Nanoscale nickel metal organic framework decorated over graphene oxide and carbon nanotubes for water remediation

Ahsan, Ariful; Jabbari, Vahid; Imam, Muhammad A.; Castro, Edison; Kim, Hoejin; Curry, Michael L.; Valles-Rosales, Delia J.; Noveron, Juan C.

doi:10.1016/j.scitotenv.2019.134214

Cited by 107 publications

(37 citation statements)

References 53 publications

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“…Dyes are mostly organic molecules that can attach themselves to fabrics or surfaces to impart colour. Synthetic dyes are largely used in many sectors of advanced technology, such as in the textile, paper, plastics, food processing, leather tanning, printing, rubber and cosmetics industries [1,2]. Annually around 7 × 10 5 tons of commercial synthetic dyes is produced worldwide and the textile industry alone consumes more than 10,000 tons of dyes.…”

Section: Introductionmentioning

confidence: 99%

Process optimisation of methylene blue sequestration onto physical and chemical treated coffee husk based adsorbent

Murthy

Gowrishankar

2020

SN Appl. Sci.

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Coffee husk (CH) was physically and chemically treated with autoclaving (SCH) and NaOH (NCH) to develop low-cost adsorbent for the removal of methylene blue (MB) from synthetic wastewater, and their adsorption efficiencies were evaluated in batch mode. The prepared adsorbent was characterised by SEM, FTIR and point of zero charge. The central composite rotatable design (CCRD) was employed to optimise the adsorption process parameters such as pH, adsorbent dosage and initial MB concentration. The second-order quadratic model fitted best with the experimental adsorption data, and ANOVA results showed that the developed model was significant. The linear terms in the model significantly influence the adsorption capacity of SCH and NCH, but interaction terms were not significant. At optimised conditions, the developed adsorbents can remove > 90% of MB from the aqueous solution. Freundlich model showed a better fit with the adsorption isotherm data with R 2 greater than 0.95. Kinetics of MB adsorption onto SCH and NCH followed the pseudo-second-order model. The maximum monolayer adsorption capacity was found to be 129 and 200 mg/g for SCH and NCH, respectively. The present study showed that pretreated coffee husk waste can be used as an alternative for expensive adsorbents for the removal of dyes from wastewater.

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Section: Introductionmentioning

confidence: 99%

Process optimisation of methylene blue sequestration onto physical and chemical treated coffee husk based adsorbent

Murthy

Gowrishankar

2020

SN Appl. Sci.

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“…The applicability of the model is compared by considering the correlation coefficient (R 2 ) values. The linearized form of isotherm models is as follows [ 44 , 45 , 46 ]. Langmuir model equation—C e /Q e = 1/Q m. K b + C e /Q m Freundlich model equation—lnQ e = lnk + (1/n) lnC e Temkin model equation—Q e = B ln a T + B lnC e where B =

Dubinin-Radushkevich model—ln Qm – KE 2 where C e is the equilibrium concentration (mg L −1 ), Q e is the amount adsorbed (mg g −1 ).…”

Section: Resultsmentioning

confidence: 99%

Aminophosphonic Acid Functionalized Cellulose Nanofibers for Efficient Extraction of Trace Metal Ions

et al. 2020

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Cellulose nanofibers were covalently functionalized using diethylenetriamine penta (methylene phosphonic acid) and studied for the extraction of heavy metal ions. The surface-functionalized nanofibers showed a high adsorption capacity towards heavy metal ions as compared to bare nanofibers. The elemental composition and surface morphology of the prepared bio-adsorbent was characterized by X-ray photoelectron spectroscopy, attenuated total reflectance infrared spectroscopy, field emission scanning electron microscopy, and energy dispersive spectroscopy. The prepared material was studied to develop a column-based solid phase extraction method for the preconcentration of trace metal ions and their determination by inductively coupled plasma optical emission spectroscopy. The batch experimental data was well fitted to Langmuir adsorption isotherms (R2 > 0.99) and follows pseudo-second-order kinetics. The experimental variables such as sample pH, equilibrium time, column breakthrough, sorption flow rate, the effect of coexisting ions, and eluent type were systematically studied and optimized accordingly. The detection limit of the proposed method was found to be 0.03, 0.05, and 0.04 µg L−1 for Cu(II), Pb(II), and Cd(II), respectively. Certified Reference Materials were analyzed to validate the proposed method against systematic and constant errors. At a 95% confidence level, the Student’s t-test values were less than the critical Student’s t value (4.302). The developed method was successfully employed for the preconcentration and determination of trace metal ions from real water samples such as river water and industrial effluent.

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“…In this research, the kinetic modeling study was checked by pseudo-first-order, pseudo-secondorder, and intraparticle models. Equation 3 shows the linear form of the pseudo-first-order model [21]:…”

Section: Kinetic Modelingmentioning

confidence: 99%

“…Weber and Morris have announced the intraparticle diffusion model to distinguish the mass transfer resistance of the adsorption process onto the adsorbent [21]. The model is given by Eq.…”

Section: Kinetic Modelingmentioning

confidence: 99%

Enhanced adsorptive removal of Indigo carmine dye performance by functionalized carbon nanotubes based adsorbents from aqueous solution: equilibrium, kinetic, and DFT study

2019

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The present work considers an adsorptive removal of Indigo carmine (IC) dye onto nanotube carbon (CNTs). The pure CNTs were prepared via chemical vapor deposition (CVD) method utilizing methane gas as a carbon source at 1000 °C in a quartz tube. The morphology and surface chemical structure of the adsorbents were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption/desorption technique, and thermal gravity analysis (TGA). The parameters of the IC dye adsorption, such as initial concentration, contact time, pH, and mass-loaded adsorbent, were evaluated. The kinetic study confirmed that a pseudo-second-order model was best fitted to the adsorption data. The removal efficiency of adsorption onto pure and COOH-functionalized CNTs was 84% and 98.7% at 15 min, respectively. The equilibrium results were fitted well to the Langmuir isotherm model. The adsorption capacity of the CNT and COOH-CNT was 88.5 and 136 mg/g, respectively. The reusability of the adsorbents was studied, and after eight cycles, the efficiency decreased to 70%. Moreover, the density functional theory calculations confirmed that the functionalization of CNTs with COOH groups improves the adsorption properties of IC due to the formation of hydrogen-bonding interactions.

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Nanoscale nickel metal organic framework decorated over graphene oxide and carbon nanotubes for water remediation

Cited by 107 publications

References 53 publications

Process optimisation of methylene blue sequestration onto physical and chemical treated coffee husk based adsorbent

Process optimisation of methylene blue sequestration onto physical and chemical treated coffee husk based adsorbent

Aminophosphonic Acid Functionalized Cellulose Nanofibers for Efficient Extraction of Trace Metal Ions

Enhanced adsorptive removal of Indigo carmine dye performance by functionalized carbon nanotubes based adsorbents from aqueous solution: equilibrium, kinetic, and DFT study

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