Sustainable adsorptive removal of high concentration organic contaminants from water using biodegradable Gum-Acacia integrated magnetite nanoparticles hydrogel adsorbent

Muhammad Farooq Khan,Tajamul Hassan,Haidar Abdulkareem Almashhadani,Muhammad Zahid,Mohammed Al-Bahrani,Sharafat Ali,Haron Ahmed,Ahmed Ismail,Nida Gul,Asif Ullah Khan

doi:10.1016/j.inoche.2022.110057

Muhammad Farooq Khan, Tajamul Hassan + Show 8 more

https://doi.org/10.1016/j.inoche.2022.110057

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Abstract

• GA/Fe 3 O 4 composite hydrogel Synthesis via co-precipitation method. • GA/Fe 3 O 4 was characterized by FTIR, XRD, EDX, VSM, SEM, and BET techniques. • Adsorption followed the pseudo second-order kinetic and freundlich isotherm model. • Adsorption reactions are favourable, spontaneous, and exothermic nature. • The composite hydrogel exhibited excellent desorption and recyclability. Release of industrial effluents comprising dyes in water bodies is one of the foremost causes of water pollution. Therefore, the proper and proficient treatment of these dyes contaminated left-over material before their release is crucial. Herein, an eco-friendly biological macromolecule Gum-Acacia (GA) integrated Fe 3 O 4 nanoparticles composite hydrogel was manufactured via co-precipitation technique for effective adsorption of Congo red (CR) dye existing in water bodies. The as-prepared magnetic GA/Fe 3 O 4 composite hydrogel was characterized by FTIR, XRD, EDX, VSM, SEM, and BET techniques. These studies discovered the fruitful fabrication of biodegradable magnetic GA/Fe 3 O 4 composite hydrogel possessing porous structure with large surface area (21.78 m 2 /g) and enough saturated magnetization value (24.5 emu/g) for the efficient elimination of CR. The magnetic GA/Fe 3 O 4 composite hydrogel showed higher adsorption (96.3 %) of CR as compared to pristine Fe 3 O 4 (45 %) in 50 min at pH 6 with 0.02 g of adsorbent and 100 ppm CR. The data obtained from the adsorption of CR over GA/Fe 3 O 4 composite hydrogel have a linear relationship, following the pseudo second-order kinetic model (R 2 = 0.990) and Freundlich adsorption isotherm model (R 2 = 0.983). The evaluated factors of thermodynamic recommended that the experiments were favourable, spontaneous, and exothermic in nature. In addition, the biodegradable magnetic GA/Fe 3 O 4 composite hydrogel also exhibited excellent desorption as well as recyclability owing to its amazing robust magnetic nature. What is more, the GA/Fe 3 O 4 composite hydrogel reserved the same % adsorption proficiency (>96.3 %) up to several repeated rounds, proving its potential applicability for water purgative at domestic plus industrial level.

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