Wool powders used as sorbents to remove Co2+ ions from aqueous solution

Wen, Guiqing; Naik, Radhika; Cookson, Peter; Smith, Suzanne V.; Liu, Xin; Wang, Xungai

doi:10.1016/j.powtec.2009.09.021

Cited by 39 publications

(27 citation statements)

References 26 publications

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“…This finding revealed that small amounts of Fe and Cu were fixed on the wool fibre, coming from the chemical ingredients of the Cu-Fe bimetallic wool fibre complex. The bands at 1100-1040 cm À1 are related to the S-O symmetric stretching mode of cysteic acid, and have been verified in the degeneration of wools into cysteic acid [33]. Wool fibre has various characteristic absorption peaks in the ranges 1700-1600 cm À1 , 1540-1480 cm À1 , 1301-1229 cm À1 , and 767-625 cm À1 , corresponding to -CONH-(CO stretching vibration of amide I; CN stretching vibration and NH flexural vibrations of amide II; CN stretching of amide III; OCN flexural vibrations, etc., of amide IV, respectively) [30,33].…”

Section: Effect Of Temperaturementioning

confidence: 79%

“…Small peaks for Fe and Cu were detected at 6.38 and 8.05 keV in addition to C, O, N, and S in the spectra in Figure 4b,c respectively, which indicated the deposition of Fe and Cu complexes on the coordinated wool fibre. Wool fibre has various characteristic absorption peaks in the ranges 1700-1600 cm À1 , 1540-1480 cm À1 , 1301-1229 cm À1 , and 767-625 cm À1 , corresponding to -CONH-(CO stretching vibration of amide I; CN stretching vibration and NH flexural vibrations of amide II; CN stretching of amide III; OCN flexural vibrations, etc., of amide IV, respectively) [30,33]. This finding revealed that small amounts of Fe and Cu were fixed on the wool fibre, coming from the chemical ingredients of the Cu-Fe bimetallic wool fibre complex.…”

Section: Effect Of Temperaturementioning

confidence: 82%

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Novel heterogeneous photocatalysts prepared with waste wool and Fe³⁺ or Cu²⁺ ions for degradation of CI Reactive Red 195: a comparative study

Cui

Dong

et al. 2017

Coloration Technology

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In order to reuse waste wool, two transition metal ions, Fe 3+ and Cu 2+ , were coordinated to with it to prepare a series of metal-wool complexes as new heterogeneous Fenton photocatalysts for the degradation of a typical azo dye, CI Reactive Red 195, in aqueous solution. The effect of the initial metal ion concentration and temperature on the reaction was investigated. Furthermore, the catalytic performance of the resulting metalwool complexes was evaluated with respect to the dye decoloration efficiency at different pH levels under visible irradiation. The results demonstrated that increasing the initial metal ion concentration and temperature enhanced ion coordination to produce complexes of increased metal content. The obtained Fe-wool showed a higher metal content than the Cu-wool. The light adsorption performance in the UV and visible regions of Cu-Fe-wool is stronger than that of Fe-wool or Cu-wool. Furthermore, Cu-Fe-Wool was found to have a higher catalytic activity than the other two complexes under visible irradiation, especially in the alkaline pH range. Coloration Technology Society of Dyers and Colourists 200

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Section: Effect Of Temperaturementioning

confidence: 79%

Section: Effect Of Temperaturementioning

confidence: 82%

Novel heterogeneous photocatalysts prepared with waste wool and Fe³⁺ or Cu²⁺ ions for degradation of CI Reactive Red 195: a comparative study

Cui

Dong

et al. 2017

Coloration Technology

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“…The relatively low amount of Pb(II) removed using wool is likely due to the presence of the cuticle cells, which are known to act as barriers to the diffusion of chemicals into wool (Wen et al 2010). Keratin colloid particles also removed Pb(II) from water more efficiently than keratin powder.…”

Section: Pb(ii) Removal By Keratin Colloidal Solutionmentioning

confidence: 99%

Removal of Pb(II) from water using keratin colloidal solution obtained from wool

Sekimoto

Okiharu

Nakajima

et al. 2013

Environ Sci Pollut Res

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The aim of this study is to investigate the use of keratin colloidal solution, which was obtained from wool, for the removal of Pb(II) from water. The addition of keratin colloidal solution (15 g L -1 ; 0.30 mL) to a Pb(II) solution (1.0 mM; 0.90 mL; pH 5.0) resulted in the formation and precipitation of a Pb-keratin aggregate. Measurement of the Pb(II) and protein concentrations in the supernatant solution revealed that 88 and 99% of the Pb(II) and keratin protein were removed from the solution, respectively. The maximum Pb(II) uptake capacity of keratin in the colloidal solution was 43.3 mg g -1 . In addition, the Pb-keratin aggregate was easily decomposed via the addition of nitric acid, which enabled the recovery of Pb(II). However, aggregation did not occur in solutions with Pb(II) concentrations below 0.10 mM. Therefore, we used a keratin colloidal solution encapsulated in a dialysis cellulose tube to remove Pb(II) from 0.10 mM solutions, which enabled the removal of 95% of the Pb(II). From these results, we conclude that keratin colloidal solution is useful for the treatment of water polluted with Pb(II).

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“…Wool keratin powders, incorporated with glycerol as plasticizer and sodium sulfite as reductant were hot‐pressed into bio‐thermoplastics . Wool keratin powders also showed higher sorption rates and capacities to heavy metal ions such as Co 2+ , Cu 2+ , and Cd 2+ and dyes in effluent from dyeing industry than wool fibers . The sorption rates and capacities to acid dyes by wool powders were comparable with that of activated charcoal …”

Section: Introductionmentioning

confidence: 96%

Hydrothermal pretreatment for the preparation of wool powders

Hou

Shi

et al. 2013

J of Applied Polymer Sci

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Wool powders with low solubility could be easily prepared from wool fibers by combining hydrothermal pretreatment (HTP) and grinding processes. Transforming wool fibers into powders was the first step of exploiting wool as new materials such as bio-thermoplastics. However, wool fibers were difficult to be prepared into powders only by grinding due to their toughness. This article used a chemical-free method to obtain wool powders by grinding HTP-treated wool fibers. Wool fibers after HTP at 130 C for 40 min or above were obviously easier to be broken into snippets with lengths of 25-150 lm after grinding for 1 min and shapeless super-fine powders with diameters of 3-15 lm after ball milling for 10 min. Wool fibers after HTP were brittle mainly owing to decrease of a-helices and SAS bonds. Combination of HTP and grinding could be an eco-friendly and feasible treatment to prepare wool powders on industrial scale.

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Wool powders used as sorbents to remove Co2+ ions from aqueous solution

Cited by 39 publications

References 26 publications

Novel heterogeneous photocatalysts prepared with waste wool and Fe³⁺ or Cu²⁺ ions for degradation of CI Reactive Red 195: a comparative study

Novel heterogeneous photocatalysts prepared with waste wool and Fe³⁺ or Cu²⁺ ions for degradation of CI Reactive Red 195: a comparative study

Removal of Pb(II) from water using keratin colloidal solution obtained from wool

Hydrothermal pretreatment for the preparation of wool powders

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Wool powders used as sorbents to remove Co2+ ions from aqueous solution

Cited by 39 publications

References 26 publications

Novel heterogeneous photocatalysts prepared with waste wool and Fe3+ or Cu2+ ions for degradation of CI Reactive Red 195: a comparative study

Novel heterogeneous photocatalysts prepared with waste wool and Fe3+ or Cu2+ ions for degradation of CI Reactive Red 195: a comparative study

Removal of Pb(II) from water using keratin colloidal solution obtained from wool

Hydrothermal pretreatment for the preparation of wool powders

Contact Info

Product

Resources

About

Novel heterogeneous photocatalysts prepared with waste wool and Fe³⁺ or Cu²⁺ ions for degradation of CI Reactive Red 195: a comparative study

Novel heterogeneous photocatalysts prepared with waste wool and Fe³⁺ or Cu²⁺ ions for degradation of CI Reactive Red 195: a comparative study