Biosorption of toxic chromium from aqueous phase by lignin: mechanism, effect of other metal ions and salts

Albadarin, Ahmad B.; Al-Muhtaseb, Ala’a H.; Al-Laqtah, Nasir; Walker, Gavin; Allen, Stephen; Ahmad, Mohammad Norazmi

doi:10.1016/j.cej.2011.02.044

Cited by 181 publications

(113 citation statements)

References 56 publications

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“…The pH zpc of ACRF is at 9.19 and below this pH, the surface charge of the ACRF is positive. Hence, adsorption of Cr(VI) might also be due to electrostatic attraction between positively charged adsorbent and negatively charged HCrO 4 - [18]. As the pH increased, the overall surface charge on the adsorbents became negative and adsorption decreased [19].…”

Section: Effect Of Initial Phmentioning

confidence: 99%

Experimental Investigation on Chromium(vi) Removal From Aqueous Solution Using Activated Carbon Resorcinol Formaldehyde Xerogels

Oyedoh

Ekwonu

2016

Acta Polytech

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Abstract. The adsorption of chromium(VI) metal ion in aqueous solutions by activated carbon resorcinol formaldehyde xerogels (ACRF) was investigated. The results showed that pore structure, surface area and the adsorbent surface chemistry are important factors in the control of the adsorption of chromium(VI) metal ions. The isotherm parameters were obtained from plots of the isotherms and from the application of Langmuir and Freundlich Isotherms. Based on regression analysis, the Langmuir isotherm model was the best fit. The maximum adsorption capacity of ACRF for chromium (VI) was 241.9 mg/g. The pseudo-second-order kinetic model was the best fit to the experimental data for the adsorption of chromium metal ions by activated carbon resorcinol formaldehyde xerogels. The thermodynamics of Cr(VI) ions adsorption onto ACRF was a spontaneous and endothermic process.

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Section: Effect Of Initial Phmentioning

confidence: 99%

Experimental Investigation on Chromium(vi) Removal From Aqueous Solution Using Activated Carbon Resorcinol Formaldehyde Xerogels

Oyedoh

Ekwonu

2016

Acta Polytech

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“…Han et al (2008) observed that in the presence of sulfate, a new species CrO 3 SO 4 2-was formed and could be more easily adsorbed on biomass surface than HCrO 4 -. Albadarin et al (2011) studied the effect of various salts on the biosorption of Cr(VI) onto a lignin biosorbent and found a positive effect of SO 4 2-and NH 4 + on the adsorption efficiency (NH 4 + may attribute to the reduction of the repulsion between the Cr(VI) and the surface), but a negative effect in the presence of CO 3 2− and P 2 O 7 2− (which can be due to the competition of these anions with Cr(VI) for the binding sites of the biosorbents). Moreover, presence of DOC in water positively affects the Cr(VI) reduction to Cr(III) (Saputro et al 2014).…”

Section: Resultsmentioning

confidence: 99%

Biosorption of Cr(VI) from natural groundwater and the effect of DOC-rich treated water on Cr dissolving from contaminated soil

Šillerová¹,

Vaněk²,

Chrastný³

et al. 2015

Soil & Water Res.

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AbstractŠillerová H., Vaněk A., Chrastný V., Komárek M. (2015): Biosorption of Cr(VI) from natural groundwater and the effect of DOC-rich treated water on Cr dissolving from contaminated soil. Soil & Water Res., 10: 236-243.Brewers draff and grape waste were used as efficient biosorbents for removing Cr(VI) from contaminated groundwater. Additionally, the interactions between the dissolved organic carbon-rich (DOC-rich) treated water and a soil contaminated with Cr(III) was further studied. The breakthrough curves obtained from column (dynamic) adsorption experiments showed higher adsorption efficiency of grape waste compared to brewers draff. The adsorption efficiency was 36.8-40.4% for brewers draff and 56.6-68.3% for grape waste, depending on the initial pH. The detected saturation time was approximately three times higher than in our previous study, where a model solution of Cr(VI) was used. The natural groundwater showed to be rich in dissolved organic matter after the treatment. The consequent interaction of the treated water with the soil led to a partial dissolution of Cr from the contaminated soil (corresponding to < 1% of total soil Cr) in the case of brewers draff, but also to adsorption of the residual Cr from the treated water to the soil in the case of grape waste. The obtained data demonstrated that Cr(III), when abundant in soils, could be potentially mobilized by the DOC-rich solution. On the other hand, the risk associated with this secondary Cr mobilization and its subsequent migration in soils (or sediments) seems to be very low or even negligible.

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“…As shown in Figure 4, the electricity conductivity decreases from 1.29 ms down to 0.96 ms with pH decreased from 5.26 to 4.86 at first 40min. It indicated that amine and carboxyl groups were be intoduced on the surface of pith, which improved its adsorption capability [24]. This would be explained by two steps of adsorption.…”

Section: Influence Of Solution Initial Phmentioning

confidence: 99%

“…Intra-particle diffusion would not be the rate-limiting step, and more than one processes affect the sorptioned by. The initial segment of the plots implied first step is external mass-transfer, and the latter segment of the plots implied the second step is pore or intra-particle diffusion [24].…”

Section: Adsorption Kinetics Investigationsmentioning

confidence: 99%

Copper (II) Removed from Aqueous Solutions by Aminated Bagasse Pith

Liu¹,

Nie²,

Wang³

2016

JRST

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ABSTRACT:The paper investigated the heavy metal ions adsorption by bio-adsorbent obtained from modifying bagasse pith. The bagasse pith, a main solid bio-waste from sugar and pulp industry, was treated by epichlorohydrin and diethylenetriamine. The pith before and after modification were analyzed to characterize its structure change by Fourier Transform Infrared Spectroscopy and Scanning Electron Microscope. It shown that numbers of minor fragments cohere to the surface of fibrous bundle of modified pith. The carboxyl groups has been introduced with the change of substitutional groups in aromatic skeletal of lignin on surface of pith. The kinetics and thermo-dynamic properties were studied. The results shown the adsorption process are well described by Langmuir isotherm and pseudo-2nd order model. It is considered that the bagasse pith, a renewable bio-waste, would be modified to treat the waste water polluted by heavy metal in further studies.

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Biosorption of toxic chromium from aqueous phase by lignin: mechanism, effect of other metal ions and salts

Cited by 181 publications

References 56 publications

Experimental Investigation on Chromium(vi) Removal From Aqueous Solution Using Activated Carbon Resorcinol Formaldehyde Xerogels

Experimental Investigation on Chromium(vi) Removal From Aqueous Solution Using Activated Carbon Resorcinol Formaldehyde Xerogels

Biosorption of Cr(VI) from natural groundwater and the effect of DOC-rich treated water on Cr dissolving from contaminated soil

Copper (II) Removed from Aqueous Solutions by Aminated Bagasse Pith

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