Vanadium removal by metal (hydr)oxide adsorbents

Akhtar, Naeem; Westerhoff, Paul; Mustafa, S.

doi:10.1016/j.watres.2007.01.002

Cited by 297 publications

(147 citation statements)

References 18 publications

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“…The positive correlation between As and Fe was expected, since it is well established that the presence of Fe particles and colloids strongly determines As concentrations at neutral pH and oxic conditions (Gupta and Chen, 1978;Rothwell et al, 2009;Smedley and Kinniburgh, 2002). Laboratory experiments have shown that vanadate also adsorbs strongly to Fe oxides (Blackmore et al, 1996;Naeem et al, 2007) and V has also been found to be associated with an Fe carrier phase in natural water (Dahlqvist et al, 2007).…”

Section: Relationships Between Dissolved As/v and Water Chemistrymentioning

confidence: 83%

“…Vanadium is also the major trace metal in petroleum products and is thus emitted to the atmosphere when fossil fuels are burned (Jacks, 1976). Vanadium occurs as V(III), V(IV) and V(V) in aqueous solution, where V(V), vanadate, is stable in oxic water (Naeem et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Vanadate, like arsenate, is strongly adsorbed to Fe oxides (Blackmore et al, 1996;Naeem et al, 2007) and possibly also other metal oxides. This implies that changes in the concentrations of particulate or colloidal Fe may influence the concentrations of As and V in surface waters.…”

Section: Introductionmentioning

confidence: 99%

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Increasing concentrations of arsenic and vanadium in (southern) Swedish streams

Wällstedt

Björkvald

Gustafsson

2010

Applied Geochemistry

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The aim of this study was to investigate temporal trends and controlling factors of As and V in running waters throughout Sweden. For this purpose, data on stream water chemistry from 62 streams of varying catchment size and characteristics, included in the Swedish environmental monitoring programmes were evaluated. The geochemical software Visual MINTEQ was used to model the speciation and trend analyses were performed on total concentrations of As and V as well as modelled fractions (dissolved species as well as arsenate and vanadate adsorbed to ferrihydrite). The trend analyses showed increasing total concentrations of As and V in southern Sweden. Concentrations of As and V correlated significantly to Fe concentrations in 59 and 60 of the 62 streams respectively, indicating that Fe is an important determining factor for As and V concentrations in Swedish streams. This was confirmed by the geochemical modelling that indicated that the adsorbed fraction is the dominant form of As and V and that the concentrations of As and V in Swedish streams are thus highly determined by concentrations of colloidal or particulate Fe. It is therefore suggested that the increasing trends of As and V are to a large extent due to increasing concentrations of colloidal Fe, which is stabilised by increasing concentrations of DOC. Further the geochemical modelling indicates that the dissolved fraction of As and V generally is small, with the exception of a few streams with high pH and/or phosphate concentrations.

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Section: Relationships Between Dissolved As/v and Water Chemistrymentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

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Increasing concentrations of arsenic and vanadium in (southern) Swedish streams

Wällstedt

Björkvald

Gustafsson

2010

Applied Geochemistry

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“…Of these heavy metals, vanadium has recently received more attention because of its adverse effect on human health and the environment. At high concentration vanadium is an environmentally harmful substance and causes diverse toxic effects on humans such as anaemia, cough, emaciation, and irritation of mucous membrane, gastrointestinal disturbances, and bronchopneumonia [1], [2].…”

Section: Introductionmentioning

confidence: 99%

“…Materials such as ZnCl 2 active carbon [7], alumina, metal sludge [8], goethite [9], hydrotalcite [10] crystalline hydroxyl apatite, amine-functionalized -grafted tamarind fruits hell [2], chitosan [6], [11], persimmon tannin gel [12] and metal hydroxide [1] have been used as adsorbents for removal of vanadium (V) from aqueous solution. Because of its sorption capacity for numerous pollutants, its abundance and relatively low cost; clinoptilolite has been recognized as an efficient adsorbent for a large number of water treatment applications including removal of heavy metals form industrial wastewaters.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Zeolite-Polymer Composite as an Adsorbent for the Remediation of Wastewaters Containing Vanadium

Mthombeni¹,

Mbakop²,

Onyango³

2015

IJESD

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Abstract-Magnetic natural zeolite-polypyrrole composite was prepared for removal of vanadium from aqueous solution. The effects of initial pH, sorbent dosage, adsorption isotherms on removal efficiency were investigated. Up to 75% removal efficiency was obtained when the pH was 5 and the initial vanadium concentration was 100 mg/L. The isotherm data fitted well to the Langmuir isotherm model. The maximum adsorption capacity determined from the Langmuir isotherm was 57.803 mg/g at 25°C.

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Prevacid® (Lansoprazole)

Harrington¹

2010

Pharmaceutical Process Chemistry for Synthesis

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Vanadium removal by metal (hydr)oxide adsorbents

Cited by 297 publications

References 18 publications

Increasing concentrations of arsenic and vanadium in (southern) Swedish streams

Increasing concentrations of arsenic and vanadium in (southern) Swedish streams

Magnetic Zeolite-Polymer Composite as an Adsorbent for the Remediation of Wastewaters Containing Vanadium

Prevacid® (Lansoprazole)

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