Adsorption of Lead on Gel Combustion Derived Nano ZnO

Venkatesham, V.; Madhu, G. M.; Satyanarayana, S.; Preetham, H.S.

doi:10.1016/j.proeng.2013.01.041

Cited by 38 publications

(19 citation statements)

References 31 publications

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“…ZnO-1NPs were procured from Sigma-Aldrich (particle size <100 nm: purity: 99.5% specific surface area: 15-25 m 2 g −1 ). ZnO-2 NPs were synthesized by the process of gel combustion yielding an average particle size of about 40 nm (SEM) with specific surface area of 80.425 m 2 g −1 (Venkatesham et al, 2013). The hydrodynamic size of the particles after being sonicated (65 kHz, 530 W, 20 min) into Millipore water with the particle concentration of 1 mg/L at 0 h was measured using dynamic light scattering method (90 Plus Particle Size Analyzer, Brookhaven instruments Corporation, USA).…”

Section: Preliminary Characterization Of the Nanoparticlesmentioning

confidence: 99%

Cytotoxicity of ZnO NPs towards fresh water algae Scenedesmus obliquus at low exposure concentrations in UV-C, visible and dark conditions

et al. 2015

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Section: Preliminary Characterization Of the Nanoparticlesmentioning

confidence: 99%

Cytotoxicity of ZnO NPs towards fresh water algae Scenedesmus obliquus at low exposure concentrations in UV-C, visible and dark conditions

et al. 2015

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“…This means, ACS is more suitable than CS for adsorption of Pb(II). Table 5 shows a comparison between the sorption capacities of the adsorbents (CS and ACS) used in this work with other adsorbents reported in literature [8,12,14,[46][47][48][49][50][51][52][53][54][55]. As can be seen from Table 5, ACS has the higher adsorption capacity than that for others, which is the highest capacity in this series.…”

Section: 242mentioning

confidence: 71%

Kinetic and isotherm studies for adsorption of Pb(II) from aqueous solution onto coconut shell activated carbon

El-Deen

2016

Desalination and Water Treatment

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Coconut shell (CS) was used as a neglected agricultural waste to produce the activated carbon through chemical activation process with phosphoric acid (activated coconut shell (ACS)). This process is easy and environmental friendly. The activated carbon (ACS) as biosorbent was evaluated for sorption of lead from wastewater using a series of batch adsorption experiments and compared with pyrolysis CS. The characterization results showed that this biosorbent (ACS) has high surface area and functional groups. The efficiency of adsorption process was studied at various parameters: pH, contact time, initial concentration, and competing ions for the removal of Pb(II) ions from aqueous solution. Adsorption equilibrium data were analyzed by the two parameters models (Langmuir, Freundlich, Temkin, and R-D) and the three parameters models (Generalized, Toth, Radke-Prausnitz, and Fritz-Sclunder models). The adsorption equilibrium data was well described by Langmuir and the monolayer adsorption capacities were found to be 49.92 and 26.14 mg/g onto ACS and CS, respectively, which are agreement with those obtained from the three-parameter isotherm models. The experimental kinetic data were best fitted with Bangham's, Weber-Morris and pseudo-second-order models. The diffusion mechanism was controlled by both boundary layer and pore diffusion for the two adsorbents CS and ACS. It is noteworthy that the effect of Cd(II) and Fe(III) on the adsorption of Pb(II) is very weak, even with high concentration of Cd(II) or Fe(III), which means that the investigated adsorbents have higher affinity for sorption of Pb(II) than that of the other competing ions. The results showed that ACS can be used as a low-cost adsorbent for the removal of Pb(II) ions from aqueous solutions.

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“…The experiments were carried out at different temperatures (293, 303, 313 K) and constant concentration (25 The positive value of ∆H o and entropy (∆S o ) is suggestive of an endothermic nature which is favored and higher randomness of sorption in the system and favors the stability of the at higher temperature. [26].…”

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

“…Also ZnO as an adsorbent, was commonly used for adsorption of lead [25]. Additionally, as far as we know, Sr(II) sorption properties of the nanoparticles ZnO has not been reported so far.…”

Section: Introductionmentioning

confidence: 99%

The Removal of Sr(II) by a Nanoparticles ZnO Prepared by Microwave-Assisted Ignition Reaction

Kaynar¹,

Kaynar²

2017

Celal Bayar Üniversitesi Fen Bilimleri Dergisi

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Adsorptive behavior of nanoparticles ZnO was assessed for removal of Sr(II) in aqueous media in the different trial circumstance such as the effect of parameters (time, pH, concentration of Sr(II) and temperature) on sorption process. The capability of nanoparticles ZnO to remove Sr(II) from aqueous media was followed by a series of adsorption isotherms (Langmuir, Freunlinch and Temkin). The sorption percent and distribution coefficient for nanoparticles ZnO in ideal circumstances are % 96.5 ± 1.76; 6959 mL.g -1 for Sr(II), respectively. According to the Langmuir adsorption model, the maximum adsorption capacity of nanoparticles ZnO for Sr(II) were found to be 1396 mg.g -1 and sorption kinetics was preferable explained by the pseudo-second order equation. Thermodynamic data were identified. The results have been showed that nanoparticles ZnO was appropriate as adsorbent materiel for recovery and sorption of Sr(II) ions from aqueous media. It was found that synthesized ZnO powders had high capacity to recovery Sr(II) of the aqueous media as adsorbent.

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Adsorption of Lead on Gel Combustion Derived Nano ZnO

Cited by 38 publications

References 31 publications

Cytotoxicity of ZnO NPs towards fresh water algae Scenedesmus obliquus at low exposure concentrations in UV-C, visible and dark conditions

Cytotoxicity of ZnO NPs towards fresh water algae Scenedesmus obliquus at low exposure concentrations in UV-C, visible and dark conditions

Kinetic and isotherm studies for adsorption of Pb(II) from aqueous solution onto coconut shell activated carbon

The Removal of Sr(II) by a Nanoparticles ZnO Prepared by Microwave-Assisted Ignition Reaction

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