A study on arsenic adsorption on polymetallic sea nodule in aqueous medium

Maity, Sourav; Chakravarty, Sanchita; Bhattacharjee, S.; Roy, B. C.

doi:10.1016/j.watres.2005.04.054

Cited by 91 publications

(45 citation statements)

References 44 publications

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“…Adsorption has become a preferred method for removal, recovery and recycling of toxic heavy metals from wastewater (Chang et al, 2002). Different conventional and non-conventional type of adsorbents have been tried for removal of various metal ions, viz., red mud (Gupta et al, 2001), activated carbon (Ramos et al, 2002), tree fern , coconut coirpith (Kadirvelu and Namasivayam, 2003), sewage sludge (Pan et al, 2003), sawdust (Yu et al, 2003), silica (Chiron et al, 2003), bone char (Ko et al, 2004), rice husk (Tarley et al, 2004), polymetallic sea nodule (Maity et al, 2005), modified zeolite (Wingenfelder et al, 2005), etc.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Fe(III) from water by natural and acid activated clays: Studies on equilibrium isotherm, kinetics and thermodynamics of interactions

Bhattacharyya

Gupta²

2006

Adsorption

104

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The present work investigates the removal of Fe(III) ions from an aqueous solution by kaolinite, montmorillonite and their acid activated forms. The specific surface areas of kaolinite, acid activated kaolinite, montmorillonite and acid activated montmorillonite were 3.8, 15.6, 19.8 and 52.3 m 2 /g respectively whereas the cation exchange capacity (CEC) was measured as 11.3, 12.2, 153.0, and 341.0 meq/100 g for four clay adsorbents respectively. Adsorption increased with pH till Fe(III) became insoluble at pH > 4.0. The kinetics of the interactions is not certain, but the second order kinetics (k 2 = 4.7 × 10 −2 to 7.4 × 10 −2 g mg −1 min −1 ) appears to give a better description. Langmuir and Freundlich isotherms were applied and isotherm coefficients were computed. The Langmuir monolayer capacity of the clay adsorbents was from 11.2 to 30.0 mg g −1 . The process was exothermic with H in the range of −27.6 to −42.2 kJ mol −1 accompanied by decrease in entropy ( S = −86.6 to −131.8 J mol −1 K −1 ) and decrease in Gibbs energy. The results have shown that kaolinite, montmorillonite and their acid activated forms could be used as adsorbents for separation of Fe(III) from aqueous solution. Acid activation enhanced the adsorption capacity compared to the untreated clay minerals.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Fe(III) from water by natural and acid activated clays: Studies on equilibrium isotherm, kinetics and thermodynamics of interactions

Bhattacharyya

Gupta²

2006

Adsorption

104

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“…The biosorption process includes a fast and reversible reaction through the passive and physicochemical binding of metal ions to bacteria, such as an ion exchange reaction with no requirements for bacterial activity (Kim and Kang 2006). Biosorption of As has been investigated recently, and the results demonstrate that biomass represents an efficient and economic sorbent for the removal of As from aqueous solutions (Loukidou et al 2003;Maity et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Enhancement of As(V) adsorption onto activated sludge by methylation treatment

Kang

Kim

2007

Environ Geochem Health

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Biosorption properties of arsenate [As(V)] onto activated sludge were investigated in batch systems. The adsorption of As(V) onto sludge increased from 23 to 266 microg/g dry weight through the methylation of the activated sludge. This increase resulted from neutralization of carboxylic groups via the methylation process. The pH effect of As(V) uptake was also investigated and As(V) adsorption by methylated sludge decreased significantly at high pH (pH > 11) due to competition between As(V) and OH(-) ions for binding sites distributed on sludge surfaces. In contrast, low pH favored As(V) adsorption by methylated sludge because of the elevated quantities of positively charged functional groups. The results suggest that methylated activated sludge may provide promising applications for the simultaneous removal and separation of As(V) from aqueous effluents.

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“…The new arsenic standard for drinking water will require thousands of drinking water systems to install arsenic removal treatment processes or modify their existing treatment to meet the new standard. Most of the current arsenic treatment strategies are iron and aluminium-based (e.g., coagulation with iron and aluminium salts, iron removal, iron-based adsorption media) due to the well known adsorptive properties of iron and aluminium oxide surfaces toward arsenic (Lenoble et al, 2002;Bose and Sharma, 2002;Altundogan et al, 2002;Hsia et al, 1994;Goldberg et al, 2005;Carrillo and Drever, 1998;Quaghebeur et al, 2005;Katsoyiannis and Zouboulis, 2002;Lorenzen et al, 1995;Maity et al, 2005;Sun and Doner, 1998;Violante and Pigna, 2002;Lin and Wu, 2001;Matis et al, 1997Matis et al, ,1999Elizalde-Gonzalez et al, 2001;Ladeira and Ciminelli, 2004;Ouvard et al, 2005;Daus et al, 2004;Leist and Caridi, 2000;Zhang and Selim, 2005;Benjamin et al, 1996;Wilkie and Hering, 1996;Meng et al, 2005;Manning et al, 1998;Bowell, 1994;Anderson et al, 1976;Darland and Inskeep, 1997a;Driehaus et al, 1998;Fuller and Davis, 1989;Fuller et al, 1993;Ghosh and Yuan, 1987;Harley et al, 2004;Jain et al, 1999;Lin and Wu, 2001;Lin a...…”

Section: Introductionmentioning

confidence: 99%

Desorption of arsenic from drinking water distribution system solids

Copeland

Lytle

Dionysious

2006

Environ Monit Assess

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Previous work has shown that arsenic can accumulate in drinking water distribution system (DWDS) solids (Lytle et al., 2004) when arsenic is present in the water. The release of arsenic back into the water through particulate transport and/or chemical release (e.g. desorption, dissolution) could result in elevated arsenic levels at the consumers' tap. The primary objective of this work was to examine the impact of pH and orthophosphate on the chemical release (i.e. desorption) of arsenic from nine DWDS solids collected from utilities located in the Midwest. Arsenic release comparisons were based on the examination of arsenic and other water quality parameters in leach water after contact with the solids over the course of 168~hours. Results showed that arsenic was released from solids and suggested that arsenic release was a result of desorption rather than dissolution. Arsenic release generally increased with increasing initial arsenic concentration in the solid and increasing pH levels (in the test range of 7 to 9). Finally, orthophosphate (3 and 5 mg PO(4)/L) increased arsenic release at all pH values examined. Based on the study results, utilities with measurable levels of arsenic present in their water should be aware that some water quality changes can cause arsenic release in the DWDS potentially resulting in elevated levels at the consumer's tap.

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A study on arsenic adsorption on polymetallic sea nodule in aqueous medium

Cited by 91 publications

References 44 publications

Adsorption of Fe(III) from water by natural and acid activated clays: Studies on equilibrium isotherm, kinetics and thermodynamics of interactions

Adsorption of Fe(III) from water by natural and acid activated clays: Studies on equilibrium isotherm, kinetics and thermodynamics of interactions

Enhancement of As(V) adsorption onto activated sludge by methylation treatment

Desorption of arsenic from drinking water distribution system solids

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