Removal of heavy metal ions from aquatic solutions by membrane chromatography

Deni̇zli̇, Adil; Say, Rıdvan; Arıca, Yakup

doi:10.1016/s1383-5866(00)00203-3

Cited by 48 publications

(23 citation statements)

References 19 publications

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“…The colour which dyes impart to water bodies is very undesirable to the water user for aesthetic reasons [1]. Due to the high concentration of organics in the effluents and the higher stability of modern synthetic dyes, their discharges into rivers are harmful to the aquatic life [2,3]. They are the copious source of coloured organics emanating as a waste from the textile dyeing process [4].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic removal of hazardous dye cyanosine from industrial waste using titanium dioxide

Jain

Shrivastava

2008

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Photocatalytic removal of hazardous dye cyanosine from industrial waste using titanium dioxide

Jain

Shrivastava

2008

Journal of Hazardous Materials

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“…Moreover, the copolymer nanosorbents have higher maximum adsorbances Q m than other sorbents reported heretofore (Table 4). [6][7][8][14][15][16][17][18][19][20][21] Effect of temperature: The Hg II sorption capacity of the copolymer nanoparticles increases strongly with increasing sorption temperature from 15 to 50 8C (Figure 7), because the diffusion and reactivity of Hg ions in the particles are accelerated at higher temperature. In addition, higher temperatures will also result in the formation of more free volume inside the polymer molecules.…”

mentioning

confidence: 99%

“…[21] Effect of ultrasonic treatment: As-prepared nanoparticles of the AN/SAA C H T U N G T R E N N U N G (50/50) copolymer are prone to aggregate during the drying process. Therefore, ultrasonic treatment before sorption is necessary to ensure that the particles become nanosized again for sufficient exposure of more inner func- ethylenediamine-modified methyl methacrylate 700 [7] thiol-functionalized organoceramic 740 [14] acrylamide-grafted sulfonamide-based resin 1154 [8] chlorosulfonamidated polystyrene resin 1384 [15] urea-grafted glycidyl methacrylate-based resin 1745 [16] Durvillaea potatorum 622 [17] activated carbon fiber 710 [5] glutaraldehyde-cross-linked chitosan 891 [18] benzoylthiourea-modified mesoporous silica 1000 [19] thiol-grafted chitosan 1605 [20] poly(aniline-co-5-sulfonic-2-anisidine) 2063 this work tional groups. The effect of ultrasonic treatment on the Hgion sorption of the copolymer particles is illustrated in Figure 9.…”

mentioning

confidence: 99%

Strong Adsorbability of Mercury Ions on Aniline/Sulfoanisidine Copolymer Nanosorbents

Feng

Huang

2009

Chemistry A European J

124

100

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The highest Hg-ion adsorbance so far, namely up to 2063 mg g(-1), has been achieved by poly(aniline-co-5-sulfo-2-anisidine) nanosorbents. Sorption of Hg ions occurs mainly by redox and chelation mechanisms (see scheme), but also by ion exchange and physisorption.Poly(aniline (AN)-co-5-sulfo-2-anisidine (SA)) nanoparticles were synthesized by chemical oxidative copolymerization of AN and SA monomers, and their extremely strong adsorption of mercury ions in aqueous solution was demonstrated. The reactivity ratios of AN and SA comonomers were found to be 2.05 and 0.02, respectively. While AN monomer tends to homopolymerize, SA monomer tends to copolymerize with AN monomer because of the great steric hindrance and electron-attracting effect of the sulfo groups, despite the effect of conjugation of the methoxyl group with the benzene ring. The effects of initial mercury(II) concentration, sorption time, sorption temperature, ultrasonic treatment, and sorbent dosage on mercury-ion sorption onto AN/SA (50/50) copolymer nanoparticles with a number-average diameter of around 120 nm were significantly optimized. The results show that the maximum Hg-ion sorption capacity on the particulate nanosorbents can even reach 2063 mg of Hg per gram of sorbent, which would be the highest Hg-ion adsorbance so far. The sorption data fit to the Langmuir isotherm, and the process obeys pseudo-second-order kinetics. The IR and UV/Vis spectral data of the Hg-loaded copolymer particles suggest that some mercury(II) was directly reduced by the copolymer to mercury(I) and even mercury(0). A mechanism of sorption between the particles and Hg ions in aqueous solution is proposed, and a physical/ion exchange/chelation/redox sorption ratio of around 2/3/45/50 was found. Copolymer nanoparticles may be one of the most powerful and cost-effective sorbents of mercury ions, with a wide range of potential applications for the efficient removal and even recovery of the mercury ions from aqueous solution.

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“…Mining and metallurgy of cadmium, cadmium electroplating, battery and accumulator manufacturing, pigment and ceramic industries waste waters contain undesired amount of Cadmium ions. Several methods have been developed to reduce cadmium in waste, such as adsorption, electrolysis, dialysis, complexation, ion exchange, solvent extraction, and some kind of membrane separation techniques [2][3][4][5][6][7][8][9][10]. Adsorption still become preferred method for reducing heavy metal in aquatic environment because it is simple and gives satisfactory result [11].…”

Section: Introductionmentioning

confidence: 99%

The novel kinetics expression of Cadmium (II) removal using green adsorbent horse dung humic acid (Hd-Ha)

Rahmat¹,

Santosa²,

Rusdiarso³

2017

AIP Conference Proceedings

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Abstract. Humic acid from dry horse dung powder has been prepared and this horse dung humic acid (HD-HA) was then applied as a sorbent to adsorb Cadmium(II) from a solution. Characterization of HD-HA was conducted by detection of its functional group, UV-Vis spectra, ash level, and total acidity. Result of the work showed that HD-HA had similar character compared with peat soil humic acid (PS-HA) and previous researchers. The adsorption study of this work was investigated by batch experiment in pH 5. The thermodynamics parameters in this work were determined by the Langmuir isotherm model for monolayer sorption and Freundlich isotherm model multilayer sorption. Monolayer sorption capacity (b) for HD-HA was 1.329 × 10 -3 mol g -1 , equilibrium constant (K) was 5.651 (mol/L), and multilayer sorption capacity was 2.646 × 10 -2 mol g -1 . The kinetics parameters investigated in this work were determined by the novel kinetics expression resulted from the mathematical derivation the availability of binding sites of sorbent. Adsorption rate constant (k a ) from this novel expression was 43.178 min -1 (mol/L) -1 and desorption rate constant (k d ) was 1.250 × 10 -2 min -1 . Application of the kinetics model on sorption Cd(II) onto HD-HA showed the nearly all of models gave a good linearity. However, only this proposed kinetics expression has good relation with Langmuir model. The novel kinetics expression proposed in this paper seems to be more realistic and reasonable and close to the experimental real condition because the value of k a /k d (3452 (mol/L) -1 ) was fairly close with K from Langmuir isotherm model (5651 (mol/L) -1 ). Comparison of this novel kinetics expression with well-known Lagergren pseudo-first order kinetics and Ho pseudo-second order kinetics was also critically discussed in this paper.

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Removal of heavy metal ions from aquatic solutions by membrane chromatography

Cited by 48 publications

References 19 publications

Photocatalytic removal of hazardous dye cyanosine from industrial waste using titanium dioxide

Photocatalytic removal of hazardous dye cyanosine from industrial waste using titanium dioxide

Strong Adsorbability of Mercury Ions on Aniline/Sulfoanisidine Copolymer Nanosorbents

The novel kinetics expression of Cadmium (II) removal using green adsorbent horse dung humic acid (Hd-Ha)

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