Removal of Zn (II) and Cu (II) Ions from Industrial Wastewaters Using Magnetic Biochar Derived from Water Hyacinth
| Autor: | Upenyu Guyo, Benias C. Nyamunda, Terrence Chivhanga, Fidelis Chigondo |
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| Rok vydání: | 2019 |
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Article Subject
Coprecipitation General Chemical Engineering 02 engineering and technology 010501 environmental sciences 01 natural sciences Industrial and Manufacturing Engineering symbols.namesake Adsorption Biochar Electrical and Electronic Engineering Fourier transform infrared spectroscopy 0105 earth and related environmental sciences Civil and Structural Engineering Aqueous solution Chemistry Mechanical Engineering Langmuir adsorption model Sorption 021001 nanoscience & nanotechnology lcsh:TA1-2040 Hardware and Architecture symbols lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology Pyrolysis Nuclear chemistry |
| Zdroj: | Journal of Engineering, Vol 2019 (2019) |
| ISSN: | 2314-4912 2314-4904 |
| DOI: | 10.1155/2019/5656983 |
| Popis: | This study evaluates the effectiveness of magnetic biochar (Fe2O3-EC) derived from water hyacinth in the removal of Cu+2 and Zn+2 from aqueous solution. Fe2O3-EC was prepared by chemical coprecipitation of a mixture of FeCl2 and FeCl3 on water hyacinth biomass followed by pyrolysis. The adsorbent was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDX). Batch adsorption studies on the effects of temperature, biosorbent dosage, contact time, and initial metal ion concentration were carried out. Fe2O3-EC exhibited optimum contact time, biosorbent dosage, and pH values of 65 min, 1.2 g, and 6, respectively. Fe2O3-EC exhibited strong magnetic separation ability and high sorption capability. Metal ion adsorption onto the biochar conformed to the Langmuir isotherm. Kinetic studies revealed that the adsorption process followed pseudo-second-order model. The calculated thermodynamic parameters showed that the adsorption process was feasible and exothermic in nature. These results have demonstrated that the use of Fe2O3-EC in metal ion removal could provide an alternative way to manage and utilize this highly problematic invasive species. |
| Databáze: | OpenAIRE |
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