Open AccessPreparation and characterization of activated carbon from wheat straw to remove2, 4-dichlorophenoxy acetic acid from aqueous solutions
Author(s) -
Molla Tefera,
Mengistu Tulu
Publication year - 2021
Publication title -
current chemistry letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.196
H-Index - 5
eISSN - 1927-7296
pISSN - 1927-730X
DOI - 10.5267/j.ccl.2021.1.002
Subject(s) - chemistry , activated carbon , straw , adsorption , aqueous solution , acetic acid , nuclear chemistry , freundlich equation , langmuir , langmuir adsorption model , iodine value , specific surface area , inorganic chemistry , organic chemistry , catalysis
This study was focused to investigate the adsorptive behavior of activated carbon prepared from wheat straw treated with acid and base for the removal of 2, 4-dichlorophenoxy acetic acid (2,4-D). The morphology of the adsorbent was characterized using infrared spectroscopy and scanning electron microscopy. Compared with acid activated wheat straw, base activated wheat straw has provided lower ash content, moisture and volatile matter. However, it has higher iodine number than acid activated wheat straw. The removal of 2,4-D from aqueous solution was investigated at various physicochemical parameters such as pH (2–10), contact time (5–60 min), temperature (20-80 oC), amount of adsorbent (0.1-1.4 g) and initial concentration of 2,4-D (1.0-25 mg/L). The removal efficiency of 2,4-D in aqueous solution was found to be 92.02%. The equilibrium data were analyzed using Langmuir and Freundlich isotherm and the Langmuir model better describes that the active adsorption sites were homogeneously distributed on the surface of the adsorbent. Therefore, the activated carbon prepared from wheat straw treated with base can be used as efficient and cost-effective method to remove 2,4-D from aqueous solution.