Adsorption of vanadium (V) on natural kaolinite and montmorillonite: Characteristics and mechanism

Zhu, Huiwen; Xiao, Xiyuan; Guo, Zhaohui; Han, Xiaoqing; Liang, Yuqin; Zhang, Yong; Zhou, Cong

doi:10.1016/j.clay.2018.04.035

Cited by 94 publications

(39 citation statements)

References 39 publications

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“…A comparison with other adsorbents indicated a high metal ion adsorption capacity of nano platelets kaolinite. Present study results are in line with previous studies (Abukhadra et al, 2019;Amer and Awwad, 2018;Chen et al, 2019;Fatimah, 2018;He et al, 2019;Kuang et al, 2019;Ma et al, 2019;Nabbou et al, 2019;Ruyter-Hooley et al, 2017;Zhu et al, 2018) that kaolinite could be a potential adsorbent for the pollutants of environmental concern.…”

Section: Comparison Of Platelets Nano Kaolinite With Other Kaolin Adssupporting

confidence: 93%

Nano platelets kaolinite for the adsorption of toxic metal ions in the environment

Int¹

2019

Preprint

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Contamination of water reservoirs with different toxic metal ions from industrial activities has emerged as one of major issues in recent years. The adsorption of Pb(II) ions from aqueous solution onto Nano platelets kaolinite has been investigated. The adsorption studies were determined as a function of pH, contact time, initial metal ion concentration, adsorbent dosage and temperature. Nano platelets kaolinite prepared from raw Jordanian kaolin clay showed size in the range of 12-80 nm. Maximum adsorption capacity as determined by Langmuir isotherm model is 175.44 mg/g for Pb(II). Thermodynamic parameters, ΔGo, ΔHo and ΔSo were revealed that the adsorption process is spontaneous and endothermic process. The results showed that Nano platelets kaolinite can be efficiently used as a low-cost alternative and eco-friendly adsorbent for the removal of toxic heavy metals from wastewater.

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Section: Comparison Of Platelets Nano Kaolinite With Other Kaolin Adssupporting

confidence: 93%

Nano platelets kaolinite for the adsorption of toxic metal ions in the environment

Int¹

2019

Preprint

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“…Therefore, natural and modified clays as adsorbents for the removal of heavy metals has aroused great attention. Clays, such as kaolinite, montmorillonite, vermiculite, hydrotalcite and so on, are used as adsorbents for the removal of heavy metal ions from water. Among these clays, hydrotalcite (LDHs) has attracted attention in the removal of heavy metal because of their singular structural characteristics and properties.…”

Section: Introductionmentioning

confidence: 99%

L–Cysteine/Hydrotalcite Hybrid for Collaborative Removal of Cu(II), Hg(II) and Pb(II) Ions from Aqueous Solutions: Different Metal Ions Require Different Mechanisms

Luo

Chen

et al. 2020

ChemistrySelect

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The L-cysteine/hydrotalcite hybrid has been synthesized by incorporating L-cysteine anion into the interlayer of hydrotalcite. The sample is purposed for the removal of Cu 2 + , Pb 2 + and Hg 2 + from aqueous solutions. The structure and morphology of L-cysteine/hydrotalcite are characterized by XRD, FTIR, SEM and BET. The effects of various physic-chemical factors such as pH, adsorbent dosage and contact time are investigated. The maximum adsorption capacities of L-cysteine/ hydrotalcite for Cu 2 + , Pb 2 + and Hg 2 + are 157.99, 81.24 and 215.90 mg/g, respectively, which are obviously higher than those of the pristine hydrotalcite. The adsorption kinetics are fitted by the pseudo-second order model. The adsorption isotherms are well described by the Langmuir equation. As confirmed by XRD and XPS analysis, a mechanism for adsorbed Cu 2 + in the form of coordinated complexes and isomorphous substitution is proposed. In contrast, a precipitation mechanism is suggested for adsorbed Hg 2 + and Pb 2 + . The results demonstrate that L-cysteine/hydrotalcite is a promising adsorbents for efficient elimination toxic metal ions from wastewater.

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“…Research involving adsorption of heavy metals have been performed to evaluate the efficiency of the adsorptive capacity of soils. Some researchers have determined that characteristics such as organic matter and iron oxides have good correlation with the adsorptive capacity of metals in soil (SILVEIRA et al, 2002), which depends on the variation of pH in the medium (ZHU et al, 2018). Regarding sanitary landfills, recent studies have been developed aiming to improve the behavior of liners and mitigate the negative environmental impacts, such as hydric contamination (MOHAMMED et al, 2016;BURAGOHAIN et al, 2018;BUDIHARDJO, 2018;SOBTI and SINGH 2019).…”

Section: Introductionmentioning

confidence: 99%

Correlations between physico-chemical properties and nickel adsorption parameters in soils used in sanitary landfill liners

Silva

Costa²,

Paiva³

et al. 2020

R. Águas Subter.

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A adsorção de metais pesados por liners de aterros sanitários representa mais uma medida de proteção às águas subterrâneas e superficiais contra a contaminação por metais, amenizando os riscos à saúde pública. O objetivo deste trabalho foi identificar, a partir de correlações, a influência de propriedades físico-químicas de solos utilizados em liners de aterros sanitários com parâmetros de adsorção do níquel. Os solos de estudo, areia argilosa e argila bentonítica, foram submetidos a ensaios de equilíbrio em lote individualmente e em misturas, com solução contaminante de níquel de 45 a 1440 mg.L-1. Os parâmetros de adsorção do níquel foram obtidos pelos modelos de isotermas de Langmuir e Freundlich, apresentando melhor ajuste pelos critérios de R² e REQM no de Freundlich. Constatou-se melhor adsorção ao níquel à medida em que a argila bentonítica foi adicionada às misturas, sendo a capacidade de troca catiônica (CTC) a propriedade que mais influenciou na retenção do metal.

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Adsorption of vanadium (V) on natural kaolinite and montmorillonite: Characteristics and mechanism

Cited by 94 publications

References 39 publications

Nano platelets kaolinite for the adsorption of toxic metal ions in the environment

Nano platelets kaolinite for the adsorption of toxic metal ions in the environment

L–Cysteine/Hydrotalcite Hybrid for Collaborative Removal of Cu(II), Hg(II) and Pb(II) Ions from Aqueous Solutions: Different Metal Ions Require Different Mechanisms

Correlations between physico-chemical properties and nickel adsorption parameters in soils used in sanitary landfill liners

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