Polyethylene Glycol-Modified Layered Double Hydroxides: Synthesis, Characterization, and Study on Adsorption Characteristics for Removal of Acid Orange II from Aqueous Solution | Zendy

Sujata Mandal | Zendy; Sandhya Kalaivanan | Zendy; Asit Baran Mandal | Zendy

Open Access

Polyethylene Glycol-Modified Layered Double Hydroxides: Synthesis, Characterization, and Study on Adsorption Characteristics for Removal of Acid Orange II from Aqueous Solution

Author(s) -

Sujata Mandal,

Sandhya Kalaivanan,

Asit Baran Mandal

Publication year - 2019

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.8b02743

Subject(s) - adsorption , freundlich equation , polyethylene glycol , aqueous solution , langmuir , thermogravimetric analysis , langmuir adsorption model , fourier transform infrared spectroscopy , chemistry , layered double hydroxides , endothermic process , peg ratio , chemical engineering , nuclear chemistry , materials science , organic chemistry , finance , engineering , economics

The present study aimed to improve the adsorption characteristics of the pristine layered double hydroxide (LDH) by physicochemical modification using polyethylene glycol (PEG 400 ), a nontoxic hydrophilic polymer. With this objective, LDH was synthesized and modified with different concentrations of PEG 400 . The PEG-modified LDHs (LDH/PEGs) were characterized using X-ray diffraction, thermogravimetric analysis, Brunauer-Emmett-Teller surface area and porosity measurement, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, and zeta potential measurements. The adsorption properties of the pristine LDH (PLDH) and the LDH/PEGs were studied for the removal of Acid Orange II from water, and the results were compared. The PLDH treated with 15% PEG solution showed ∼30% increase in adsorption capacity as compared to the PLDH. The adsorption isotherm data were analyzed using Langmuir, Freundlich, and Temkin isotherm models. The values of thermodynamic parameters such as Δ S and Δ H showed the spontaneous and endothermic nature of the adsorption process. The adsorption kinetics data for both PLDH and the LDH/PEG adsorbents presented a good fit to the pseudo-second-order kinetic model.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research