Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: effect of temperature, pH and water hardness

Martins, Ramiro; Pardo, R.; Boaventura, Rui A.R.

doi:10.1016/j.watres.2003.10.013

Cited by 248 publications

(107 citation statements)

References 30 publications

(22 reference statements)

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“…The sources of aquatic heavy metal pollution are broad; including industry, agriculture, and even sewage from domestic sources can cause aquatic heavy metal pollution (Du et al 2011;Ikem and Adisa 2011;Kansanen and Venetvaara 1991;Reza and Singh 2010). Heavy metals can be absorbed by aquatic organisms but cannot be degraded and as a result they accumulate through food chains and cause long-term adverse effects at a range of trophic levels (Ahmad et al 2010;Dizadji et al 2011;Göbel et al 2007;Martins et al 2004;Zvinowanda et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Sorption of heavy metals from aqueous solution by dehydrated powders of aquatic plants

Deng

Liu

Zeng

et al. 2013

Int. J. Environ. Sci. Technol.

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Ruppia maritima and Echinodorus amazonicus were prepared in a dehydrated powder form. The characteristics and mechanisms of adsorption of heavy metals were studied under various pH values, reaction times, and heavy metal ion concentrations. The results showed that under different pH and reaction time conditions, heavy metal adsorption was leadThe adsorption of lead increased linearly with the lead concentration. For cadmium, zinc and copper, the adsorption was saturated when metal ion concentration exceeded 200 mg/L. When a Freundlich model was applied, R 2 values for the heavy metal adsorption by the aquatic plants mostly exceeded 0.9. The adsorption of heavy metal ions by these two aquatic plant powders was better explained by the Lagergren second-order equation than the first-order equation. From the Fourier Transform Infrared spectra, there was an adsorption peak at 2,115 cm -1 for R. maritima. The peak shape did not change with metal affiliation except there was a shift of peak wavelength before adsorption. The results indicate that the mechanism of heavy metal adsorption by the two species is not simply on the mono-molecular layer level, and that intra-particulate dispersal is the dominant process. Heavy metal pollution does not affect the basic chemical components, and major substances involved in heavy metal adsorption including carbohydrates, cell wall pectin, and protein functional groups.

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Section: Introductionmentioning

confidence: 99%

Sorption of heavy metals from aqueous solution by dehydrated powders of aquatic plants

Deng

Liu

Zeng

et al. 2013

Int. J. Environ. Sci. Technol.

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“…Different dead biomass types, such as bacteria [5,6], fungi [7], blue-green algae [8], green algae [9], red algae [10], brown algae [11][12][13], peat biomass [14], chitosan [15], aquatic mosses [16], tree fern [17], waste brewery biomass [18] and many other low-cost biosorbents have been applied to remove cadmium ions from solution.…”

Section: Introductionmentioning

confidence: 99%

Cadmium uptake by algal biomass in batch and continuous (CSTR and packed bed column) adsorbers

Vilar¹,

Santos²,

Martins³

et al. 2008

Biochemical Engineering Journal

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a b s t r a c tIn this work, the properties of marine algae Gelidium, algal waste from agar extraction industry and a composite material were investigated for cadmium(II) biosorption. Equilibrium experiments were performed at three pH values (4, 5.3 and 6.5). Equilibrium data were well described by the Langmuir and Langmuir-Freundlich isotherms. Two models predicting the pH influence in the cadmium biosorption (discrete and continuous models) have been developed in order to better describe the equilibrium. The continuous model also considers a heterogeneous distribution of carboxylic groups, determined by potentiometric titration. The results of batch kinetic experiments performed at different pH values were well fitted by two mass transfer models and the homogeneous diffusion coefficients for the cadmium ions inside the biosorbent were obtained. Continuous stirred tank reactor (CSTR) and packed bed column configurations were also examined for the biosorption of cadmium ions. A strong acid (0.1 M HNO 3 ) was used as eluant to regenerate the biosorbents in the column. Several mass transfer models were applied with success to describe the biosorption process in batch mode, CSTR and fixed bed column.

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“…Lead(II) is released into the aqueous streams by printing, lead smelting and mine tailings, lead batteries and glass manufacturing industries. Human exposure to Pb(II) and Cd(II) above the permissible limits (0.005 mg/L for Pb 2+ and 0.015 mg/L for Cd 2+ (USEPA, 2009) are potentially toxic and may cause kidney and liver damage, decrease in hemoglobin formation, infertility, mental retardation, chills, diarrhea, anemia, abnormalities in pregnant women and failure of central nervous system (Khan and Singh 2010;Martins et al 2004). Consequently, the treatment of effluents containing Pb(II) and Cd(II) is quite imperative.…”

Section: Introductionmentioning

confidence: 99%

Isotherm and kinetics modeling of Pb(II) and Cd(II) adsorptive uptake from aqueous solution by chemically modified green algal biomass

Khan

Mukhlif

Khan³

et al. 2016

Model. Earth Syst. Environ.

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In this study, the adsorption efficiency of epichlorohydrin modified fresh water green algal biomass was assessed for Pb(II) and Cd(II) uptake from aqueous solution. The process parameters such as contact time, dose, initial metal concentration, solution pH and temperature were optimized. The Langmuir, Freundlich, Temkin and Dubnin-Redushkevich isotherm model was applied to the equilibrium data, which best fitted the Langmuir isotherm indicating homogenous distribution of adsorption sites. The monolayer adsorption capacity was 100.00 for Pb (II) and 72.46 mg/g for Cd(II) adsorption. The kinetic data was best described by pseudo-second order model, with intraparticle and liquid film diffusion controlled mechanism. The negative values of Gibbs free energy change (ΔG º ) and positive enthalpy change (ΔH º ) showed that adsorption process was spontaneous and endothermic. The functional groups, surface morphology and elemental composition of adsorbent, before and after adsorption, was evaluated using FTIR spectra, SEM and EDS studies. The study revealed that the modified algal biomass can effectively and efficiently remove the title metal ions from aqueous solution.

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Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: effect of temperature, pH and water hardness

Cited by 248 publications

References 30 publications

Sorption of heavy metals from aqueous solution by dehydrated powders of aquatic plants

Sorption of heavy metals from aqueous solution by dehydrated powders of aquatic plants

Cadmium uptake by algal biomass in batch and continuous (CSTR and packed bed column) adsorbers

Isotherm and kinetics modeling of Pb(II) and Cd(II) adsorptive uptake from aqueous solution by chemically modified green algal biomass

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