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Bouzidi Abdelkader Imessaoudene Djillali Ararem Abderrahmane Aissaoui Regadia 《Journal of Radioanalytical and Nuclear Chemistry》2019,319(1):409-418
Four types of undisturbed soils around the Es-Salam reactor (Algeria) were used to evaluate the sorption behavior of strontium. The batch study was carried out under different experimental conditions. The kinetics were well fited by pseudosecond order model. Soils’s activation energies were 12.37, 14.76, 15.5 and 16.17 kJ mol−1, corresponding to ion-exchange-type sorption. Sorption was exothermic (ΔH° < 0), spontaneous (ΔG° < 0) and favorable at low temperature. Competing cations, particularly Ca2+ reduce the Sr adsorption. Desorption reaction showed a higher value of Sr in the easily extractible phase indicating a relative availability of the element.
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Imessaoudene Djillali Bensacia Nabila Chenoufi Fatima 《Journal of Radioanalytical and Nuclear Chemistry》2020,324(3):1245-1253
Journal of Radioanalytical and Nuclear Chemistry - The removal of Co2+ in aqueous solution by spent green tealeaves (SGTL) was studied in batch conditions. The bio-sorbent was characterized by the... 相似文献
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Djillali Imessaoudene Salah Hanini Abdelkader Bouzidi 《Journal of Radioanalytical and Nuclear Chemistry》2013,298(2):893-902
A set of experiments was carried out to evaluate the strontium uptake potential of spent coffee grounds (SCG) by batch tests in aqueous medium. Adsorption of Sr2+ as a function of contact time and adsorbent dose, pH, particles size, agitation speed, temperature and co-ions presence was investigated. Obtained results revealed that the maximum adsorption took place at pH range of 5–8 and temperature values between 283 and 333 K. Particles size effect was not very significant and agitation speed influenced on the equilibrium time. Competitive adsorption experiments allowed us to classify the negative effect on the Sr2+ uptake according to this order Al3+ ? Co2+ > Mg2+ > Ca2+ ? Na+ > K+ > Cs+. Kinetic study indicated that the Sr2+ uptake was fast and it was well fitted by the pseudo second order reaction model. Adsorption isotherm was well interpreted by Langmuir model. The maximum adsorption capacity was found to be 69.01 mg g?1 at pH 7, 293 K, particles sizes = 200–400 μm and agitation speed 250 rpm. The thermodynamic study revealed that the process was spontaneous (ΔG 0 < 0), exothermic (ΔH 0 < 0) with a raised affinity for Sr2+ (ΔG 0 < 0, ΔS 0 > 0) and occurred by physical adsorption (E a = 8.37 kJ mol?1). FTIR analysis showed carboxylic acid and amino group presence on SCG surface playing a vital role in Sr2+ biosorption. 相似文献
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