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El-Masry Eman H. Mohamed Tarek M. Metwally Sayed S. 《Environmental science and pollution research international》2023,30(5):11661-11674
Environmental Science and Pollution Research - The scientific impact of this work is the protection of the environment from hazardous pollutants. Gamma irradiation was employed for the preparation... 相似文献
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Amira A. Mohammed Ola A. Abdel Moamen Sayed S. Metwally Ahmed M. El-Kamash Ibrahim Ashour Mohammed S. Al-Geundi 《Environmental science and pollution research international》2020,27(7):6824-6836
Radionuclide sorption by natural and modified clays is extensively accepted to be an important process from the radioactive waste point of view. This work focused on modification of natural attapulgite with a layered double hydroxide to produce a novel chemisorbent for Sr2+, Ni2+, and Co2+ removal from multicomponent solution. The structural and surface characteristics of both attapulgite (ATP) and modified attapulgite (LDH-ATP) were investigated using XRD, FTIR, SEM, and thermal analysis. Comparison of sorption features of Sr2+, Ni2+, and Co2+ onto ATP and LDH-ATP was achieved; the results indicated that LDH-ATP was the most efficient sorbent for Sr2+, Ni2+, and Co2+. Kinetic studies established that the sorption is fast and reaching >90% within 30 min. The sorption of Sr2+, Ni2+, and Co2+ are well defined by non-linear pseudo-second-order model and controlled by an intra-particle diffusion mechanism. The diffusivity was determined using homogeneous surface diffusion (HSDM) model and found in the order 10−13 m2/min; this confirmed that the sorption of the three ions is chemisorption process. LDH-ATP can be employed as a candidate chemisorbent for the removal of some metal ions from waste solution. 相似文献
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