Facile and economic preparation of graphene hydrothermal nanocomposite from sunflower waste: Kinetics, isotherms and thermodynamics for Cd(II) and Pb(II) removal from water

被引：0

作者：

Ali I. ^{[1
]}

Burakov A.E. ^{[2
]}

Burakova I.V. ^{[2
]}

Kuznetsova T.S. ^{[2
]}

Ananyeva O.A. ^{[2
]}

Badin D.A. ^{[2
]}

Timirgaliev A.N. ^{[2
]}

Dyachkova T.P. ^{[2
]}

Tkachev A.G. ^{[2
]}

Agustiono Kurniawan T. ^{[3
]}

Habila M.A. ^{[4
]}

Imanova G. ^{[5
,6
,7
]}

机构：

[1] Department of Chemistry, Jamia Millia Islamia (Central University), Jamia Nagar, New Delhi

[2] Department of Technology and Methods of Nanoproducts Manufacturing, Tambov State Technical University, Bld. 2, 106/5, Sovetskaya St., Tambov

[3] College of the Environment and Ecology, Xiamen University, Fujian, Xiamen

[4] Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh

[5] Institute of Radiation Problems, Ministry of Science and Education Republic of Azerbaijan, 9 B.Vahabzade Str., Baku

[6] Khazar University, Department of Physics and Electronics, 41 Mahsati Str., Baku

[7] Western Caspian University, Baku

来源：

Journal of Molecular Liquids | 2024年 / 407卷

基金：

俄罗斯科学基金会;

关键词：

Graphene hydrothermal nanocomposite; Kinetics and thermodynamics; Mechanisms of adsorption; Removal of Cd(II) and Pb(II) metal ions from water; Sunflower waste;

D O I：

10.1016/j.molliq.2024.125179

中图分类号：

学科分类号：

摘要：

Keeping the need for good water quality and the demand of climatic issues, the sunflower waste was converted into graphene hydrothermal nanocomposite absorbents for the removal of toxic Cd(II) and Pb(II) metal ions from water. The graphene composite materials were studied by scanning (SEM) and transmission electron microscopy (TEM), XRD analysis, TG and DSC, Raman and IR spectroscopy. According to SEM and TEM analysis, the decarbonized materials had a disordered structure with amorphous carbon with a small pore content. During the carbonization process, the pores space was opened due to the removal of amorphous organic matter and the formation of defects; providing a significant number of meso- and micropores. The prepared graphene composite showed 133.33 and 222.22 mg/g Langmuir adsorption of Cd(II) and Pb(II) at pH 6.0, dose 0.33 g/30 mL, initial concentration 300 mg/L, time 30 min and at 45 °C temperature using hydrothermal nanocomposite HTC/graphene oxide absorbent. The obtained results followed the sorption of heavy metal ions in a mixed-diffusion mode with the contribution of a second-order reaction between the active center of the sorbent and the metal ions. The Temkin and Dubinin-Radushkevich model's parameters and thermodynamic results confirmed endothermic physical interactions among adsorbent and metal ions. This paper is highly useful for managing sunflower waste and purifying water; leading to the present demand for clean water and climatic issues. The production of the effective low-cost nanocomposite using green synthesis technologies (hydrothermal carbonization of raw materials) is highly useful for the removal of Cd(II) and Pb(II) toxic metal ions from water. © 2024 Elsevier B.V.

引用

共 56 条

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