Morus Nigra biomass derived graphene oxide for an efficient removal of toxic pollutants via green synthesis mechanism

초록

Water pollution remains a major global issue, requiring the creation of innovative and sustainable remediation strategies. Our research highlights the potentiality of reduced graphene oxide (rGO) obtained from the ecofriendly synthesis of Black Mulberry (Morus Nigra) leaves and stems for effective water treatment. The produced rGO was characterized using various analytical methods, confirming its structural and functional attributes. Adsorption experiments demonstrated the remarkable effectiveness of green-synthesized rGO in eliminating Congo Red dye and Cr(VI) from aqueous solutions. To improve process conditions, a thorough investigation was carried out to examine the impacts of contact time, initial pollutant concentration, rGO concentration, and pH on adsorption. Various adsorption isotherm models, such as Freundlich, Temkin, and Langmuir, were employed to elucidate the adsorption mechanism, while kinetic models demonstrated pseudosecond-order behavior. The adsorption capacity of Morus Nigra leaf-reduced graphene oxide (MLGO) was found to be exceptionally high, reaching maximum values of 1666.6 f 50.4 mg. g- 1 for Cr(VI) and 1538.4 f 30.6 mg. g- 1 for CR dye. In contrast, Morus Nigra stem-reduced graphene oxide (MSGO) demonstrated moderate adsorption capacities of 1000 f 40.5 mg. g- 1 and 1000 f 20.7 mg. g- 1 for both Cr(VI) and CR dye. These results highlight the effectiveness of Mulberry biomass derived GO as an excellent adsorbent for the removal of Cr(VI) and CR dye from water, contributing to the advancement of sustainable water treatment techniques.

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