Application of a new metal-organic framework of [Ni2F2(4,4′-bipy)2(H2O)2](VO3)2.8H2O as an efficient adsorbent for removal of Congo red dye using experimental design optimization

Zolgharnein, Javad; Farahani, Saeideh Dermanaki; Bagtash, Maryam; Amani, Saeid

doi:10.1016/j.envres.2019.109054

Cited by 38 publications

(6 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…75 Because of the endothermic nature of the copper ions adsorption process and positive and high ΔH values, the adsorption mechanism is unequivocally chemisorption. 17,68 This is consistent with the results of the kinetic and isotherm study that type of adsorption was inferred chemically, because, as mentioned, the experimental data obey the pseudo-second-order kinetic and Langmuir isotherm models that their assumption is chemisorption. 59,[65][66][67]69 Furthermore, the calculated E (11.93 and 14.5 kJ.mol À1 ) values of DR isotherm are between 8 and 16.…”

Section: Adsorption Process Study: Kinetics Isotherm and Thermodynamicssupporting

confidence: 88%

“…Isotherm, kinetics, and thermodynamics of the Cu(II) adsorption process were studied under the obtained optimal conditions. The following equations were used to identify the most consistent isothermal model 10,17,18

Determination coefficient : R^{2} = \frac{\sum {(q_{e . meas} - {\overset{q}{true}}_{e . cal})}^{2}}{\sum ((), {(q_{e . meas} - {\overset{q}{true}}_{e . cal})}^{2} + {(q_{e . meas} - q_{e . cal})}^{2})}

Nonlinear chi goodbreak- square : χ^{2} goodbreak= \sum_{i = 1}^{n} \frac{{((), q_{e . italicmeas} goodbreak- q_{e . italiccal})}^{2}}{q_{e . cal}}

Normalized standard deviation : ∆ q goodbreak= \sqrt{\frac{\sum {([], ((), q_{e . italicmeas} goodbreak- q_{e . italiccal}) / q_{e . italicmeas})}^{2}}{n - 1}}

{\overset{true¯}{q}}_{e . italiccal} goodbreak= \frac{true}{\sum q_{e . italiccal}}

where n is the data number and q e,cal and q e,meas are equilibrium adsorption capacities, obtained from calculation and experiment, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Many reports about the removal of metal ions from water sources by various adsorbents including biosorbent, metal oxides, and nanocomposites are available in the literature survey 1–8,11–16 . However, recently, a new class of efficient and interesting adsorbent called metal–organic framework (MOF) has been encouraged the researchers of the adsorption process 17–31 …”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][11][12][13][14][15][16] However, recently, a new class of efficient and interesting adsorbent called metal-organic framework (MOF) has been encouraged the researchers of the adsorption process. [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] MOFs are crystalline nanoporous solids with regular and infinite arrays composed of two main components: metal ions and connector organic ligands. [25][26][27][28][29][30] Due to their valuable properties including diverse structures, adjustable topologies, and porosity, they are utilized as excellent adsorbents for storage and separation of heavy metal ions, anions (e.g., phosphate), dyes, drugs, or gases (e.g., methane, hydrogen, and carbon dioxide).…”

mentioning

confidence: 99%

See 3 more Smart Citations

Experimental design optimization and isotherm modeling for removal of copper(II) by calcium‐terephthalate MOF synthesized from recycled PET waste

Zolgharnein

Farahani

2022

Journal of Chemometrics

Self Cite

View full text Add to dashboard Cite

In this research, a calcium-terephthalate metal-organic framework ([Ca(BDC) (H 2 O) 3 ]) was synthesized by a new high yield solvothermal method as an efficient adsorbent. Terephthalate ligand recovered from polyethylene terephthalate (PET) waste was used as a precursor in the synthesis process. The adsorption ability of this compound to remove copper(II) from aqueous solutions was investigated. Experimental designs involving Plackett-Burman and Doehlert designs were used for the optimization of the adsorption process. Plackett-Burman design was used for screening the effective factors such as pH, adsorbent dosage, and initial concentration of Cu(II). Running Doehlert design (DD) as an optimization approach led to find a model for relation between response and effective factors and maximized uptake capacity (q) of Cu(II) (q = 351.3 mgg À1 ) under optimum conditions (pH = 5, adsorbent dosage = 1.50 mg and initial concentration of Cu(II) = 150 mgL À1 ). Infrared spectroscopy (FTIR), X-ray diffraction (XRD), energy-dispersive X-ray (EDX), and field-emission scanning electron microscopy (FESEM) analyses were applied to investigate the chemical and crystal structure of [Ca(BDC)(H 2 O) 3 ]. Furthermore, kinetics, isotherms, thermodynamics, and desorption studies are complementary divisions of this research.

show abstract

Section: Adsorption Process Study: Kinetics Isotherm and Thermodynamicssupporting

confidence: 88%

Determination coefficient : R^{2} = \frac{\sum {(q_{e . meas} - {\overset{q}{true}}_{e . cal})}^{2}}{\sum ((), {(q_{e . meas} - {\overset{q}{true}}_{e . cal})}^{2} + {(q_{e . meas} - q_{e . cal})}^{2})}

Nonlinear chi goodbreak- square : χ^{2} goodbreak= \sum_{i = 1}^{n} \frac{{((), q_{e . italicmeas} goodbreak- q_{e . italiccal})}^{2}}{q_{e . cal}}

Normalized standard deviation : ∆ q goodbreak= \sqrt{\frac{\sum {([], ((), q_{e . italicmeas} goodbreak- q_{e . italiccal}) / q_{e . italicmeas})}^{2}}{n - 1}}

{\overset{true¯}{q}}_{e . italiccal} goodbreak= \frac{true}{\sum q_{e . italiccal}}

where n is the data number and q e,cal and q e,meas are equilibrium adsorption capacities, obtained from calculation and experiment, respectively.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Experimental design optimization and isotherm modeling for removal of copper(II) by calcium‐terephthalate MOF synthesized from recycled PET waste

Zolgharnein

Farahani

2022

Journal of Chemometrics

Self Cite

View full text Add to dashboard Cite

show abstract

“…Congo red (CR)는 아조계열 음이온 염료로서 섬유, 인쇄, 염색 산업 등에서 주로 많이 사용되고 있으며 세계에서 가 장 많이 사용되고 있는 염료 중의 하나로 알려져 있다. 11,12) CR은 복잡한 방향족 구조로 인해 물리적, 화학적 안정성이…”

unclassified

Enhancement of the Congo Red Adsorption Capacity of Biochars by Surface Modification with MgCl2 Pretreatment

HeeSo¹,

Chang²

2020

J Korean Soc Environ Eng

View full text Add to dashboard Cite

Objectives : The physicochemical characteristics of Mg-biochar composites derived from kelp and pine after pretreatment with MgCl2 were analyzed, and their adsorption capacities for an anionic dye, Congo red (CR), were evaluated.Methods : After pretreating 60 g of kelp and pine sawdust in 1 L of 0.1 M MgCl2･6H2O, the raw materials were pyrolyzed at 500℃ to produce Mg-biochar composites (kelp based KB-Mg and pine based PB-Mg). The fundamental physicochemical characteristics of the Mg-biochar composites were examined, and their adsorption capacities for CR were investigated using different initial pH values, adsorption kinetic models, and adsorption isotherm models.Results and discussion : The Mg-biochar composites showed the development of uniform deposits of Mg minerals primarily as MgO crystal on the surface by the surface modification with MgCl2. When the pristine biochars were surface-modified with MgCl2, their adsorption capacities for CR were significantly increased over the entire pH range tested. The CR adsorption process by all biochars was best described with the pseudo-first order kinetics model, and the adsorption isotherm characteristics were better described with the Langmuir isotherm model for all biochars. The Langmuir maximum adsorption capacities for KB-Mg and PB-Mg were 423.0 mg/g and 394.7 mg/g, respectively. It is suggested that the main mechanism for CR adsorption on the Mg-biochars is electrostatic attraction between CR and the biochars.Conclusions : The results showed that surface modification with MgCl2 could greatly enhance the CR adsorption capacity of biochars, and the results demonstrated the great potential of KB-Mg and PB-Mg for CR removal.

show abstract

Synthesis of Amphiphilic Silica with High Exposure of Surface Groups and Its Utilization in Efficient Removal of Organic Dyes from Aqueous Solution

Yang

Qiu

Weng

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

Amphiphilic silica is synthesized with the simultaneous introduction of two kinds of polar and weakly polar organic groups on its surface using a one-step reverse-phase microemulsion method. The obtained materials present as nanospheres with a size of ≈100 nm. A high percentage (≈80%) of silicon species can be exposed and the amount of surface SiOH increased by above 50% with the introduction of organic groups. Plenty of groups, including polar groups (3-aminopropyl and hydroxyl) and weakly polar group (n-propyl) coexisting on the surface, enable the material to show amphiphilicity. This amphiphilic material can show an excellent property for the removal of various organic dyes from the aqueous solution, and the maximum adsorption capacity of Congo Red,

show abstract

Application of a new metal-organic framework of [Ni2F2(4,4′-bipy)2(H2O)2](VO3)2.8H2O as an efficient adsorbent for removal of Congo red dye using experimental design optimization

Cited by 38 publications

References 55 publications

Experimental design optimization and isotherm modeling for removal of copper(II) by calcium‐terephthalate MOF synthesized from recycled PET waste

Experimental design optimization and isotherm modeling for removal of copper(II) by calcium‐terephthalate MOF synthesized from recycled PET waste

Enhancement of the Congo Red Adsorption Capacity of Biochars by Surface Modification with MgCl2 Pretreatment

Synthesis of Amphiphilic Silica with High Exposure of Surface Groups and Its Utilization in Efficient Removal of Organic Dyes from Aqueous Solution

Contact Info

Product

Resources

About