Anionic dye removal from aqueous solutions using modified zeolite: Adsorption kinetics and isotherm studies

Congo red adsorption tests reveal that the highest adsorption capacity (1735 mg g−1) is achieved for amorphous iron nanoparticles synthesized under ambient conditions.

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Superhigh Adsorption of Cadmium(II) Ions onto Surface Modified Nano Zerovalent Iron Composite (CNS-nZVI): Characterization, Adsorption Kinetics and Isotherm Studies

Chemistry & Chemical Technology ◽

10.23939/chcht15.04.457 ◽

2021 ◽

Vol 15 (4) ◽

pp. 457-464

Author(s):

Prabu Deivasigamani ◽

◽

Senthil Kumar Ponnusamy ◽

Sathish Sundararaman ◽

Suresh A ◽

...

Keyword(s):

Aqueous Solutions ◽

Adsorption Kinetics ◽

Freundlich Isotherm ◽

Zerovalent Iron ◽

Nanoscale Zerovalent Iron ◽

Cashew Nut ◽

Pseudo Second Order ◽

Cashew Nut Shell ◽

Surface Modified ◽

Adsorption Kinetics And Isotherm

The efficiency of surface modified nanoscale zerovalent iron (nZVI) composite by cashew nut shell (CNS) was tested for the removal of cadmium ions from the aqueous solutions. 2 g/l CNS-nZVI was efficient for 98% removal. The adsorption capacity was 35.58 mg/g. The Freundlich isotherm (R2 = 0.9769) and the pseudo-second order adsorption kinetics data fitted well. This proved CNS-nZVI has a high removal efficiency for Cd(II) from aqueous solutions.

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Comparative study of cationic and anionic dye removal from aqueous solutions using sawdust-based adsorbent

Environmental Progress & Sustainable Energy ◽

10.1002/ep.12334 ◽

2016 ◽

Vol 35 (4) ◽

pp. 1078-1090 ◽

Cited By ~ 21

Author(s):

Maryam Doltabadi ◽

Hossein Alidadi ◽

Mojtaba Davoudi

Keyword(s):

Comparative Study ◽

Aqueous Solutions ◽

Dye Removal ◽

Anionic Dye

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Removal of Arsenic(III) from Aqueous Solution Using Metal Organic Framework-Graphene Oxide Nanocomposite

Nanomaterials ◽

10.3390/nano8121062 ◽

2018 ◽

Vol 8 (12) ◽

pp. 1062 ◽

Cited By ~ 24

Author(s):

Tonoy Chowdhury ◽

Lei Zhang ◽

Junqing Zhang ◽

Srijan Aggarwal

Keyword(s):

Graphene Oxide ◽

Aqueous Solutions ◽

Adsorption Kinetics ◽

Metal Organic Framework ◽

Bet Surface Area ◽

Isotherm Models ◽

Solution Ph ◽

Adsorption Kinetics And Isotherm ◽

Removal Of Arsenic ◽

Kinetics And Isotherms

MIL-53(Al)-graphene oxide (GO) nanocomposites of different GO to MIL-53(Al) mass ratios (1% to 25% GO) were synthesized and tested for removal of arsenite (As(III)), which is a well-known groundwater contaminant. The properties of MIL-53(Al)-GO nanocomposites were characterized using X-ray Diffraction (XRD), Fourier Transform Infrared (FT-IR) Spectroscopy, Brunauer-Emmett-Teller (BET) surface area measurements, and Scanning Electron Microscopy (SEM). Batch experiments were performed on MIL-53(Al)-GO nanocomposites for As(III) adsorption in aqueous solutions to investigate adsorption kinetics and isotherm behavior under varying environmental conditions. The effects of solution pH (2 to 11), initial As(III) concentrations (10–110 mg/L), adsorbent dosage (0.2–3.0 g/L), and temperature (298–318 K) on As(III) adsorption were investigated. MIL-53(Al)-GO nanocomposites showed higher adsorption of As(III) than pristine MIL-53(Al) and GO individually. As (III) removal was optimized at a ratio of 3% GO in the MIL-53(Al)-GO nanocomposite, with an adsorption capacity of 65 mg/g. The adsorption kinetics and isotherms followed pseudo-second-order and Langmuir isotherm models, respectively. Overall, these results suggest that MIL-53(Al)-GO nanocomposite holds a significant promise for use in the remediation of As (III) from groundwater and other aqueous solutions.

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