Atrazine removal using chitin-cl-poly(acrylamide-co-itaconic acid) nanohydrogel: Isotherms and pH responsive nature

Gaurav Sharma; Bharti Thakur; Amit Kumar; Shweta Sharma; Mu Naushad; Florian J Stadler

doi:10.1016/j.carbpol.2020.116258

Atrazine removal using chitin-cl-poly(acrylamide-co-itaconic acid) nanohydrogel: Isotherms and pH responsive nature

Carbohydr Polym. 2020 Aug 1:241:116258. doi: 10.1016/j.carbpol.2020.116258. Epub 2020 May 5.

Authors

Gaurav Sharma¹, Bharti Thakur², Amit Kumar³, Shweta Sharma², Mu Naushad⁴, Florian J Stadler⁵

Affiliations

¹ College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Lab. for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen, 518060, PR China; School of Chemistry, Shoolini University, Solan 173212, Himachal Pradesh, India. Electronic address: gaurav8777@gmail.com.
² School of Chemistry, Shoolini University, Solan 173212, Himachal Pradesh, India.
³ College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Lab. for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen, 518060, PR China; School of Chemistry, Shoolini University, Solan 173212, Himachal Pradesh, India.
⁴ Department of Chemistry, College of Science, King Saud University, Bld.#5, Riyadh, Saudi Arabia.
⁵ College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Lab. for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen, 518060, PR China.

PMID: 32507180
DOI: 10.1016/j.carbpol.2020.116258

Abstract

Removal of commonly used pesticide, atrazine was examined by employing chitin based nanohydrogel. Chitin-cl-poly (acrylamide-co-itaconic acid) nanohydrogel was synthesized by microwave method. Dissolution of chitin was done by freezing thawing method in NaOH/urea solution. The morphology and functional characteristics were confirmed by FTIR, XRD, SEM, TGA, TEM, and EDX techniques. Maximum swelling capacity, isotherm study, kinetics, adsorption and desorption of atrazine pesticide were evaluated in this study. Maximum adsorption capacity of designed nanohydrogel was found to be 204.08 mg/g. Langmuir and pseudo- second order models were determined to be applicable for explaining the undertaken adsorption process. Neutral pH was found to be favorable for maximum adsorption. In addition, results have specified the pH responsive nature of nanohydrogel for controlled release of atrazine.

Keywords: Adsorption; Chitin; Desorption; Isotherm study; Nanohydrogel; pH responsive.

MeSH terms

Acrylic Resins / chemistry*
Adsorption
Atrazine / chemistry*
Chitin / chemistry*
Herbicides / chemistry*
Hydrogels / chemistry*
Hydrogen-Ion Concentration
Nanostructures / chemistry*
Succinates / chemistry*
Water Pollutants, Chemical / chemistry*
Water Purification / methods

Substances

Acrylic Resins
Herbicides
Hydrogels
Succinates
Water Pollutants, Chemical
Chitin
polyacrylamide
itaconic acid
Atrazine