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Abstract
Preparation, characterization and applications of carbon allotropes derived from agricultural wastes By: Hebat-Allah Sarhan Abd-Allah Tohamy
Contamination of water is a worldwide problem for the environment and human health. The ingestion of contaminated water is responsible for more deaths. The high price of GO and CNT as a conventional adsorbent fostered researchers to focus on alternative eco-friendly adsorbents. Agricultural wastes are plentiful and eco-friendly materials. Agricultural wastes can be easily recycled into valuable products and used in the pollutants removal. So, the main objective of this work is to prepare carbon allotropes from different types of agricultural wastes. Thus, this work represents an attempt to overcome some environmental pollutions resulted from agricultural wastes via its treatment to produce carbon allotropes. In the present study, ecofriendly GO were successfully synthesized via a single-step from different agricultural wastes by oxidation under muffled atmosphere conditions. The prepared GO was derived into different modified GO derivatives such as; GSAE disks, GO-EDTA NPs, GO-PEG-CMC hydrogel, MGO, and MGO hydrogel. CNT, as a type of carbon allotropes, was prepared by hydrothermal treatment of raw material followed by pyrolysis of hydrochar products. The synthesized adsorbents were characterized by FT-IR, SEM, EDAX, TEM, magnetic measurements, XRD, Raman spectroscopy, and TGA/DTA. Moreover, this work was undertaken to shed more light on Ni2+ adsorption behavior of the prepared GO, modified GO derivatives, and CNT, to help in understanding the mode of complexation of each ligand (e.g. GO, modified GO derivatives, and CNTs) towards Ni2+. Additionally, the formation of metal complexes in the adsorption process is more useful because M-L