Removal of Hg(II) from aqueous solutions using a novel impregnated resin containing 1-(2-thiazolylazo)-2-naphthol (TAN)

Hosseini-Bandegharaei, Ahmad; Hosseini, Mohammad Saeid; Jalalabadi, Yousef; Sarwghadi, Masoud; Nedaie, Mehdi; Taherian, Akram; Ghaznavi, Ahmad; Eftekhari, Ahmad

doi:10.1016/j.cej.2011.02.004

Cited by 65 publications

(28 citation statements)

References 50 publications

(62 reference statements)

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“…A large numbers of analytical procedures for Hg(II) preconcentration and separation, mainly based on liquid-liquid extraction (Karadjova et al 2004), coprecipitation (Leyva et al 2007), solid phase extraction (SPE) (Hosseini-Bandegharaei et al 2011), ion exchange (Horvat et al 1993), and membrane separation (Bic et al 2003), have been reported.…”

Section: Introductionmentioning

confidence: 99%

Determination of Hg(II) ions in sea food samples after extraction and preconcentration by novel Fe3O4@SiO2@polythiophene magnetic nanocomposite

Abolhasani

Khanmiri

Babazadeh

et al. 2015

Environ Monit Assess

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This work describes a novel Fe3O4@SiO2@polythiophene magnetic nanocomposite and its application in the preconcentration of Hg(II) ions. The parameters affecting the preconcentration procedure were opted by a Box-Behnken design through response surface methodology. Three factors (uptake time, magnetic nanosorbent amount, and pH of sample) were selected as the main factors affecting the sorption step, while four variables (type, volume and concentration of the eluent as well as the elution time) were selected as main factors in the optimization study of the elution step. Following the sorption and elution of Hg(II), it was quantified by cold vapor atomic absorption spectrometry. Under the optimum condition, the limit of detection was 0.02 ng mL(-1) and all the relative standard deviations were less than 9.2 %. The obtained sorption capacity of this new sorbent was 59 mg g(-1). Finally, this nanocomposite was successfully applied to the rapid extraction of trace quantities of Hg(II) ions in sea food samples and satisfactory results were obtained.

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Section: Introductionmentioning

confidence: 99%

Determination of Hg(II) ions in sea food samples after extraction and preconcentration by novel Fe3O4@SiO2@polythiophene magnetic nanocomposite

Abolhasani

Khanmiri

Babazadeh

et al. 2015

Environ Monit Assess

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“…Sitter et al [17] observed that permeability increased with filler content, hence 15% (w/w) Na 2 SO 4 is considered adequate for the improvement of water penetration. Optimization of pH for any sorption medium plays an important role in sorption studies [18] because pH influences the chemical speciation of the metal ions in solution. The amount of Pb 2?…”

Section: Heavy Metal Uptakementioning

confidence: 99%

“…at 20°C are given in Table 2. The essential feature of the Langmuir sorption model is expressed as R L , a dimensionless constant referred to as separation factor or equilibrium parameter for predicting whether a sorption system is favourable or unfavourable [18]. The constant R L is calculated from the initial concentration by Eq.…”

Section: Langmuir Modelmentioning

confidence: 99%

Adsorption Behaviour of Ethylene Vinyl Acetate and Polycaprolactone-Bentonite Composites for Pb2+ Uptake

Dlamini¹,

Mishra²,

Mamba³

2011

J Inorg Organomet Polym

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The results presented in this work show that the hydrophobic thermoplastics, namely ethylene vinyl acetate (EVA) and polycaprolactone (PCL), could be good matrices for the synthesis of polymer/bentonite composites via the melt-blending method for the removal of heavy metals from water. The hydrophobic nature of the polymers was countered by using dry Na 2 SO 4 to form large free-volume pores. These pores, formed after the removal of the Na 2 SO 4 by washing, improved the contact ratio between bentonite particles and Pb 2? ions. The composites were able to achieve up to 78% Pb 2? removal at an initial concentration of 200 mg/L in 10 h with a clay loading of 3% (w/w). The results confirmed that the PCL/bentonite composite was more effective and efficient in the adsorption of Pb 2? than the EVA/bentonite composite. The experimental data for both composites followed Langmuir and Freundlich models. The uptake of Pb 2? was found to be a result of a chemical interaction between the heavy metal, silanol (Si-OH) and aluminol (Al-OH) groups. The adsorption of Pb 2? onto the composites was found to follow pseudo-first-order kinetics and the results supported a monomolecular reaction mechanism.

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“…Optimisation of pH for sorption medium plays an important role in sorption studies (Hosseini-Bandegharaei et al, 2011). This is because the hydronium ions are strong competing adsorbate ions and partly due to the fact that the pH of a solution influences the chemical speciation of the metal ions in solution.…”

Section: Effect Of Phmentioning

confidence: 99%

Comparative study of EVA-Cloisite<sup>®</sup> 20A and heat-treated EVA-Cloisite<sup>®</sup> 20A on heavy-metal adsorption properties

Dlamini¹,

Mishra²,

Mamba³

2012

WSA

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Ethylene vinyl acetate (EVA)/ Cloisite® 20A (C20A) composite fabricated via the melt-blending method was used for the development of a heavy-metal adsorbent through acid and heat treatment. Heat-treated composites were produced at 400°C to 1 000°C in air and N 2 atmospheres. The materials were characterised through TGA, FT-IR, contact angle and Zetasizer. Treating EVA/C20A composites with H 2 SO 4 at 130°C reduced the contact angle from 99.73° to 30.40°. The acid-functionalised composite was tested for the removal of Pb 2+ and an adsorption capacity of 49 mg•g −1 was recorded while the heattreated composite exhibited an adsorption capacity of 153 mg•g −1.

show abstract

Removal of Hg(II) from aqueous solutions using a novel impregnated resin containing 1-(2-thiazolylazo)-2-naphthol (TAN)

Cited by 65 publications

References 50 publications

Determination of Hg(II) ions in sea food samples after extraction and preconcentration by novel Fe3O4@SiO2@polythiophene magnetic nanocomposite

Determination of Hg(II) ions in sea food samples after extraction and preconcentration by novel Fe3O4@SiO2@polythiophene magnetic nanocomposite

Adsorption Behaviour of Ethylene Vinyl Acetate and Polycaprolactone-Bentonite Composites for Pb2+ Uptake

Comparative study of EVA-Cloisite<sup>®</sup> 20A and heat-treated EVA-Cloisite<sup>®</sup> 20A on heavy-metal adsorption properties

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