Adsorption of Hg2+ from aqueous solution onto polyacrylamide/attapulgite

Zhao, Yijiang; Chen, Yan; Li, Meisheng; Zhou, Shouyong; Xue, Ailian; Xing, Weihong

doi:10.1016/j.jhazmat.2009.06.048

Cited by 116 publications

(34 citation statements)

References 37 publications

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“…The value of R L indicates the nature of the sorption process to be either unfavorable (Zhao et al 2009). The Freundlich model is as follows (Sheikhhosseini et al 2013):…”

Section: Discussionmentioning

confidence: 99%

“…The absorption bands related to bending vibrations of Si-O-Si and Si-O-Al occurred at 469.6 and 520.7 cm -1 , respectively (Zohra et al 2008), but the position of the bands was slightly changed to lower wave numbers after modification of bentonite with CTA surfactant (Table 1). The absorption peak at 1,671.9 cm -1 in the spectrum of the nanocomposite was attributed to the C=O stretching vibrations of the COOH group (Zhao et al 2009;Mahmoud et al 2011), indicating successful grafting of PAA on the surface of the CTA-Bent.…”

Section: Xrd Patternsmentioning

confidence: 98%

“…However, it has some disadvantages including high cost, problems of regeneration, and difficulties of separation from wastewater (Wang et al 2009a, b;Zhang et al 2007). Recently, much attention has been paid to clay minerals such as bentonite (Zhao et al 2010;Ulusoy and Simsek 2005;Futalan et al 2011), attapulgite (Wang et al 2009a, b;Chen and Wang 2009;Zhao et al 2009), kaolinite (Unuabonah et al 2008a, b) and zeolite (Ulusoy and Simsek 2005) as low-cost adsorbents with high specific surface area, chemical and mechanical stability, and high cation exchange capacities (CEC). Colloidal dispersions of clays, however, can cause some difficulties hindering water flow (Keren and Ben-Hur 2003).…”

Section: Introductionmentioning

confidence: 99%

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Removal of lead from aqueous solutions by a poly(acrylic acid)/bentonite nanocomposite

2014

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We synthesized a novel poly acrylic acid-organobentonite (PAA-Bent) nanocomposite by successive intercalation of cetyltrimethylammonium (CTA) surfactant and polyacrylic acid (PAA) into the bentonite (Bent) interlayer spaces. The surfactant-modified clay (CTABent) and PAA-Bent nanocomposite were characterized by XRD and FT-IR techniques and used for removal of Pb(II) from aqueous solution. The XRD results confirmed the intercalation of CTA and PAA into the interlayer spaces of the bentonite increasing the d 001 spacing of the clay from 12.2 up to 38.9 Å . FT-IR analysis of the modified clay samples revealed the functional groups of CTA and PAA constituents alighted on the bentonite surfaces. Maximum Pb sorption capacity of the Bent and PAA-Bent predicted by Langmuir model were 52.3 and 93.0 mg g -1 , respectively, showing that the synthesized nanocomposite superiorly adsorbed Pb from the solution as compared to the Bent. The maximum Pb removal efficiency of 99.6 % was achieved by the nanocomposite at 25°C with \30 min contact time for a 7.5 g L -1 solid-to-liquid ratio and an initial metal concentration of 400 mg L -1 . The results indicated that PAA-Bent nanocomposite can be efficiently used as a superadsorbent for the removal of Pb(II) from aqueous solution.

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“…The value of R L indicates the nature of the sorption process to be either unfavorable (Zhao et al 2009). The Freundlich model is as follows (Sheikhhosseini et al 2013):…”

Section: Discussionmentioning

confidence: 99%

Section: Xrd Patternsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Removal of lead from aqueous solutions by a poly(acrylic acid)/bentonite nanocomposite

2014

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“…The band at 1,637.2 cm −1 is related to the bending vibration of hydroxyl groups from water molecules [40,41]. FT-IR spectrum of PAA shows stretching vibrations of C=O group (carboxyl or carbonyl) at 1,647.8 cm −1 [42,43]. This characteristic band was shifted to higher frequencies (1,671.9 cm −1 ) after the polymer was combined with the clay which can be related to the interactions between the C=O groups and the clay surfaces [44].…”

Section: Sorbents Characteristicsmentioning

confidence: 99%

Kinetics and thermodynamics of Pb sorption onto bentonite and poly(acrylic acid)/bentonite hybrid sorbent

Rafiei

Shirvani

Ogunseitan

2016

Desalination and Water Treatment

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“…Attapulgite (ATP) is a hydrated magnesium aluminum silicate presented in nature as fibrillar mineral [9][10][11] , which has being widely applied in wastewater treatment for its unique fibrous crystal structure and superior colloidal, adsorption properties. Meanwhile, ATP is an ideal carrier for catalysts because of its large specific surface and good suspension property.…”

Section: Introductionmentioning

confidence: 99%

Study on Preparation of ZnO/a-Fe2O3/Attapulgite Nanocomposites and Degradation of Methyl Orange

Wang¹,

Pan²,

Jia³

et al. 2018

dteees

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Abstract. The photocatalytic composites of nano ZnO/α-Fe 2 O 3 /ATP were prepared by coprecipitation and hydrothermal reaction and then were applied to degrade simulated wastewater of methyl orange, which showed that the degradation rate of methyl orange reached 85.3% under UV light. The degradation reaction of methyl orange was consistent with first-order kinetic equation with k=0.456/h proving that the composite materials had efficient photocatalytic activity and excellent decolorization rate.

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Adsorption of Hg2+ from aqueous solution onto polyacrylamide/attapulgite

Cited by 116 publications

References 37 publications

Removal of lead from aqueous solutions by a poly(acrylic acid)/bentonite nanocomposite

Removal of lead from aqueous solutions by a poly(acrylic acid)/bentonite nanocomposite

Kinetics and thermodynamics of Pb sorption onto bentonite and poly(acrylic acid)/bentonite hybrid sorbent

Study on Preparation of ZnO/a-Fe2O3/Attapulgite Nanocomposites and Degradation of Methyl Orange

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