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Title
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Removal of Zn (II) and Cu (II) Ions from Industrial Wastewaters Using Magnetic Biochar Derived from Water Hyacinth
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Creator
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Nyamunda Benias C
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Chivhanga Terrence
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Guyo Upenyu
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Chigondo Fidelis
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Abstract
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This study evaluates the effectiveness of magnetic biochar (Fe2O3-EC) derived from water hyacinth in the removal of Cu+2 andZn+2 from aqueous solution. Fe2O3-EC was prepared by chemical coprecipitation of a mixture of FeCl2 and FeCl3 on waterhyacinth biomass followed by pyrolysis. The adsorbent was characterized by Fourier transform infrared spectroscopy (FTIR) andscanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDX). Batch adsorption studies on the effects oftemperature, biosorbent dosage, contact time, and initial metal ion concentration were carried out. Fe2O3-EC exhibited optimumcontact time, biosorbent dosage, and pH values of 65 min, 1.2 g, and 6, respectively. Fe2O3-EC exhibited strong magnetic separationability and high sorption capability. Metal ion adsorption onto the biochar conformed to the Langmuir isotherm. Kinetic studiesrevealed that the adsorption process followed pseudo-second-order model. The calculated thermodynamic parameters showed thatthe adsorption process was feasible and exothermic in nature. These results have demonstrated that the use of Fe2O3-EC in metalion removal could provide an alternative way to manage and utilize this highly problematic invasive species
Keywords: Magnetic biochar, Water hyacinth, Heavy metal adsorption, Langmuir isotherm, Pseudo-second-orde
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Date
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2019
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Source
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Journal of Engineering
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identifier
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doi.org/10.1155/2019/5656983
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volume
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2019
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issue
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1
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pages
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11
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issn
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2314-4912
