The adsorption ability of Cr(VI) on sawdust–polyaniline nanocomposite

Phan, Thi Binh; Que, Ngoc; Thuy, Thi Thanh

doi:10.1088/2043-6262/1/3/035006

Cited by 4 publications

(4 citation statements)

References 7 publications

(7 reference statements)

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“…Li et al (2014) utilized PANI synthesized on filter paper with a porous structure to remove metal ions or low molecular weight materials, and Cr(Ⅵ) removal by this composite was effective under high temperature and low pH conditions. Mansour et al (2011) and Phan et al (2010) used a PANI coating on sawdust to remove Cd(Ⅱ) and Cr(Ⅵ). Phan et al (2010) reported that the Cr(Ⅵ) adsorption of the composite was affected by pH, and the adsorption rate was fastest during the first half hour.…”

Section: Introductionmentioning

confidence: 99%

“…Mansour et al (2011) and Phan et al (2010) used a PANI coating on sawdust to remove Cd(Ⅱ) and Cr(Ⅵ). Phan et al (2010) reported that the Cr(Ⅵ) adsorption of the composite was affected by pH, and the adsorption rate was fastest during the first half hour. The functional groups in PANI have been reported to have a strong affinity for heavy metals such as Cr(Ⅵ) (Eisazadeh 2007;Zhang et al 2010;Bhaumik et al 2012;Krishnani et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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Preparation of a lignin/polyaniline composite and its application in Cr(VI) removal from aqueous solutions

Seo

Choi

Bae

et al. 2019

BioRes

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Lignin/polyaniline composites were prepared by adding kraft lignin for the synthesis of polyaniline (PANI), a typical conductive polymer. The composites were utilized as an adsorbent for the removal of hexavalent chromium (Cr(VI)). When lignin alone was used as an adsorbent, the removal efficiency of Cr was low. However, when the lignin/PANI composite was used, lignin and PANI adsorbed Cr(III) together. The PANI reduced Cr(VI), which resulted in the efficient removal of Cr. In addition, as the dosage of the lignin/PANI composite decreased as an adsorbent, the Cr removal efficiency of the composite decreased considerably compared with pure PANI. However, the composite with a lignin-to-PANI ratio of 1:1 showed a Cr removal efficiency similar to that of pure PANI. The morphology of the lignin/PANI composite was observed to synthesize PANI around the lignin surface. Both Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses showed that an interaction between the carbonyl groups of lignin and the amine groups of PANI occurred. This study is expected to provide an opportunity to increase the utilization of lignin in the field of environmental science and provide several benefits.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of a lignin/polyaniline composite and its application in Cr(VI) removal from aqueous solutions

Seo

Choi

Bae

et al. 2019

BioRes

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“…It was reported that rice husk [7], olive stone [8], clay minerals [9][10][11][12], used tea leaves [13], wheat straw [14], banana peel [15,16], chitin and chitosan [17] as a good adsorbent, because these are easily available and less polluting substances. It was reported that metals are attached onto the surface of adsorbent in the adsorption process [18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Removal of Fe (II) from Wastewater onto Chemically Activated Sawdust

2018

International Journal of Advanced Research in Chemical Science

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The adsorption of the bio-sorbent of the chemically activated sawdust (CASD) with concentrated sulfuric acid 1:1 (w/v) was carried out for studying the removable kinetics of Fe (II) ions from industrial wastewater and the applicability of Langmuir and Freundlich isotherms was tested. The adsorption kinetics of the Fe (II) ions onto the CASD was studied using pseudo -first order, pseudo-second order and second order kinetics equations. Result shows that the optimum pH for Fe (II) adsorption onto the CASD was found to be 4 and the adsorption efficiency was found to be about 99 % and the maximum adsorption capacity was found to be 116 mg/g. These results showed that the CASD may be an attractive alternative for treatment of the industrial wastewater contaminated by Fe (II) ions.

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“…20,21 Recently the scientists are focused their attention on the synthesis of biocomposites, which are consisted of residual vegetation and polymeric substances. [22][23][24] It is known that for the treatment of different kinds of wastewaters constructed wetland systems are used. In them different macrophytes are growing -Phragmites australis, Typha latifolia, etc., which have the ability to extract and accumulate a variety of contaminants from the treated water.…”

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confidence: 99%

Cu(II) ions removal from aqueous solution by synthesized Phragmites australis/emeraldine base biocomposite

Lavrova¹,

Velichkova²,

Koumanova³

2017

ECB

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The influence of in situ synthesized biocomposite consisted of Phragmites australis (Pha) -common reed and emeraldine base (Emb) on the removal of copper ion from aqueous media is discussed. The biocomposites were prepared with two different ratios of common reed/aniline (samples Pha/Emb1 and Pha/Emb2, respectively. Physicochemical parameters such as initial copper ion concentration, composite dosage and contact time between the composites and Cu(II) ions in aqueous solution were studied. An assessment of the equilibrium and the kinetics of sorption of copper ions has been made. Removal efficiency of 99.6 % was achieved with Pha/Emb1 and 91.9 % with Pha/Emb2, respectively. The experimental results were fitted to the isotherms of Langmuir, Freundlich, Temkin and DubininRadushkevich. It was established that the Langmuir isotherm is more suitable for the case of emeraldine base and for composite Pha/Emb1, while the Dubinin-Radushkevich isotherm is more suitable for the case of Pha/Emb2 (with higher content of common reed). The influence of the plant quantity in the biocomposite is important for the mechanism of Cu 2+ removal. Physical adsorption and ion exchange are dominant in the case of Pha/Emb1, and Emb, while in the case of Pha/Emb2 the chemical interaction is predominant. The kinetics of Cu(II) adsorption onto biocomposites followed pseudo-second-order model. IntroductionThe industrial wastewaters in most cases contain metal ions which can be removed by chemical or physicochemical processes. Because of their hazard impact on the environment and the high cost of the used methods, it needs to develop new, cost-effective and efficient methods for industrial wastewater treatment. The most widely used methods for metal ions removal from aqueous medium is precipitation, adsorption and ion exchange, because of their effectiveness, low cost and possibility of metal recovery.Increasing attention to the biosorbents such as rice hulls, raw pomegranate peel, peanut shells, sphagnum moss peat, tree fern, as well as dried activated sludge, is paid because they are widely spread, not expensive raw materials.1-6 Also, there are various polymeric substances which can capture various ions, as a result of the complexation reactions. Such materials are chitosan, 7,8 polythioamide, 9 polypyrrole, 10 polyaniline, 11 etc. These polymers can be used either separately or as composites -the combination of different polymers 12,13,15 or combination of the polymer with some adsorbents. [14][15][16] One of the widely used polymeric substance is polyaniline, which conductive properties and complexing ability are well-known. The polyaniline can be found in one of three idealized oxidation states -leucoemeraldine, emeraldine, and (per)nigraniline. The emeraldine form of polyaniline exists as emeraldine salt and emeraldine base. The deprotonated nonconducting emeraldine base has more free electron pairs in its structure in comparison with protonated conducting emeraldine salt, which contribute to its better complexation ability. 17-19The co...

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The adsorption ability of Cr(VI) on sawdust–polyaniline nanocomposite

Cited by 4 publications

References 7 publications

Preparation of a lignin/polyaniline composite and its application in Cr(VI) removal from aqueous solutions

Preparation of a lignin/polyaniline composite and its application in Cr(VI) removal from aqueous solutions

Investigation on the Removal of Fe (II) from Wastewater onto Chemically Activated Sawdust

Cu(II) ions removal from aqueous solution by synthesized Phragmites australis/emeraldine base biocomposite

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