Heavy metal ion-exchange kinetic studies over cellulose acetate Zr(IV) molybdophosphate composite cation-exchanger

Ahamad, Tansir; Naushad, Mu.; Inamuddin, .

doi:10.1080/19443994.2013.855676

Cited by 15 publications

(10 citation statements)

References 33 publications

(36 reference statements)

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“…The gel like solution of cellulose acetate was prepared by dissolving cellulose acetate in concentrated formic acid (4 wt %/volume) [33,38].…”

Section: Preparation Of Cellulose Acetate-sn(iv) Molybdophosphatementioning

confidence: 99%

Cellulose acetate-Sn(IV) molybdophosphate: A biopolymer supported composite Exchanger for the removal of selected heavy metal ions

Taddesse¹,

Ketema²,

Teju³

2020

Bull. Chem. Soc. Eth.

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Cellulose acetate-tin(IV) molybdophosphate (CATMP) composite exchanger was prepared by mixing biopolymer celluloseacetate with its inorganic counterpart tin(IV) molybdophosphate (TMP) using sol‑gel method. The physical characterization of the as synthesized exchanger was carried out by FTIR, XRD, BET, TGA-DTG and SEM-EDX techniques. Chemical properties such as ion exchange capacity, chemical stability, pH and distribution behavior were carried out. The average IEC of the composite material, as determined by batch equilibrium, was found to be 2.43 meq/g for Na+ ion; higher than its inorganic counterpart, i.e. 1.41 meq/g. This exchanger was also found to be stable in water, acids and organic solvents, but unstable in basic medium. The distribution study (Kd) of the exchanger in different solvent systems showed promising separation potential of the exchanger towards metal ions of analytical interest from a given mixture of toxic heavy metal ions. The sorption studies revealed that the material was selective for Cr(III) and Cd(II) ions and moderately selective for Co(II) ion in solvents employed in this work. Its selectivity was examined by achieving some important binary separations of metal cations on its column indicating its promising application in environmental pollution abatement. KEY WORDS: Cation exchanger, Biopolymer, Organic-inorganic hybrid, Sol–gel method, Binary distribution Bull. Chem. Soc. Ethiop. 2020, 34(2), 259-276 DOI: https://dx.doi.org/10.4314/bcse.v34i2.5

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“…The gel like solution of cellulose acetate was prepared by dissolving cellulose acetate in concentrated formic acid (4 wt %/volume) [33,38].…”

Section: Preparation Of Cellulose Acetate-sn(iv) Molybdophosphatementioning

confidence: 99%

Cellulose acetate-Sn(IV) molybdophosphate: A biopolymer supported composite Exchanger for the removal of selected heavy metal ions

Taddesse¹,

Ketema²,

Teju³

2020

Bull. Chem. Soc. Eth.

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“…The main origins of water pollution caused by heavy metals are industrial wastewaters from plating, mining, chemicals, refining of petroleum and so on 1) . The methods used to remove heavy metals from such wastewater include electrochemical techniques, photocatalytic reactions 2) , membrane separation 3,4) , coagulation sedimentation 5) , ion exchange 6,7) and adsorption 8,9) . However, these techniques are expensive, complicated processing, high energy, and a risk of causing problems such as consumption and secondary contamination.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Sulfur-Impregnated Carbonaceous Filter with High Heavy Metal Adsorption Capacity

Iguchi

Wajima

2018

J.I.E.

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The adsorption method for heavy metal removal from wastewater is focused because of its simplicity and high versatility, and sulfur-impregnated carbonaceous adsorbent is expected as heavy metal adsorbent with high performance at low cost. In this study, sulfur-impregnated carbonaceous filter for removing heavy metals were prepared by pyrolysis of cotton immersed in sulfur solution, K 2 S, Na 2 S and NaHS, and the adsorption behavior of nickel was investigated. A nickel adsorption experiment was carried out using a syringe. The sulfur-immersed carbonaceous filter was prepared from cotton via pyrolysis at 400 °C for 1 h after immersing to sulfur solution for 12 h. In the experiment, a syringe which filled with 1 g of the obtained filter and glass wool was used, and a nickel solution was passed through the syringe. The filter with nickel adsorption can be prepared using all sulfur solutions, especially the product prepared by using Na 2 S has higher adsorption ability than the products using K 2 S and NaHS. The product obtained using over 0.4 M K 2 S solution was effective for nickel adsorption. The equilibrium data of nickel adsorption on the product using 1 M K 2 S was found to Langmuir isotherm model better than Freundlich, and the calculated maximum adsorption capacity is 0.215 mmol/g.

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“…Heavy metal ions should be removed from these wastewater before discharging to natural water. Present methods for removing heavy metal include coagulation sedimentation [1], ion exchange [2,3], membrane filtration [4,5] and adsorption method [6,7]. Among them, the adsorption method is known to be able to remove heavy metals efficiently with a simple process even at low concentration.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Reduction Precipitation of Nickel Adsorbed on the Surface of Sulfur-Impregnated Carbonaceous Cotton

2018

JESR

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In this study, reduction treatment was applied to nickel adsorbed on a sulfur-impregnated carbonaceous cotton prepared using sulfide aqueous solutions, and the precipitation behavior of nickel was determined. Two types of sulfide solutions, K2S and Na2S, were used for preparation of the sulfur-impregnated adsorbent. A cotton immersed in sulfide solution was pyrolyzed in an electric tubular furnace to obtain the fibrous adsorbent. Nickel was adsorbed on the surface of the adsorbent by passing a 10 mM Ni(NO3)2 solution through the obtained adsorbent, and the fibrous adsorbent adsorbed nickel was heated in N2 atmosphere using an electric tubular furnace as reduction treatment. The adsorbents on each process were analyzed by X-ray diffraction (XRD) and observed by scanning electron microscope (SEM), respectively, and the effects of sulfide type, concentration and reduction temperature on the precipitation behavior of nickel adsorbed on the sulfur-impregnated cotton was examined. The adsorption amount of the adsorbent obtained using 1.0 M Na2S was higher than that using 1.0 M K2S. From the analysis of adsorption isotherms using Langmuir and Freundlich model, the Langmuir model matched the data better than the Freundlich model for both adsorbents, and maximum adsorption capacity calculated from the Langmuir isotherm model for the adsorbent obtained using Na2S was 0.43 mmol/g, which was higher than that using K2S (0.27 mmol/g). Ni3S2 was precipitated on the adsorbent prepared using 1.0 M K2S by reduction treatment at more than 800 o C, while metallic nickel was precipitated on the adsorbent prepared using 0.5 M Na2S by reduction treatment at more than 800 o C. The amount and size of the precipitated particles increased with increasing the reduction temperature.

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Heavy metal ion-exchange kinetic studies over cellulose acetate Zr(IV) molybdophosphate composite cation-exchanger

Cited by 15 publications

References 33 publications

Cellulose acetate-Sn(IV) molybdophosphate: A biopolymer supported composite Exchanger for the removal of selected heavy metal ions

Cellulose acetate-Sn(IV) molybdophosphate: A biopolymer supported composite Exchanger for the removal of selected heavy metal ions

Preparation of Sulfur-Impregnated Carbonaceous Filter with High Heavy Metal Adsorption Capacity

Behavior of Reduction Precipitation of Nickel Adsorbed on the Surface of Sulfur-Impregnated Carbonaceous Cotton

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