Adsorption of heavy metal ions by hierarchically structured magnetite-carbonaceous spheres

Gong, Jingming; Wang, Xiaoqing; Shao, Xiulan; Yuan, Shuang; Yang, Chenlin; Hu, Xianluo

doi:10.1016/j.talanta.2012.08.035

Cited by 60 publications

(18 citation statements)

References 43 publications

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“…The values of K f and 1/n is determined from the intercept and slope of linear plot of ln q e versus ln C e , respectively [43,44]. The linear form of Temkin isotherm is presented as follows:…”

Section: Adsorption Equilibrium Studymentioning

confidence: 99%

Sonochemical assisted hydrothermal synthesis of ZnO: Cr nanoparticles loaded activated carbon for simultaneous ultrasound-assisted adsorption of ternary toxic organic dye: Derivative spectrophotometric, optimization, kinetic and isotherm study

Jamshidi

Ghaedi

Dashtian

et al. 2016

Ultrasonics Sonochemistry

117

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Chromium doped zinc oxide nanoparticles (ZnO: Cr-NPs) was synthesized by ultrasonically assisted hydrothermal method and characterized by FE-SEM, XRD and TEM analysis. Subsequently, this composite ultrasonically assisted was deposited on activated carbon (ZnO: Cr-NPs-AC) and used for simultaneous ultrasound-assisted removal of three toxic organic dye namely of malachite green (MG), eosin yellow (EY) and Auramine O (AO). Dyes spectra overlap in mixture (major problem for simultaneous investigation) of this systems was extensively resolved by derivative spectrophotometric method. The magnitude of variables like initial dyes concentration, adsorbent mass and sonication time influence on dyes removal was optimized using small central composite design (CCD) combined with desirability function (DF) approach, while pH was studied by one-a-time approach. The maximized removal percentages at desirability of 0.9740 was set as follow: pH 6.0, 0.019g ZnO: Cr-NPs-AC, 3.9min sonication at 4.5, 4.8 and 4.7mgL(-1) of MG, EY and AO, respectively. Above optimized points lead to achievement of removal percentage of 98.36%, 97.24%, and 99.26% correspond to MG, EY and AO, respectively. ANOVA for each dyes based p-value less than (<0.0001) suggest highly efficiency of CCD model for prediction of data concern to simultaneous removal of these dyes within 95% confidence interval, while their F-value for MG, EY and AO is 935, 800.2, and 551.3, respectively, that confirm low participation of this them in signal. The value of multiple correlation coefficient R(2), adjusted and predicted R(2) for simultaneous removal of MG is 0.9982, 0.9972 and 0.9940, EY is 0.9979, 0.9967 and 0.9930 and for AO is 0.9970, 0.9952 and 0.9939. The adsorption rate well fitted by pseudo second-order and Langmuir model via high, economic and profitable adsorption capacity of 214.0, 189.7 and 211.6mgg(-1) for MG, EY and AO, respectively.

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Section: Adsorption Equilibrium Studymentioning

confidence: 99%

Sonochemical assisted hydrothermal synthesis of ZnO: Cr nanoparticles loaded activated carbon for simultaneous ultrasound-assisted adsorption of ternary toxic organic dye: Derivative spectrophotometric, optimization, kinetic and isotherm study

Jamshidi

Ghaedi

Dashtian

et al. 2016

Ultrasonics Sonochemistry

117

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“…The use of magnetic carbon and its nanocomposites to remove heavy metal ions from water has been reported [93,94]. Jingming Gong et al [94] synthetized a novel hierarchically structured material composed by magnetitecarbonaceous microspheres.…”

Section: Applications In Azo and Antraquinonic Dyes Removalmentioning

confidence: 99%

“…Jingming Gong et al [94] synthetized a novel hierarchically structured material composed by magnetitecarbonaceous microspheres. In this study, the carbon precursor was chitosan, where the as-synthetized precursor of iron oxide-chitosan was transformed in magnetitecarbonaceous microspheres by calcination at elevated temperature.…”

Section: Applications In Azo and Antraquinonic Dyes Removalmentioning

confidence: 99%

Nanosized magnetite in low cost materials for remediation of water polluted with toxic metals, azo- and antraquinonic dyes

Horst

Lassalle

Ferreira

2015

Front. Environ. Sci. Eng.

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Nanosized magnetite has emerged as an adsorbent of pollutants in water remediation. Nanoadsorbents include magnetic iron oxide and its modifiers/ stabilizers, such as carbon, silica, clay, organic moieties (polymers, aminoacids, and fatty acids) and other inorganic oxides. This review is focused on the recent developments on the synthesis and use of magnetic nanoparticles and nanocomposites in the treatment of contaminated water. The emphasis is on the influence of the iron oxide modifiers on some properties of interest such as size, BET area, and magnetization. The characteristics of these nanomaterials are related to their ability to eliminate heavy metal ions and dyes from wastewater. Comparative analysis of the actual literature was performed aiming to present the magnetic material, its preparation methodology and performance in the elimination of the selected pollutants. Vast information has been properly summarized according to the materials, their properties and preferential affinity for selected contaminants. The mechanisms governing nanomaterial's formation as well as the interactions with heavy metals and dyes have been carefully analyzed and associated to their efficiency.

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“…The adsorption treatment has attached much consideration in the past decades due to its cost-effectiveness [13], high efficiency, environmental compatibility and ease of operation [14]. The adsorption efficiency is certainly dependent on the adsorbent properties, and providing an adsorbent, which is industrially viable, cost effective and environmentally comparative, for the removal of metal ions from aqueous solutions seems to be so vital.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Sulfur-Impregnated Carbonaceous Adsorbent from Rice Husk for Heavy Metal Removal from Aqueous Solution

Wajima¹

2018

IJESD

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Adsorption of heavy metal ions by hierarchically structured magnetite-carbonaceous spheres

Cited by 60 publications

References 43 publications

Sonochemical assisted hydrothermal synthesis of ZnO: Cr nanoparticles loaded activated carbon for simultaneous ultrasound-assisted adsorption of ternary toxic organic dye: Derivative spectrophotometric, optimization, kinetic and isotherm study

Sonochemical assisted hydrothermal synthesis of ZnO: Cr nanoparticles loaded activated carbon for simultaneous ultrasound-assisted adsorption of ternary toxic organic dye: Derivative spectrophotometric, optimization, kinetic and isotherm study

Nanosized magnetite in low cost materials for remediation of water polluted with toxic metals, azo- and antraquinonic dyes

Preparation of Sulfur-Impregnated Carbonaceous Adsorbent from Rice Husk for Heavy Metal Removal from Aqueous Solution

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