Kinetic and adsorption study of Pb (II) toward different treated activated carbons derived from olive cake wastes

Abstract

A B S T R A C TAdsorption capacity of activated carbons (ACs) derived from olive cake toward Pb (II) was tested in batch single ion experimental mode as a function of time, pH, carbon dose, and initial ion concentration. Physicochemical properties were carried out for produced ACs and a commercial Organosorb 10-CO to elucidate the variations of observed results. The total pore volume reached 0.676 cm 3 g −1 for AC2 (activated under forced air); however, AC1 (activated under nitrogen) and Organosorb 10-CO had almost similar total pore volume (0.448 and 0.432 cm 3 g −1 , respectively). The mesopore volume for AC2 was 2.5 and 50 times of AC1 and Organosorb 10-CO, respectively. The scanning electron microscope images reflect the enhancement of thermochemical activation by H 3 PO 4 in increasing the porosity of both ACs. The adsorption of lead ions onto the ACs (confirmed by energy dispersive X-ray) occurred rapidly, since 45 and 48% of lead ions were adsorbed within 30 min onto AC1 and AC2, respectively, in contrast to a limited uptake for Organosorb 10-CO (27%). The q max was achieved within 2 h for AC1 and AC2; however, 3 h was required for Organosorb 10-CO. The tablet form of the commercial AC performs much slower in lead adsorption but established a much higher lead removal percent than the granular form. Langmuir isotherm provided the best fit to the equilibrium data with maximum adsorption capacity of 58.14, 188.67, and 39.84 mg g −1 for AC1, AC2, and Organosorb 10-CO, respectively. The sorption energy (E-value) was 19.36, 8.92, and 11.48 kJ mol −1 for AC1, AC2, and

Effectiveness of activated carbon and Egyptian montmorillonite in the protection against deoxynivalenol-induced cytotoxicity and genotoxicity in rats

“…Moreover, the original cellular morphology of the precursor was lost because a large part of the cellulosic structure has been degraded and extracted from the interior to the exterior of the particle (Marsh and Rodriguez-Reinoso, 2006b;El-Kady et al, 2015). Previous report suggested that the carbon surface chemistry is influenced by the presence of heteroatoms and has a great influence on both electrostatic and non-electrostatic interactions (El-Sayed and Bandosz, 2004).…”

Nanocarbon hybrid for simultaneous removal of arsenic, iron and manganese ions from aqueous solutions

“…The adsorption attained equilibrium in the third stage when the amount of metal ions adsorbed onto the NCH equaled the amount of metal ions desorbing from the NCH. The rapid adsorption at the initial stage is due to the availability of huge number of adsorptive sites (El-Kady et al, 2016;Egbosiuba et al, 2020) and a high external diffusion rate of metal ions (Doulia et al, 2009). Adsorption transfer from extra diffusion to internal diffusion was blamed for the subsequent delayed adsorption in the second stage, while the saturated adsorption stage is due to the electrostatic repulsion between metal ions and the adsorbent, which limits the function of the remaining activated sites (Doulia et al, 2009;Shi et al, 2009).…”

“…From this point of view, we are looking to use nano carbon material to sequester heavy metals from aqueous solution. The adsorption of trace metals in single metal solutions has been extensively studied (Girgis et al, 2009;Ibrahim et al, 2013;El-Kady et al, 2016); however, few publications have been devoted to the studies of simultaneous adsorption of metal ions from aqueous solutions (Bohli et al, 2017;Fang et al, 2018;He et al, 2018;Prelot et al, 2018;Liu et al, 2020). Therefore, the aim of current study is to investigate the ability of nanocarbon hybrid (NCH) to eliminate As, Fe, and Mn from aqueous solution under various conditions (contact time, pH, dose, initial metal concentration).…”

Oil Cakes as Sustainable Agro‐Industrial Feedstock for Biocarbon Materials

“…El‐Kady et al. 109 investigated the impact of the activating agent (H 3 PO 4 ) concentration on the synthesis of olive oil cake‐based activated carbon. They explored two ratios of olive oil cake to H 3 PO 4 , namely, 1:1.75 and 1:3, and found that a higher H 3 PO 4 concentration also increases the specific surface area from 793 to 835 cm 2 g −1 while decreasing the carbon content from 74.79 ± 1.54 % to 71.58 ± 1.32.…”