Layer-by-layer assembly and functionalization of nanobentonite with nanopolyaniline and oleic acid to remove divalent Zn, Co,65Zn, and 60Co from water and radioactive wastewater

Mahmoud, Mohamed E.; Saad, E. A.; El‐Khatib, Ahmed M.; Soliman, Mohamed A.; Allam, Elhassan A.

doi:10.1016/j.ecoenv.2017.07.054

Cited by 13 publications

(8 citation statements)

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“…Referring to the two Eqs. ( 1 ) and ( 2 ), the removal efficiency (%) and the adsorption capacity q t (mg/g) of nano adsorbent (Nano ZnO/MWCNTs) for the dissolved iodine ( 127 I) were calculated 14 , 32 , 33 . where C 0 is the initial concentration of iodine ( 127 I − ) dissolved in deionized water, C t is the residual concentration of iodine ( 127 I − ) after a given contact time (t),V is the volume of solution (100 ml) and m is the mass of the nano adsorbent dose (gram) .…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The residual concentration is (C t ) after a contact time (t) with the optimum dose of nano adsorbent (Nano ZnO/MWCNTs). In this work, the adsorption kinetic of nano adsorbent for iodide ( 127 I − ) from aqueous solutions has been described by the pseudo-first and second-order kinetic models under optimum conditions 14 , 32 , 33 .…”

Section: Kinetics Aspects; Pseudo-first and Second-order Kinetic Modelsmentioning

confidence: 99%

“…The two Eqs. ( 3 ) and ( 4 ) represent linear and nonlinear pseudo-first -order kinetic models respectively 14 , 32 , 33 . …”

Section: Kinetics Aspects; Pseudo-first and Second-order Kinetic Modelsmentioning

confidence: 99%

“…The two Eqs. ( 5 ) and ( 6 ) represent linear and nonlinear pseudo-first -order kinetic models respectively 14 , 32 , 33 . where ( q e and q t ) are the adsorption capacities (mg/g) at equilibrium and time (t), respectively.…”

Section: Kinetics Aspects; Pseudo-first and Second-order Kinetic Modelsmentioning

confidence: 99%

“…Temkin isotherm focuses on the premise that the free energy of sorption is a property of surface coverage. Some papers fit the results of adsorption into linear isotherm models but others fit the results of adsorption into non-linear isotherm models for estimating the isotherm parameters 14 , 32 , 33 .…”

Section: Adsorption Isotherm Analysismentioning

confidence: 99%

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Impact of (nano ZnO/multi-wall CNTs) prepared by arc discharge method on the removal efficiency of stable iodine 127I and radioactive iodine 131I from water

El-Khatib,

Bondouk,

Omar

et al. 2024

Sci Rep

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Radioactive iodine isotopes especially 131I are used for diagnosis and treatment of different types of cancer diseases. Due to the leak of radioactive iodine into the patient’s urine in turn, the wastewater would be contaminated, so it is worth preparing a novel adsorption green material to remove the radioactive iodine from wastewater efficiently. The removal of 127I and 131I contaminants from aqueous solution is a problem of interest. Therefore, this work presents a new study for removing the stable iodine 127I− and radioactive iodine 131I from aqueous solutions by using the novel nano adsorbent (Nano ZnO/MWCNTs) which is synthesized by the arc discharge method. It is an economic method for treating contaminated water from undesired dissolved iodine isotopes. The optimal conditions for maximum removal are (5 mg/100 ml) as optimum dose with shacking (200 rpm) for contact time of (60 min), at (25 °C) in an acidic medium of (pH = 5). After the adsorption process, the solution is filtrated and the residual iodide (127I−) is measured at a maximum UV wavelength absorbance of 225 nm. The maximum adsorption capacity is (15.25 mg/g); therefore the prepared nano adsorbent (Nano ZnO/MWCNTs) is suitable for treating polluted water from low iodide concentrations. The adsorption mechanism of 127I− on to the surface of (Nano ZnO/MWCNTs) is multilayer physical adsorption according to Freundlich isotherm model and obeys the Pseudo-first order kinetic model. According to Temkin isotherm model the adsorption is exothermic. The removal efficiency of Nano ZnO/MWCNTs for stable iodine (127I−) from aqueous solutions has reached 97.23%, 89.75%, and 64.78% in case of initial concentrations; 0.1843 ppm, 0.5014 ppm and 1.0331 ppm, respectively. For the prepared radio iodine (131I−) solution of radioactivity (20 µCi), the dose of nano adsorbent was (10 mg/100 ml) and the contact time was (60 min) at (pH = 5) with shacking (200 rpm) at (25 °C). The filtration process was done by using a syringe filter of a pore size (450 nm) after 2 days to equilibrate. The removal efficiency reached (34.16%) after the first cycle of treatment and the percentage of residual radio iodine was (65.86%). The removal efficiency reached (94.76%) after five cycles of treatment and the percentage of residual radio iodine was (5.24%). This last percentage was less than (42.15%) which produces due to the natural decay during 10 days.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Kinetics Aspects; Pseudo-first and Second-order Kinetic Modelsmentioning

confidence: 99%

“…The two Eqs. ( 3 ) and ( 4 ) represent linear and nonlinear pseudo-first -order kinetic models respectively 14 , 32 , 33 . …”

Section: Kinetics Aspects; Pseudo-first and Second-order Kinetic Modelsmentioning

confidence: 99%

Section: Kinetics Aspects; Pseudo-first and Second-order Kinetic Modelsmentioning

confidence: 99%

Section: Adsorption Isotherm Analysismentioning

confidence: 99%

See 3 more Smart Citations

Impact of (nano ZnO/multi-wall CNTs) prepared by arc discharge method on the removal efficiency of stable iodine 127I and radioactive iodine 131I from water

El-Khatib,

Bondouk,

Omar

et al. 2024

Sci Rep

Self Cite

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Investigation of Adsorption Optimization, Kinetic and Isotherm Behaviors of 60Co and 152+154Eu Radioisotopes from Nuclear Radioactive Wastewater onto a Novel Co0.5Ni0.5O–Co2Mo3O8–CuO–ZnO Perovskite Metal Oxides Nanosorbent

Allam,

Ghamry,

Gizawy

et al. 2024

J Inorg Organomet Polym

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Herein in this study, a new nanosorbent consisted of perovskite cobalt–nickel oxide Co0.5Ni0.5O and perovskite cobalt–molybdenum oxide Co2Mo3O8, copper oxide CuO, and zinc oxide ZnO, has been synthesized. The structural and morphological properties of the nanosorbent were established by using FT-IR, PXRD, TGA, HR-TEM, SEM, and EDX. The nanosorbent was implemented to adsorb 60Co and 152+154Eu radioactive isotopes under diverse conditions using different pH values, contact times, radioactive nuclides concentrations, and temperatures. The highest adsorption removal for both radionuclides was obtained at pH 6.0 as 83.65 and 122.50 mg/g for 60Co(II), and 152+154Eu(III), respectively. The adsorption models for 60Co(II) were fitted with Temkin only, on the other hand, the adsorption of 152+154Eu(III) was fitted with four adsorption models. The kinetics for 60Co(II) were fitted with the Pseudo first order (PFO), Pseudo second order (PSO), and Intraparticle models on the other hand 152+154Eu(III) were found to agree with the Pseudo first order (PFO) and intraparticle models.

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Intercalation of Nanopolyaniline with Nanobentonite and Manganese Oxide Nanoparticles as a Novel Nanocomposite to Remediate Cobalt/Zinc and Their Radioactive Nuclides 60Co/65Zn

et al. 2019

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Layer-by-layer assembly and functionalization of nanobentonite with nanopolyaniline and oleic acid to remove divalent Zn, Co,65Zn, and 60Co from water and radioactive wastewater

Cited by 13 publications

References 50 publications

Impact of (nano ZnO/multi-wall CNTs) prepared by arc discharge method on the removal efficiency of stable iodine 127I and radioactive iodine 131I from water

Impact of (nano ZnO/multi-wall CNTs) prepared by arc discharge method on the removal efficiency of stable iodine 127I and radioactive iodine 131I from water

Investigation of Adsorption Optimization, Kinetic and Isotherm Behaviors of 60Co and 152+154Eu Radioisotopes from Nuclear Radioactive Wastewater onto a Novel Co0.5Ni0.5O–Co2Mo3O8–CuO–ZnO Perovskite Metal Oxides Nanosorbent

Intercalation of Nanopolyaniline with Nanobentonite and Manganese Oxide Nanoparticles as a Novel Nanocomposite to Remediate Cobalt/Zinc and Their Radioactive Nuclides 60Co/65Zn

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