Adsorption of Phenolic Compounds and Methylene Blue onto Activated Carbon Prepared from Date Fruit Pits

Abstract

Activated carbon has been prepared from date fruit pits. The carbon, prepared at different burn‐off rates, showed a high uptake of methylene blue. At 92 % burn‐off (weight loss percent of the carbonized pits upon activation), methylene blue uptake was 590 mg/g. With this high capacity, the carbon was then used to study the adsorption of phenol, 2‐nitrophenol, 2,4‐dinitrophenol, and 2,4,6‐trinitrophenol. The prepared activated carbon showed an adsorption capacity better than that of many activated carbons in current use. The experimental adsorption data for the single components were regressed using both Langmuir and Freundlich isotherm models and the fit was generally satisfactory. The experimental adsorption data of the binary system phenol‐2‐nitrophenol were compared with the predicted results using two predictive models: the generalized Langmuir and the IAS models. The data were better represented by the IAS theory than the generalized Langmuir model even though the fit of the experimental data was not adequate.

Preparation and characterization of activated carbon from date stones by physical activation with steam

“…Activated carbons can be prepared from many organic materials having a high carbon content like wood [4,5], coal [6], lignite [7] and coconut shells [8][9][10]. In the recent years, many other agricultural by-products have been used as sources for activated carbons production such as cherry stones [11,12], olive stones [13][14][15][16][17][18], oil palm stones [19][20][21], apricot stones [22,23], almond shells [24], sugar cane bagasse [25,26], walnut shells [13], pecan shells [27][28][29], cotton stalks [30] and date stones [31][32][33][34][35]. World production of dates was approximately 6.7 million tonnes in 2004.…”

Surface charge properties of Fe2O3 in aqueous and alcoholic mixed solvents

“…Metal oxides/hydrous oxides are naturally occurring discrete minerals or in the form of coatings on other particles and exist in various amorphous and crystalline forms [1][2][3][4][5]. In aqueous suspensions they develop surface electrical charges from the dissociation of the surface hydroxyl groups and complexation of the background electrolyte ions.…”

Preparation and characterization of an activated carbon from a date stones variety by physical activation with carbon dioxide

“…Activated carbons can be prepared from many organic materials having high carbon content like wood [5,6], coal [7], lignite [8] and coconut shells [9][10][11]. In the recent years, many other agricultural by-products have been used as sources for activated carbons production such as cherry stones [12,13], olive stones [14][15][16][17][18][19], oil palm stones [20][21][22], apricot stones [23,24], almond shells [25], sugar cane bagasse [26,27], walnut shells [14], pecan shells [28][29][30], cotton stalks [31] and date stones [32][33][34][35][36][37][38][39][40][41].…”