Study of arsenic(V) adsorption on bone char from aqueous solution

Chen, Yunnen; Chai, Liyuan; Shu, Yu-de

doi:10.1016/j.jhazmat.2008.02.120

Cited by 138 publications

(74 citation statements)

References 25 publications

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“…The sorption capacity was observed to enhance from 40.8 to 98.5 % as the sorbent mass was increased from 2 to 7 g/l for As(III)-MLP system and from 49.6 to 94.8 %, the sorbent mass was increased from 2 to 6 g/l As(III)-RH system (Fig. 5) active sites (Chen et al 2008;Bozic et al 2009). Similar behaviour for the effect of sorbent concentrations on metal sorption capacity was observed and discussed in the literature for a variety of sorbents (Kumar et al 2006;Oliveira et al 2008;Saeed et al 2009).…”

Section: Effect Of Phmentioning

confidence: 95%

Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions

Kamsonlian

Suresh

Ramanaiah

et al. 2012

Int. J. Environ. Sci. Technol.

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The present study deals with the biosorption of As(III) from aqueous solution using mango leaves powder (MLP) and rice husk (RH) in a batch operation. Scanning electron microscopy and Fourier transformation infrared spectrometry analysis shows the surface texture of biosorbents and metal binding of functional groups of before and after biosorption of As(III). The optimum pH was obtained at 7 and 6 with 7 and 6 g/l of dosage of MLP and RH, respectively. The adsorption of As(III) onto MLP and RH was favourably influenced by an increase in temperature. Equilibrium data were well represented by the Freundlich isotherm model. Nitric acid and ethylenediaminetetra acetic acid was found to be a better eluant for the desorption followed by hydrochloric acid and sodium hydroxide of As(III) with a maximum desorption efficiency of 69.5, 48.5 and 79.4, 86.3 %, respectively. The pseudosecond-order kinetic model was found to best fitted of the experimental data over the equilibrium time at 32 h. The positive values of heat of adsorption (23.89 kJ/mol for MLP and 52.26 kJ/mol for RH) indicate the endothermic nature of the adsorption process. The thermodynamic study showed the spontaneous nature of the sorption of As(III) onto MLP and RH.

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Section: Effect Of Phmentioning

confidence: 95%

Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions

Kamsonlian

Suresh

Ramanaiah

et al. 2012

Int. J. Environ. Sci. Technol.

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“…For pentavalent arsenic, the corresponding stable species and pH values are: H 3 12.0-14.0) [3]. Therefore, different solution pH determined different As(V) removal efficiency.…”

Section: Effects Of Ph On Arsenic Removalmentioning

confidence: 99%

“…At present, many approaches such as adsorption, ion exchange, reverse osmosis, nanofiltration, coagulation (coprecipitation), membrane distillation, biological methods and photo catalytic oxidation are increasingly being used for the removal of arsenic from water body [2][3][4][5]. Coagulation (co-precipitation) and adsorption processes are most promising for aqueous arsenic removal because of the low cost and high efficiency, and are widely used in the developing world.…”

Section: Introductionmentioning

confidence: 99%

Arsenic removal from aqueous solution using ferrous based red mud sludge

Wang

Luan

et al. 2010

Journal of Hazardous Materials

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a b s t r a c tFerrous based red mud sludge (FRS) which combined the iron-arsenic co-precipitation and the high arsenic adsorption features was developed aimed at low arsenic water treatment in rural areas. Arsenic removal studies shown that FRS in dosage of 0.2 or 0.3 g/l can be used effectively to remove arsenic from aqueous solutions when initial As(V) concentration was 0.2 or 0.3 mg/l. Meanwhile, turbidity of supernatant in disturbing water was lower than 2 NTU after 24 h. The pH range (4.5-8.0) for FRS in effective arsenic removal was applicable in natural circumstance. Phosphate can greatly reduce the arsenic removal efficiency while the presence of carbonate had no significant effect on arsenic removal. Arsenic fractionation experiments showed that amorphous hydrous oxide-bound arsenic was the major components. When aqueous pH was decreased from 8.0 to 4.5, arsenic in FRS was not obviously released. The high arsenic uptake capability, good settlement performance and cost-effective characteristic of FRS make it potentially attractive material for the arsenic removal in rural areas.

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“…[11,12] Arsenate is isostructural and isoelectronic with phosphate, which may facilitate arsenic(V) removal from water and wastewater using hydroxylapatite. [13] The existing literature confirms the occurrence of this substitution reaction spread over the entire compositional range and can be utilised to throw light on its mechanism to arrive at the possibility of removal of incorporated arsenic. [2] Arsenic sequestration by compound formation produces a low-solubility apatite-like structure of the general form Ca 10 (As x P y O 4 ) 6 (OH) 2 .…”

Section: Introductionmentioning

confidence: 82%

Dissolution and solubility of the arsenate - phosphate hydroxylapatite solid solution [Ca5(PxAs1 - xO4)3(OH)] at 25°C

et al. 2011

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Environmental context. Apatites form a large family of minerals and compounds that can incorporate a variety of ions, including arsenate that can substitute for phosphate. Apatites may therefore control the concentration of arsenic in some aqueous environments. This manuscript describes the synthesis and characterisation of the arsenate-phosphate hydroxylapatite solid solution and the solid solution-aqueous solution interaction.Abstract. Nine different members of the arsenate-phosphate hydroxylapatite solid solution [Ca 5 (P x As 1Àx O 4 ) 3 (OH)] were prepared and characterised by various techniques, and then dissolution of the synthetic solids was studied at 258C and pH 2 in a series of batch experiments. The concentrations of aqueous arsenate species increased rapidly at the beginning of the dissolution and reached a steady-state after 480 h. The concentrations of aqueous phosphate species increased very fast initially and reached a peak value within the first hour of dissolution and then declined slowly with time and remained constant after 240-360 h. The solubility of the Ca 5 (P x As 1Àx O 4 ) 3 (OH) solid solution increased and its stability decreased with an increase in the mole fraction of Ca 5 (AsO 4 ) 3 (OH). The dissolution followed or slightly overshot the Lippmann solutus curve, then approached the solutus curve. The Ca 5 (AsO 4 ) 3 (OH)-poor solid solution was in equilibrium with the arsenate-rich aqueous solution.

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Study of arsenic(V) adsorption on bone char from aqueous solution

Cited by 138 publications

References 25 publications

Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions

Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions

Arsenic removal from aqueous solution using ferrous based red mud sludge

Dissolution and solubility of the arsenate - phosphate hydroxylapatite solid solution [Ca5(PxAs1 - xO4)3(OH)] at 25°C

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