Amino-decorated magnetic metal-organic framework as a potential novel platform for selective removal of chromium (Vl), cadmium (II) and lead (II)

Mahmoud, Mohamed E.; Amira, Mohamed F.; Seleim, Seleim M.; Mohamed, Asmaa K.

doi:10.1016/j.jhazmat.2019.120979

Cited by 128 publications

(32 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This behavior may be due to utilization of all the available binding sites for adsorption at higher metal concentration (Srivastava et al 2015). Other researchers have reported similar results for the adsorption of chromium by different adsorbents (Abbas & Ali 2018;Mahmoud et al 2019). Statistical analysis of data by one-way ANOVA revealed the directional effect of the initial concentration on adsorption, which was significant (p , 0.05).…”

Section: Effect Of Initial Concentration Of Hexavalent Chromiumsupporting

confidence: 56%

Adsorption of hexavalent chromium ions from aqueous solutions using nano-chitin: kinetic, isotherms and thermodynamic studies

Sheikhi

Rezaei

2021

Water Practice and Technology

View full text Add to dashboard Cite

Treatment of the industrial wastewater before discharging into aquatic ecosystems using a new technology such as nanotechnology seems necessary. There are different methods for the removal of the heavy metals in the wastewater. In this study, nano-chitin was purchased from the Nano-Novin Polymer Company and used as an adsorbent for the removal of chromium (VI) ions from aqueous solution in a batch system. The effects of pH, temperature, contact time, concentration, and adsorbent dose were investigated. According to the results, the optimum conditions of adsorption occurred at pH = 6, temperature = 25 °C, 60 minute contact time, and 0.6 g·L−1 adsorbent dose. Investigation of equilibrium isotherms showed that the isotherm fitted the Freundlich model with a correlation coefficient of R2 = 0.9689. The pseudo second-order model with the larger correlation coefficient had a greater fitness against experimental data in the kinetic studies. Thermodynamic parameters such as Gibbs free energy, enthalpy, and entropy were calculated which indicated spontaneous, endothermic, and random processes, respectively. Given the good results of this project, nano-chitin can be suggested as a novel adsorbent which is highly capable of adsorbing hexavalent chromium from aqueous solutions.

show abstract

Section: Effect Of Initial Concentration Of Hexavalent Chromiumsupporting

confidence: 56%

Adsorption of hexavalent chromium ions from aqueous solutions using nano-chitin: kinetic, isotherms and thermodynamic studies

Sheikhi

Rezaei

2021

Water Practice and Technology

View full text Add to dashboard Cite

show abstract

“… 51 The negative values of Δ G° indicated that the adsorption mechanism of MB onto the CNC/ZnO nanocomposite was a favorable spontaneous process. According to some studies, 52 , 53 a value of enthalpy Δ H ° < 84 kJ/mol represents physisorption while the values between 84 and 420 kJ/mol are considered to be chemisorption. Therefore, it is an indication that the interaction mechanism for the sorption of MB onto CNC/ZnO could be chemical interaction.…”

Section: Resultsmentioning

confidence: 99%

Sawdust-Based Cellulose Nanocrystals Incorporated with ZnO Nanoparticles as Efficient Adsorption Media in the Removal of Methylene Blue Dye

et al. 2020

View full text Add to dashboard Cite

The continuous increase in the wastes generated from forestry, timber, and paper industries has engendered the need for their transformation into economically viable materials for the benefit of mankind. This study reports the preparation and application of sawdust-derived cellulose nanocrystals (CNC) incorporated with zinc oxide as a novel adsorbent for the removal of methylene blue (MB) from water. The CNC/ZnO nanocomposite was characterized using Fourier transform infrared, X-ray diffraction (XRD), and scanning electron microscopy. The amount of MB adsorbed was determined by a UV–vis spectrophotometer. The microscopic analysis revealed that the nanocomposite had a narrow particle size range and exhibited both spherical and rod-like morphologies. The XRD analysis of the nanocomposite showed characteristic high-intensity peaks in the range of 30–75° attributed to the presence of ZnO nanoparticles, which were responsible for the enhancement of the crystallinity of the nanocomposite. The results revealed a relationship between the MB removal efficiency and changes in solution pH, nanocomposite dosage, initial concentration, temperature, and reaction time. The adsorption equilibrium isotherm, measured in the temperature range of 25–45 °C and using a concentration of 20–100 mg/L, showed that the MB sorption followed the Langmuir isotherm with a maximum adsorption capacity of 64.93 mg/g. A pseudo-second-order kinetic model gave the best fit to the experimental data. Based on adsorption performance, the CNC/ZnO nanocomposite offers prospects for further research and application in amelioration of dye-containing effluent.

show abstract

“…As a result, various MMOFs were synthesized and applied in the extraction of Hg 2+ [178][179][180], Sn 2+ [181], Cr 3+ [182], Pb 2+ [183] from food samples. Figure 11a has illustrated the fabrication of novel MOFs meso-porous nFe 3 O 4 @MIL-88A(Fe)/3-aminopropyltrimethoxysilane (APTMS) nanocomposite, which exhibited excellent selective adsorption performance for heavy metal ions [184]. The maximum adsorption capacity for Cd 2+ , Pb 2+ and Cr 2+ achieved to 693.0, 536.22 and 1092.22 mg/g, respectively.…”

Section: Heavy Metal Ionsmentioning

confidence: 99%

“…(a) Proposed structure of nFe 3 O 4 @MIL-88A(Fe)/APTMS[184]. Copyright Journal of Hazardous Materials, 2019.…”

mentioning

confidence: 99%

Synthesis of Magnetic Metal-Organic Frame Material and Its Application in Food Sample Preparation

Yang

Wang

Pan

et al. 2020

Foods

View full text Add to dashboard Cite

A variety of contaminants in food is an important aspect affecting food safety. Due to the presence of its trace amounts and the complexity of food matrix, it is very difficult to effectively separate and accurately detect them. The magnetic metal-organic framework (MMOF) composites with different structures and functions provide a new choice for the purification of food matrix and enrichment of trace targets, thus providing a new direction for the development of new technologies in food safety detection with high sensitivity and efficiency. The MOF materials composed of inorganic subunits and organic ligands have the advantages of regular pore structure, large specific surface area and good stability, which have been thoroughly studied in the pretreatment of complex food samples. MMOF materials combined different MOF materials with various magnetic nanoparticles, adding magnetic characteristics to the advantages of MOF materials, which are in terms of material selectivity, biocompatibility, easy operation and repeatability. Combined with solid phase extraction (SPE) technique, MMOF materials have been widely used in the food pretreatment. This article introduced the new preparation strategies of different MMOF materials, systematically summarizes their applications as SPE adsorbents in the pretreatment of food contaminants and analyzes and prospects their future application prospects and development directions.

show abstract

Amino-decorated magnetic metal-organic framework as a potential novel platform for selective removal of chromium (Vl), cadmium (II) and lead (II)

Cited by 128 publications

References 52 publications

Adsorption of hexavalent chromium ions from aqueous solutions using nano-chitin: kinetic, isotherms and thermodynamic studies

Adsorption of hexavalent chromium ions from aqueous solutions using nano-chitin: kinetic, isotherms and thermodynamic studies

Sawdust-Based Cellulose Nanocrystals Incorporated with ZnO Nanoparticles as Efficient Adsorption Media in the Removal of Methylene Blue Dye

Synthesis of Magnetic Metal-Organic Frame Material and Its Application in Food Sample Preparation

Contact Info

Product

Resources

About