Preparation of activated carbon from Zilla spinosa biomass by means of microwave for efficient bio-sorption of hazardous methylene blue colorant from water
Chayma Jlassi, Mahjoub Jabli, Hassen Agougui, Saber Ben Abdessalem
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引用次数: 0
Abstract
Biochars and their activated carbons derived from sustainable materials constitute an extensive use in adsorbing several hazardous substances due to their excellent characteristics and their high efficiencies. In this work, an economic and prompt method was adopted to prepare activated carbon from low-cost, abundant, and sustainable ligno-cellulosic Zilla spinosa fruits chemically activated with zinc chloride (ZnCl2) in a laboratory microwave apparatus. The experiments were carried out at different mixing ratios (1:1, 2:1, and 1:2), microwave power (580 W, 640 W, and 720 W), and microwave time (60, 90, 120, 180, and 240 s). The obtained activated carbon was analyzed using a number of techniques which include Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), Brunauer–Emmett–Teller (BET) surface area, X-ray fluorescence (XRF), X-ray diffraction (XRD), and thermogravimetric-differential thermal analysis (TGA-DTA). The optimal conditions for the design of activated carbon with the maximum adsorption ability of methylene blue (390 mg/g) were as follows: carbonization temperature of microwave power = 640 w, radiation time = 180 s, Zilla to ZnCl2 ratio of 2:1. The dye uptake mechanism fulfilled first-order kinetic and Freundlich models. Overall, it has been proven that the prepared activated carbons, due to simplicity of synthesis and ease of recuperation from solution, could be proficiently used for water purification systems.
期刊介绍:
Biomass Conversion and Biorefinery presents articles and information on research, development and applications in thermo-chemical conversion; physico-chemical conversion and bio-chemical conversion, including all necessary steps for the provision and preparation of the biomass as well as all possible downstream processing steps for the environmentally sound and economically viable provision of energy and chemical products.