OPAC (orange peel activated carbon) derived from waste orange peel for the adsorption of chlorophenoxyacetic acid herbicides from water: Adsorption isotherm, kinetic modelling and thermodynamic studies
| Autor: | Subramanyan Vasudevan, Aarthi Pandiarajan, Ramakrishnan Kamaraj, Sudharshan Vasudevan |
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| Rok vydání: | 2018 |
| Předmět: |
Langmuir
Environmental Engineering Bioengineering Portable water purification 02 engineering and technology Orange (colour) 010501 environmental sciences 01 natural sciences Water Purification symbols.namesake Adsorption medicine Waste Management and Disposal 0105 earth and related environmental sciences Herbicides Renewable Energy Sustainability and the Environment Chemistry Water Langmuir adsorption model General Medicine Hydrogen-Ion Concentration 021001 nanoscience & nanotechnology Carbon Kinetics symbols Thermodynamics 0210 nano-technology Pyrolysis Water Pollutants Chemical Citrus × sinensis Citrus sinensis Nuclear chemistry Activated carbon medicine.drug |
| Zdroj: | Bioresource Technology. 261:329-341 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2018.04.005 |
| Popis: | This study presents the orange peel activated carbon (OPAC), derived from biowaste precursor (orange peel) by single step pyrolysis method and its application for the adsorption of chlorophenoxyacetic acid herbicides from the water. The OPAC exhibited the surface area of 592.471 m2 g−1, pore volume and pore diameter of 0.242 cc g−1 and 1.301 nm respectively. The adsorption kinetics and thermodynamic equilibrium modelling for all chlorophenoxyacetic acid herbicides were investigated. The various parametric effects such as pH and temperature were evaluated. A pseudo-second-order kinetic model was well fitted for all the herbicides. The Langmuir isotherm was obeyed for all the herbicides and the maximum Langmuir capacity of 574.71 mg g−1 was achieved. The thermodynamic studies revealed that the adsorption increases with increase in temperature. The results shows that the orange peel derived carbon (OPAC) as effective and efficient adsorbent material for the removal of chlorophenoxyacid herbicides from the water. |
| Databáze: | OpenAIRE |
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