Removal of Arsenic in Aqueous Solutions by Adsorption onto Waste Rice Husk

Amin, Nurul; Kaneco, Satoshi; Kitagawa, Taichi; Begum, Anwara; Katsumata, Hideyuki; Suzuki, Tohru; Ohta, Kouji

doi:10.1021/ie060344j

Cited by 192 publications

(72 citation statements)

References 41 publications

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“…The filtrate was collected and subjected for arsenic estimation using the SDDC method. The arsenic concentrations before and after adsorption were recorded, and then the percent arsenic adsorption (removal) by the adsorbent was computed using (Kumari et al 2005;Amin et al 2006;Das and Mondal 2011;Srivastava et al 2012) the equation.…”

Section: Characterization Of Adsorbentmentioning

confidence: 99%

“…In groundwater, arsenic is typically present in one of two oxidation states: arsenite (H 3 AsO 3 , H 2 AsO 3 -or HAsO 3 2-) and arsenate (H 3 AsO 4 , H 2 AsO 4 -, HAsO 4 2-or AsO 4 3-) (Kumari et al 2005) of which arsenite [As(III)] is 10 times more toxic than arsenate [As(V)] (Wasiuddin et al 2002;Amin et al 2006) due to greater combining affinity with the thiol (-SH) part (Teixeira and Ciminelli 2005) of the protein via soft-soft acid-base interaction (Gregus et al 2009). However, at the low arsenic concentrations found in drinking water even before treatment, As(V) is instantly converted on ingestion into As(III), and the toxicity of dissolved arsenic is therefore in practice independent of oxidation state.…”

Section: Introductionmentioning

confidence: 99%

“…In West Bengal, arsenic species in contaminated drinking water were found to be arsenate and arsenite in 1:1 ratio . Arsenate is typically present in the mono and divalent anionic forms at neutral pH while arsenite occurs primarily in the groundwater (Amin et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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Removal of arsenic(III) and arsenic(V) on chemically modified low-cost adsorbent: batch and column operations

et al. 2013

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Batch and column operations were performed utilizing thioglycolated sugarcane carbon (TSCC), a lowcost adsorbent, to remove As(III) and As(V) from aqueous systems. Under optimized batch conditions, the TSCC could remove up to 92.7 and 91.4 % for As(III) and As(V), respectively. An artificial neural network model showed the validity of TSCC as a preferable adsorbent for arsenic [As(III) and As(V)] removal in batch studies. In column operations, removal efficiency increases with increase in influent arsenic concentration and adsorbent dose and decreases with increase in flow rate. At an adsorbent dose of 6.0 g, flow rate 3.0 mL min -1 , and initial arsenic concentration 1,500 lg L -1 , the arsenic uptake capacity of TSCC for As(III) and As(V) was found to be 85.01 and 83.82 lg g -1 , respectively. The Thomas model was used to analyze the column experimental data. Results from the column operations indicated that the adsorption behavior of arsenic [As(III) and As(V)] fits exceptionally well with the Thomas model with high correlation coefficient and very low standard error. Examinations of scanning electron microscopy and FTIR spectroscopy reveal that high arsenic adsorption favors surface complexation on the adsorbent surface.

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Section: Characterization Of Adsorbentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Removal of arsenic(III) and arsenic(V) on chemically modified low-cost adsorbent: batch and column operations

et al. 2013

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“…Various industries produce and discharge wastes containing different heavy metals into the environment, such as mining and chemicals processing units, surface finishing industry, energy and fuel production, fertilizer and pesticide industry and application, metallurgy, iron and steel, electroplating, electrolysis, electro-osmosis, leather working, photography, electric appliance manufacturing, metal surface treating, aerospace and atomic energy installation Sha et al 2010;Wang et al 2009;Wei et al 2009). Arsenic contamination is one of the most challenging environmental problems (Amin et al 2006). Millions of people worldwide are exposed to high concentration of arsenic from groundwater, which the source of drinking water.…”

Section: Introductionmentioning

confidence: 99%

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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“…Before adding coagulant, an oxidation step is performed by the addition of chemical reagents such as potassium permanganate, chlorine, ozone, hydrogen peroxide, or manganese oxide (AMIn et al, 2006). At pH 7 and for a 100 mg•L -1 to 125 mg•L -1 dose of alum, the removal efficiency of arsenic and iron is around 82 to 86% and 92 to 95% respectively and the optimum removal of arsenic and iron is around 90 to 93% and 97 to 100% respectively at pH 7 for a 200 mg•L -1 of ferric chloride salt (kHAn et al, 2002).…”

Section: Coagulationmentioning

confidence: 99%

Arsenic mitigation measures in Bangladesh

Khan¹

2012

rseau

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The scale of arsenic toxicity of the groundwater in Bangladesh is greater than any environmental debacle in the history of human civilization. The main route of arsenic accumulation in the human body is the ingestion of arsenic tainted water. Because of the undetectable nature of arsenic poisoning at the early stage and lack of awareness due to mass illiteracy, poverty and malnutrition, arsenic related ailments may cause death. However, this paper mainly discusses arsenic mitigation measures in Bangladesh. Although a piped surface water supply after treatment is the absolute solution to get rid of this crisis, the weak economic background of Bangladesh does not support supplying such water to every corner of rural areas. Hence research groups have developed their own methods to suit the local environment, using locally available materials and approaches based on the common method of arsenic removal: use of oxidizing agents, followed by flocculation and precipitation. Again, among different alternative water supply options, deep tubewells, which have been used by the communities in Bangladesh during the past few decades, appear to be a more suitable alternate option. Moreover, household-based arsenic filters can be a good choice if proper maintenance can be done.L’accroissement du problème de toxicité causé par l’arsenic au Bangladesh constitue une catastrophe environnementale majeure dans l’histoire de l’humanité. La principale voie d’accumulation de l’arsenic dans le corps humain est l’ingestion d’eau polluée par ce contaminant. La nature indétectable de l’empoisonnement à l’arsenic dans les premières étapes, l’insuffisance d’avertissement attribuable à l’analphabétisme, ainsi qu’à la pauvreté et la malnutrition, font en sorte que l’empoisonnement progressif à l’arsenic peut causer la mort. Le présent article discute toutefois les mesures d’atténuation envisagées au Bangladesh. Ainsi, bien que l’alimentation dans des conduites avec de l’eau de surface traitée représente la solution idéale pour résoudre cette crise, l’état économique précaire du Bangladesh ne permet pas d’alimenter en eau de surface traitée toutes les populations des zones rurales. De là, des groupes de recherche ont développé des méthodes spécifiques à l’environnement local en utilisant des matériaux disponibles sur place et basées sur une méthode établie d’enlèvement de l’arsenic : en utilisant des agents oxydants suivi par la floculation et la précipitation. Parmi les différentes alternatives d’alimentation en eau explorées, la technique de puits profonds, laquelle a été utilisée par les communautés au Bangladesh durant les décennies passées, apparaît être l’option la plus appropriée. De plus, l’emploi d’unités de filtration dans les résidences peut être un bon choix, dans les cas où celles-ci sont entretenues adéquatement

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Removal of Arsenic in Aqueous Solutions by Adsorption onto Waste Rice Husk

Cited by 192 publications

References 41 publications

Removal of arsenic(III) and arsenic(V) on chemically modified low-cost adsorbent: batch and column operations

Removal of arsenic(III) and arsenic(V) on chemically modified low-cost adsorbent: batch and column operations

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

Arsenic mitigation measures in Bangladesh

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