Adsorption of heavy metal ions from aqueous solutions by amine and carboxylate functionalised bentonites

Anirudhan, T.S.; Jalajamony, S.; Sreekumari, S

doi:10.1016/j.clay.2012.06.005

Cited by 101 publications

(34 citation statements)

References 18 publications

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“…The mass loss of 6.21% (Bent-CTMAB-EDTA) and 4.59% (Bent-CTMAB -MBT) at T¼475 8C due to the loss of organic groups and the loss of structural hydroxyl groups. The TG curves for bentonite and modified bentonite displayed that modified bentonite had a higher hydrophobicity than bentonite (Anirudhan et al, 2012). Compared the dehydroxylation temperature of modified bentonite with unmodified bentonite, the temperature is down, which says that the modifier has been in it (He et al, 2005), and bentonite shows the highest thermal stability.…”

Section: Resultsmentioning

confidence: 99%

Adsorption of Heavy Metal Ions from Aqueous Solutions by Bentonite Nanocomposites

Ma¹,

Su²,

Zhang³

et al. 2016

Water Environment Research

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A series of bentonite nanocomposites have been synthesized by modifying bentonite with hexadecyltrimethylammonium bromide (CTMAB) and the common complexing agents, complexone (ethylene diamine tetraacetic acid, EDTA) or mercaptocomplexant (2-Mercaptobenzothiazole, MBT). These adsorbents are used to remove heavy metal ions (Cu(2+), Zn(2+), Mn(2+),Co(2+)). The Bent-CTMAB-MBT adsorbed metal ions are higher than Bent-CTMAB-EDTA under the same ion concentration in AAS. Compared with the single ion system, the adsorption of the mixed ion system of Cu(2+), Zn(2+), Mn(2+), Co(2+) had decreased differently. In the mixed system, the adsorption of Mn(2+) is significantly lower, but the adsorption of Cu(2+) was highest. The adsorption sequence of these four metal ions was Cu(2+) > Zn(2+) > Co(2+) > Mn(2+), and the selective adsorption was closely related to the hydration energy of heavy metal ions. We could remove more metal ions in different stages with the adsorption sequence.

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Section: Resultsmentioning

confidence: 99%

Adsorption of Heavy Metal Ions from Aqueous Solutions by Bentonite Nanocomposites

Ma¹,

Su²,

Zhang³

et al. 2016

Water Environment Research

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“…As mentioned above, CNTs were first coated with PDA in alkaline solution (Scheme 1). And then polyethylene polyamine (PP) with a number of amine groups was further conjugated with the PDA coating to obtain amine functionalized CNTs through Michael addition reaction [49]. The amine-functionalized CNTs show excellent adsorption efficiency toward Cu 2+ as compared with that of pristine CNTs [50].…”

Section: Introductionmentioning

confidence: 99%

Preparation of amine functionalized carbon nanotubes via a bioinspired strategy and their application in Cu2+ removal

Zhang

Huang

Liu

et al. 2015

Applied Surface Science

321

104

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“…As a comparison with acid‐functionalized bentonite clay, the actual MMT‐MSA was able to remove 74.7‐mg Pb(II)/g after an equilibrium time of ~80 min much lower than 300 min required to remove 123.3 mg Pb(II)/g for carboxylate‐functionalized bentonite …”

Section: Resultsmentioning

confidence: 98%

Reactive and functional clay through UV‐triggered thiol‐ene interfacial click reaction

Msaadi

Gharsalli

Mahouche‐Chergui

et al. 2016

Surface & Interface Analysis

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Clay/mercaptosuccinic acid hybrids were prepared through radical thiol-ene coupling between methacrylate-silanized clay and mercaptosuccinic acid. The clay surface was modified by 3-trimethoxysilylpropylmethacrylate, then mercaptosuccinic acid was clicked by ultraviolet (UV)-triggered thiol-ene addition reaction at 365 nm. Pristine and modified clays were characterized by X-ray diffraction (XRD), attenuated total reflection (ATR) and XPS. The clay/mercaptosuccinic acid material was employed as an adsorbent for the removal of Pb(II) from aqueous solutions. Kinetic studies indicated that the adsorption of Pb(II) followed the pseudo-first-order equation while the Langmuir model fitted the adsorption isotherm. The maximum adsorption was found to be 74.7 mg/g for an equilibrium time of~80 min. UV-triggered thiol-ene reaction is demonstrated to be an easy and elegant pathway for designing reactive and functional clay for environmental and other applications.

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Adsorption of heavy metal ions from aqueous solutions by amine and carboxylate functionalised bentonites

Cited by 101 publications

References 18 publications

Adsorption of Heavy Metal Ions from Aqueous Solutions by Bentonite Nanocomposites

Adsorption of Heavy Metal Ions from Aqueous Solutions by Bentonite Nanocomposites

Preparation of amine functionalized carbon nanotubes via a bioinspired strategy and their application in Cu2+ removal

Reactive and functional clay through UV‐triggered thiol‐ene interfacial click reaction

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