Publication detail

A study on the uptake of methylene blue by biodegradable and eco-friendly carboxylated starch grafted polyvinyl pyrrolidone

Haq, Fazal Farid, Arshad Ullah, Naveed Kiran, Mehwish Khan, Rizwan Ullah Aziz, Tariq Mehmood, Sahid Haroon, Muhammad Mubashir, Muhammad Bokhari, Awais Chuah, Lai Fatt Show, Pau Loke

Original Title

A study on the uptake of methylene blue by biodegradable and eco-friendly carboxylated starch grafted polyvinyl pyrrolidone

Type

journal article in Web of Science

Language

English

Original Abstract

This study is based on the removal of methylene blue (MB) from aqueous solution by cost effective and biodegradable adsorbent carboxymethyl starch grafted polyvinyl pyrolidone (Car-St-g-PVP). The Car-St-g-PVP was synthesized by grafting vinyl pyrolidone onto carboxymethyl starch by free radical polymerization reaction. The structure and different properties of Car-St-g-PVP were determined by 1H NMR, FT-IR, XRD, TGA and SEM. A series of batch experiments were conducted for the removal of MB, The adsorption affecting factors such as temperature, contact time, initial concentration of MB dye, dose of Car-St-g-PVP and pH were studied in detail. The other parameters like the thermodynamic study, kinetics and isothermal models were fitted to the experimental data. The results showed that pseudo 2nd order kinetics and Langmuir's adsorption isotherms were best fitted to experimental data with regression coefficient R2 viz. 0.99 and 0.97. The kinetic study showed that the adsorption mechanism favored chemisorption. The Gibbs free energy (ΔG°) for the adsorption process was found to be −7.31 kJ/mol, −8.23 kJ/mol, −9.00 kJ/mol and −10.10 kJ/mol at 25 °C, 35 °C, 45 °C and 55 °C respectively. The negative values of ΔG° suggested the spontaneous nature of the adsorption process. Similarly, the positive values of entropy and enthalpy 91.27 J/k.mol and 19.90 kJ/mol showed the increasing randomness and endothermic nature of the adsorption process. The value of separation factor (RL) was found to be less than one (RL < 1), which supported the feasibility of the adsorption process. The maximum MB removal percentage (% R) was found to be 98.6%. So, these findings show that Car-St-g-PVP can be meritoriously used for the treatment of MB from wastewater.

Keywords

Eco-friendly adsorbent; Adsorption; Methylene blue; Thermodynamics; Isotherm; Kinetics

Authors

Haq, Fazal; Farid, Arshad; Ullah, Naveed; Kiran, Mehwish; Khan, Rizwan Ullah; Aziz, Tariq; Mehmood, Sahid; Haroon, Muhammad; Mubashir, Muhammad; Bokhari, Awais; Chuah, Lai Fatt; Show, Pau Loke

Released

1. 12. 2022

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE

Location

San Diego

ISBN

0013-9351

Periodical

ENVIRONMENTAL RESEARCH

Number

215

State

United States of America

Pages from

114241

Pages to

114241

Pages count

12

URL

https://www.sciencedirect.com/science/article/pii/S0013935122015687?via%3Dihub

BibTex

@article{BUT182640,
  author="Haq, Fazal and Farid, Arshad and Ullah, Naveed and Kiran, Mehwish and Khan, Rizwan Ullah and Aziz, Tariq and Mehmood, Sahid and Haroon, Muhammad and Mubashir, Muhammad and Bokhari, Awais and Chuah, Lai Fatt and Show, Pau Loke",
  title="A study on the uptake of methylene blue by biodegradable and eco-friendly carboxylated starch grafted polyvinyl pyrrolidone",
  journal="ENVIRONMENTAL RESEARCH",
  year="2022",
  number="215",
  pages="12",
  doi="10.1016/j.envres.2022.114241",
  issn="0013-9351",
  url="https://www.sciencedirect.com/science/article/pii/S0013935122015687?via%3Dihub"
}