Cationic Pollutant Removal from Aqueous Solution Using Reduced Graphene Oxide
Talia Tene,Stefano Bellucci,Marco Vinicio Cortez Guevara,Edwin Viteri,Malvin Arias Polanco,Orlando Salguero,Eder Vera-Guzmán,Sebastián Valladares,Andrea Scarcello,Francesca Alessandro,Lorenzo Caputi,C. Vacacela Gomez +11 more
TL;DR: In this article , the use of reduced graphene oxide (rGO) for the removal of cationic pollutants is explored in detail or is ambiguous, and the results show that rGO exhibits an adsorption capacity of 121.95 mg g−1 for MB and 109.49 mg g −1 for Hg (II) at 298 K.
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Abstract: Reduced graphene oxide (rGO) is one of the most well-known graphene derivatives, which, due to its outstanding physical and chemical properties as well as its oxygen content, has been used for wastewater treatment technologies. Particularly, extra functionalized rGO is widely preferred for treating wastewater containing dyes or heavy metals. Nevertheless, the use of non-extra functionalized (pristine) rGO for the removal of cationic pollutants is not explored in detail or is ambiguous. Herein, pristine rGO—prepared by an eco-friendly protocol—is used for the removal of cationic pollutants from water, i.e., methylene blue (MB) and mercury-(II) (Hg-(II)). This work includes the eco-friendly synthesis process and related spectroscopical and morphological characterization. Most importantly, the investigated rGO shows an adsorption capacity of 121.95 mg g−1 for MB and 109.49 mg g−1 for Hg (II) at 298 K. A record adsorption time of 30 min was found for MB and 20 min for Hg (II) with an efficiency of about 89% and 73%, respectively. The capture of tested cationic pollutants on rGO exhibits a mixed physisorption–chemisorption process. The present work, therefore, presents new findings for cationic pollutant adsorbent materials based on oxidized graphenes, providing a new perspective for removing MB molecules and Hg(II) ions.
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Citations
Removal of heavy metals and dyes from wastewater using graphene oxide-based nanomaterials: A critical review
Mahmoud Adel,Mohamed A. Ahmed,Mohamed A. Elabiad,Ashraf A. Mohamed +3 more
- 01 Jun 2022
TL;DR: Graphene oxide based nanomaterials and their composites are considered as promising adsorbents for the removal of heavy metals, dyes, and other hazardous pollutants from aqueous environments due to its distinctive physicochemical properties, such as chemical stability, huge surface area, high adsorption capacity and recyclability as mentioned in this paper .
92
Adsorptive removal of heavy metals, dyes, and pharmaceuticals: Carbon-based nanomaterials in focus
Abhinay Thakur,Ashish Kumar,Ambrish Singh +2 more
TL;DR: Carbon-based nanomaterials, such as carbon nanotubes and graphene, exhibit exceptional adsorption capabilities for emerging pollutants in wastewater, with a notable 91.71% removal efficiency of Ismate violet 2R dye within 120 minutes, highlighting their potential in water treatment.
59
A comparative study on sorption behavior of graphene oxide and reduced graphene oxide towards methylene blue
Nusrat Jahan,Hridoy Roy,Akter Hossain Reaz,Shasawti Arshi,Ehsanur Rahman,Shakhawat H. Firoz,Md. Shahinoor Islam +6 more
TL;DR: Graphene oxide and reduced graphene oxide (rGO) were synthesized from graphite powder to compare the adsorption capacity of GO and rGO towards a cationic dye-methylene blue (MB) as mentioned in this paper .
53
Removal of mercury(II) from aqueous solution by partially reduced graphene oxide
Talia Tene,Fabian Arias Arias,Marco Vinicio Cortez Guevara,Adriana Nuñez,Luis Villamagua,Carlos Tapia,M. Pisarra,F.J. Torres,Lorenzo Caputi,C. Vacacela Gomez +9 more
TL;DR: In this paper , a partially reduced graphene oxide is proposed as a pristine adsorbent material for Hg(II) removal, which exhibits a high saturation Hg-II uptake capacity of 110.21 mg g −1 , and can effectively reduce the HgII concentration from 150 mg L −1 to concentrations smaller than 40 mg L−1 , with an efficiency of about 75% within 20 min.
Surface Interaction of Tetrabromobisphenol A, Bisphenol A and Phenol with Graphene-based Materials in Water: Adsorption Mechanism and Thermodynamic Effects
TL;DR: In this article , the adsorption kinetics and isotherms were well delineated using pseudo-second-order and Langmuir equations respectively, and the endothermic and spontaneous reaction was observed.
15
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