this work is to evaluate and compare the anti-cancer impacts of QUR-loaded MZNC with doxorubicin (DOX) as an anti-cancer drug on HepG2 cell line as a human cancer cell line. Various concentrations of NZ-CP at different times to evaluate its safety in normal cells were assessed. Also, to assess the cell survival of the HepG2 cell line, various amounts of QUR-loaded MZNC, DOX, and NZ-CP within cell viability assay were investigated. Based on results of normal cells assay, it was revealed that NZ-CP has no toxicity toward normal cells. Furthermore, according to evaluations of cell viability assay, it was determined that specific concentrations (100 and 200mg/L) of QUR have a similar anti-cancer effect to DOX. Eventually, it was exhibited that NZ-CP has capability of controlled QUR release until reaching cancerous cells demonstrating its aptitude for drug delivery.

In Situ Synthesis of Magnetic Zeolite A From Coal Gangue and Its Adsorption Properties for Cu2+

ABSTRACTDue to the abundant SiO2 and Al2O3 content in coal gangue (CG), the synthesis of zeolite from CG has become a route to realize the high‐value utilization of CG. However, some impurities contained in CG, such as iron oxide and carbon, have an adverse impact on the crystallization and application of zeolites. In this work, we propose a strategy to directly convert CG into magnetic zeolite without the need for an external magnetic source. Carbon in CG is calcined to in situ reduce iron oxide to magnetite. This is followed by the hydrothermal reaction to synthesize magnetic zeolite A. Effects of m (NaOH)/m (CG), alkali fusion temperature, crystallization temperature, and time on the synthesis of zeolites are investigated. The synthesized zeolite A is magnetic and exhibits the cubic morphology with rounded corners, having a particle size of about 2 μm. The maximum adsorption capacity and removal ratio of magnetic zeolite A for Cu2+ are 91.74 mg/g and 98.50%, respectively. The solid–liquid separation test after adsorption shows that the magnetic zeolite A could achieve the accelerated solid–liquid separation within 15 min. This work provides a pathway to realize comprehensive utilization of CG and demonstrates a good adsorbent for practical application of highly efficient adsorption separation.

Exploration of magnetic zeolite thin film derived from coal fly ash an efficient sorbent: Application to water treatment.

Exploration of magnetic zeolite thin film derived from coal fly ash an efficient sorbent: Application to water treatment.

Heterogeneous Fenton-like Decolorization of Methyl Violet 2B Using Magnetic Zeolite Supported Guar Gum: Kinetics and Thermodynamics

Heterogeneous Fenton-like Decolorization of Methyl Violet 2B Using Magnetic Zeolite Supported Guar Gum: Kinetics and Thermodynamics

Removal of Copper Ions from Aqueous Solutions Using a Nanomembrane Ceramic Filter Doped with Magnetic Zeolite

Removal of Copper Ions from Aqueous Solutions Using a Nanomembrane Ceramic Filter Doped with Magnetic Zeolite

Exploring efficiency and regeneration of magnetic zeolite synthesized from coal fly ash for water treatment applications

Exploring efficiency and regeneration of magnetic zeolite synthesized from coal fly ash for water treatment applications

A hierarchical porous Fe3O4-COOH@H-ZIF-67 composite as magnetic solid-phase extraction adsorbent for benzimidazole pesticides

A hierarchical porous Fe3O4-COOH@H-ZIF-67 composite as magnetic solid-phase extraction adsorbent for benzimidazole pesticides

Design and characterisation of activated magnetic zeolite 4A from naturally occurring kaolin clay of Cameroonian origin for optimised dye removal by Fenton-like degradation

ABSTRACT The transformation of local clay material of Cameroonian origin into magnetic zeolite (Fe@Zeo-4A) for the degradation of acid-blue 90 in solution was investigate herein. The insertion of magnetic iron oxide particles into the zeolitic framework of Zeo-4A was achieved via hydrothermal synthesis. FT-IR spectroscopy, XRD and SEM confirmed the transformation of the clay into zeolite while EDX analysis and elemental mappings confirmed the presence of iron in the magnetic zeolite. Fe@Zeo-4A was strongly attracted to an external magnetic field. N2 adsorption-desorption studies revealed a considerable decrease in specific surface area and pore volume from the zeolite to the magnetic zeolite, suggesting the occupation of the pores of the zeolite by magnetite. The central composite design of the response surface methodology was used as optimisation approach for four parameters affecting the efficiency of degradation: solution pH, H2O2 concentration, initial dye concentration and time of stirring. ANOVA results revealed good correlation between the experimental and predicted results as well as the suitability of the linear regression model for describing the dye degradation process. An adjusted correlation coefficient of 85.17% was obtained for the dye degradation model. An optimal degradation percentage of 95.2% was obtained experimentally under optimal conditions of 7.6 for pH, 20 mg/L for dye concentration, 15.0 mol/L for [H2O2] and 15 min for time, in close agreement with a theoretical response of 96.6% predicted by the model. The magnetic zeolite was found to exhibit good stability over a wide pH range and lost only about 18% of its catalytic efficiency after five cycles of degradation experiments. Therefore, the novel magnetic zeolite-based material is an efficient Fenton catalyst for treating dye-contaminated wastewater.

Eco-friendly synthesis of magnetic zeolite A from red mud and coal gasification slag for the removal of Pb2+ and Cu2+

Eco-friendly synthesis of magnetic zeolite A from red mud and coal gasification slag for the removal of Pb2+ and Cu2+

Enhanced Capacity and Easily Separable Adsorbent of Dithizone-immobilized Magnetite Zeolite for Pb(II) Adsorption

In this study, magnetic natural zeolite (ZTM) was prepared using the coprecipitation method and dithizone was then immobilized on its surface in less toxic medium of alkaline to yield dithizone-immobilized magnetic zeolite (ZTM-Dtz). The synthesized ZTM-Dtz was characterized by FTIR and XRD, indicating that dithizone was successfully immobilized on the surface of ZTM. Vibrating sample magnetometer measurements showed superparamagnetic properties of either ZTM or ZTM-Dtz with magnetization values of 7.35 and 11.49 emu g−1, respectively. The adsorption kinetics of Pb(II) on both adsorbents followed a pseudo-second-order and their adsorption isotherms were properly described by the Langmuir model. The adsorption capacity of ZTM and ZTM-Dtz were 6.94 and 38.46 mg g−1, respectively, suggesting that dithizone immobilization enhanced the adsorbent capacity more than 5 times. The interaction mechanism between Pb(II) metal ion and ZTM was dominated by ion exchange, whereas that of ZTM-Dtz was mostly hydrogen bonds and complexation. The synthesized material is promising to be developed for the adsorption of heavy metal ions such as Pb(II) because it provides a high adsorption capacity and the adsorbents can be easily separated magnetically after application.

Cytotoxicity and Genotoxicity Effects of a Magnetic Zeolite Composite in Daphnia magna (Straus, 1820).

Zeolite type 5A combined with the magnetic properties of maghemite nanoparticles facilitate the rapid absorption of heavy metals, which makes them an interesting proposal for the remediation of water contaminated with lead and arsenic. However, the physicochemical analysis related to concentration and size for the use of this magnetic zeolite composite (MZ0) in water bodies and the possible toxicological effects on aquatic fauna has not yet been carried out. The main objective of the research work is to determine lethal concentrations that cause damage to Daphnia magna based on LC50 tests, morphology, reproductive rate, and quantification of the expression of three genes closely involved in the morphological development of vital structures (Glass, NinaE, Pph13). To achieve this objective, populations of neonates and young individuals were used, and results showed that the LC50 for neonates was 11,314 mg L-1, while for young individuals, it was 0.0310 mg L-1. Damage to morphological development was evidenced by a decrease in eye size in neonates, an increase in eye size in young individuals, variations in the size of the caudal spine for both age groups, and slight increases in the heart size, body, and antenna for both age groups. The reproductive rate of neonates was not affected by the lower concentrations of MZ0, while in young individuals, the reproductive rate decreased by more than 50% from the minimum exposure concentration of MZ0. And for both ages, Glass gene expression levels decreased as the MZ0 concentration increased. Also, the MZ0 evidenced its affinity for the exoskeleton of D. magna, which was observed using both light microscopy and electron microscopy. It is concluded that MZ0 did not generate significant damage in the mortality, morphology, reproductive rate, or gene expression in D. magna at lower concentrations, demonstrating the importance of evaluating the possible impacts on different life stages of the cladoceran.

In-situ honeycomb spheres for enhanced enzyme immobilization and stability

In-situ honeycomb spheres for enhanced enzyme immobilization and stability

Removal of Methyl Violet 2B and Direct Black 22 from Single and Binary System Using a Magnetic Zeolite/MgO/Starch/Fe3O4 Nanocomposite

This study focuses on the preparation and characterization of magnetic zeolite (FSM-Zeo) using starch, magnesium oxide, and Fe3O4. Various analyses, including BET, FTIR, SEM, EDS, XRD, Zeta potential, and VSM, were conducted to assess the properties of FSM-Zeo. The adsorption capacity of FSM-Zeo was investigated for methyl violet (MV-2B) and direct black 22 (DB-22) in both single and binary dye solutions. Key parameters such as adsorbent amount, initial dye concentration, contact time, temperature, initial pH, and ionic strength were examined in the single system. Kinetic and isotherm studies revealed that DB-22 and MV-2B adsorption followed the pseudo-second-order model. Moreover, Freundlich and Langmuir models were confirmed for MV-2B and DB-22 adsorption on FSM-Zeo, respectively. In the binary system, the presence of MV-2B enhanced the adsorption of DB-22, resulting in higher removal compared to the single dye solution. A synergistic effect was observed due to the interaction between DB-22 and MV-2B, promoting the adsorption of DB-22 on FSM-Zeo.

A novel and cost-effective synthesis of magnetic zeolite 4A using kaolinite and red mud for Sr(II) removal

A novel and cost-effective synthesis of magnetic zeolite 4A using kaolinite and red mud for Sr(II) removal

Vortex-blending matrix solid-phase dispersion and UPLC-Q-TOF/MS were proposed to extract and examine the urushiols from Toxicodendron vernicifluum bark

Vortex-blending matrix solid-phase dispersion and UPLC-Q-TOF/MS were proposed to extract and examine the urushiols from Toxicodendron vernicifluum bark

Adsorption and immobilization of phosphorus from water and sediments using a lanthanum-modified natural zeolite: Performance, mechanism and effect

Adsorption and immobilization of phosphorus from water and sediments using a lanthanum-modified natural zeolite: Performance, mechanism and effect

Magnetic Zeolite: Synthesis and Copper Adsorption Followed by Magnetic Separation from Treated Water

Zeolites are widely used in diverse applications, including the removal of heavy metals from wastewater. However, separating fine-sized zeolite particles from treated water is often a challenge. In this work, a novel method utilizing a colloidal polyvinyl alcohol (PVA) solution to bind iron oxide nanoparticles to a Linde Type A (LTA) zeolite was used to synthesize magnetic zeolite. Different zeolite–iron oxide nanoparticle loadings (10:1, 10:0.5, and 10:0.1) were used in batch adsorption experiments to investigate adsorption capacities and kinetics for Cu removal from an aqueous solution. The results showed that the magnetic zeolite maintained much of its adsorbent properties while facilitating a simplified process design. Thus, the adsorption capacity of pure LTA zeolite was found to be 262 mg/g for magnetic zeolite, with a 10:1 ratio—151 mg/g; 10:0.5—154 mg/g; and 10:0.1—170 mg/g. Magnetic separation was subsequently employed to remove the magnetic zeolite from the treated solution.

Magnetic zeolite@β-cyclodextrin-gum Arabic nanocomposite for adsorptive removal of levofloxacin

Magnetic zeolite@β-cyclodextrin-gum Arabic nanocomposite for adsorptive removal of levofloxacin

Ultra-High Adsorption Capacity of Core-Shell-Derived Magnetic Zeolite Imidazolate Framework-67 as Adsorbent for Selective Extraction of Theophylline.

A core-shell-derived structural magnetic zeolite imidazolate framework-67 (Fe3O4-COOH@ZIF-67) nanocomposite was fabricated through a single-step coating of zeolite imidazolate framework-67 on glutaric anhydride-functionalized Fe3O4 nanosphere for the magnetic solid-phase extraction (MSPE) of theophylline (TP). The Fe3O4-COOH@ZIF-67 nanocomposite was characterized through scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectrometry, Fourier transform infrared spectroscopy, Zeta potential analysis, X-ray diffraction, Brunauer-Emmett-Teller, and vibrating sample magnetometer. The material has a high specific surface area and good magnetism, which maintains the regular dodecahedron structure of ZIF-67 without being destroyed by the addition of Fe3O4-COOH nanospheres. The Fe3O4-COOH@ZIF-67 can rapidly adsorb TP mainly through the strong coordination interaction between undercoordinated Co2+ on ZIF-67 and -NH from imidazole of TP. The adsorption and desorption conditions, such as the amount of adsorbent, adsorption time, pH value, and elution solvent, were optimized. The kinetics of TP adsorption on Fe3O4-COOH@ZIF-67 was found to follow pseudo-second-order kinetics. The Langmuir model fits the adsorption data well and the maximum adsorption capacity is 1764 mg/g. Finally, the developed MSPE-HPLC method was applied in the enrichment and analysis of TP in four tea samples and rabbit plasma. TP was not detected in oolong tea and rabbit plasma, and its contents in jasmine tea, black tea, and green tea are 5.80, 4.31, and 1.53 μg/g, respectively. The recoveries of spiked samples are between 74.41% and 86.07% with RSD in the range of 0.81-3.83%. The adsorption performance of Fe3O4-COOH@ZIF-67 nanocomposite was nearly unchanged after being stored at room temperature for at least 80 days and two consecutive adsorption-desorption cycles. The results demonstrate that Fe3O4-COOH@ZIF-67 nanocomposite is a promising magnetic adsorbent for the preconcentration of TP in complex samples.