Evaluation of batch adsorption of chromium ions on natural and crosslinked chitosan membranes

Baroni, Paula; Vieira, Rodrigo Silveira; Meneghetti, Emerson; Silva, M.G.C. da; Beppu, Marisa M.

doi:10.1016/j.jhazmat.2007.07.099

Cited by 155 publications

(76 citation statements)

References 24 publications

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“…Compared with chitosan, due to the loss of amino group during the glutaraldehyde cross-linking and adsorption of SA, as well as the blocking function to some adsorption sites by the cross-linking reagent in the spatial structures, different degrees of decreases occurred in the adsorption capacity of the cross-linked products (Baroni et al 2008;Ngah et al 2002). However, the cross-linking of glutaraldehyde to chitosan is necessary.…”

Section: Adsorption Capacity Of Algicide To Heavy Metalsmentioning

confidence: 99%

Effects of algicide on the growth of Microcystis flos-aquae and adsorption capacity to heavy metals

Liu

Wen

Chen

2014

Int. J. Environ. Sci. Technol.

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In this paper, the effects of salicylic acid (SA) algicide carried by cross-linked chitosan on the inhibition of Microcystis flos-aquae and the removal ability of heavy metals Pb and Ni in compound polluted water were studied. The results showed that the algicide had significant inhibitory effects on Microcystis flos-aquae: when the concentrations were 550 and 700 mg L -1 , the inhibition time was up to 13 days or more, and the inhibition rate was as high as 99 %. The algicide exhibited strong adsorption capacity to heavy metals Pb and Ni. The adsorption rates of the algicide at concentrations of 400 and 550 mg L -1 on Ni and Pb were 61 and 64.9 %, 71.2 and 72.5 % at 13 days, respectively. The algicide allows a slow release of SA and long-term inhibition of algae and has better adsorption capacity on heavy metals, thus providing a method for the effective control of eutrophication and combined heavy metal pollution in water.

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Section: Adsorption Capacity Of Algicide To Heavy Metalsmentioning

confidence: 99%

Effects of algicide on the growth of Microcystis flos-aquae and adsorption capacity to heavy metals

Liu

Wen

Chen

2014

Int. J. Environ. Sci. Technol.

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“…These concentrations were chosen based in a previous study 11 , which determined the maximum adsorbed amounts by static experiments.…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…In a previous study 11 we investigated the effect of crosslinking reaction in the chromium adsorption properties on chitosan membranes in batch adsorption experiments. In this study, we focused in investigating the dynamic adsorption properties using fixed-bed experiments, which are more applicable to real industrial processes.…”

Section: Introductionmentioning

confidence: 99%

Dynamic adsorption of chromium ions onto natural and crosslinked chitosan membranes for wastewater treatment

et al. 2010

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Water pollution with heavy metals is a matter of major concern for public health and also for natural resource management. The present study investigated the effect of chemical modifications on biopolymeric adsorbents (based on chitosan membranes) for chromium removal using fixed-bed dynamic adsorption technique. Parameters such as flow rate, initial concentration and crosslinking agents were evaluated, from a practical point-of-view, in order to optimize the adsorption capacity of natural, glutaraldehyde and epichlorohydrin crosslinked chitosan membranes. The adsorption capacity of natural and epiclorohydrin-crosslinked chitosan membranes were very close to each other; however, glutaraldehyde-crosslinked chitosan membranes presented nearly twice the adsorption capacity compared to the other membranes, being the most promising adsorbent in such mass-transfer systems.

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“…Because of its coarse porous structure, low toxicity, and the presence of free amino groups, chitosan has been considered an excellent candidate as a support for such purposes. The amine groups on chitosan chain have been already shown to serve as a selective chelating site for transition metal ions [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Fully Deacetylated Chitosan for Adsorption of Hg(II) Ion from Aqueous Solution

Thien¹

2015

Chem Sci J

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In this work, the fully deacetylated chitosan (FCS) was obtained from the deacetylation process of chitosan ( = 31%) in 5% NaOH solution. The structure of FCS was characterized by nuclear magnetic resonance (NMR) spectroscopy, X-Ray diffraction and Bruauer -Emment -Teller (BET) analysis. The FCS was used to adsorb Hg(II) ion from aqueous solutions. The influences of various operating parameters such as pH, temperature, initial concentration of Hg(II) ion and contact time on the adsorption capacity of FCS have been investigated. The results showed that the adsorption capacity of FCS for Hg(II) ion rapidly reached equilibrium within 60 min and strongly depended on pH and temperature. Langmuir and Freundlich adsorption models were applied to describe the isotherms and isotherm constants. It was shown that the FCS had given good correlation with Langmuir isotherm model and the adsorption kinetics of Hg(II) ion could be best described by the pseudo-second-order model.

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Evaluation of batch adsorption of chromium ions on natural and crosslinked chitosan membranes

Cited by 155 publications

References 24 publications

Effects of algicide on the growth of Microcystis flos-aquae and adsorption capacity to heavy metals

Effects of algicide on the growth of Microcystis flos-aquae and adsorption capacity to heavy metals

Dynamic adsorption of chromium ions onto natural and crosslinked chitosan membranes for wastewater treatment

Preparation of Fully Deacetylated Chitosan for Adsorption of Hg(II) Ion from Aqueous Solution

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