Arsenic (V) adsorption from aqueous solution onto goethite, hematite, magnetite and zero-valent iron: Effects of pH, concentration and reversibility

Mamindy-Pajany, Yannick; Hurel, Charlotte; Marmier, Nicolas; Roméo, Michèle

doi:10.1016/j.desal.2011.07.046

Cited by 249 publications

(99 citation statements)

References 43 publications

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“…It could be deduced that the positively charged schwertmannite [the point of zero charge (pH pzc ) of schwertmannite was 7.2 (Jönsson et al 2005)] could easily adsorb H 2 AsO 4 -at low pH, while having a low sorption capacity of HAsO 4 2-and AsO 4 3-at high pH. The effect of pH on the sorption of As(V) to goethite, hematite and magnetite also showed similar tendency with steady sorption capacity under acid condition and significant decrease under alkalic condition (Mamindy-Pajany et al 2011). …”

Section: Sorption Of As(v) and As(iii) On Schwertmannitementioning

confidence: 69%

“…Previous studies showed that sulfate could cause a decrease of 5 % in As(V) sorption on hematite (Youngran et al 2007). Chloride could cause As(V) sorption decrease in 24, 10 and 8 % on magnetite, hematite, and goethite, respectively (Mamindy-Pajany et al 2011). These coexisting anions did not have significant effects on the and arsenic of 100 mg L -1 Fig.…”

Section: Sorption Of As(v) and As(iii) On Schwertmannitementioning

confidence: 99%

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Application of a high-surface-area schwertmannite in the removal of arsenate and arsenite

Song

Jia

Ren

et al. 2014

Int. J. Environ. Sci. Technol.

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Schwertmannite is a poorly crystalline Fe(III) hydroxide, which always shows high sorption capacities to pollutants. In this study, schwertmannite synthesized from the Fe 3? hydrolyzation method showed a hedgehog-like shape, with a specific surface area of 325.5 m 2 g -1 , which was much higher than that of the sphere-like schwertmannite synthesized from the Fe 2? oxidation method, with a specific surface area of 48.2 m 2 g -1 . The former was then used to evaluate its sorption performance to As(V) and As(III). Sorption of As(V) and As(III) could reach equilibrium in 200 min, and the maximum sorption capacities of As(V) and As(III) were 182.86 and 45.50 mg g -1 at pH 3.0, respectively, and 143.25 and 217.85 mg g -1 at pH 7.0, respectively. Sorption capacity was dependent on pH and more As(V) adsorbed on schwertmannite at lower pH, while As(III) sorption increased with the increase of pH. Our results also indicated that the presence of sulfate reduced the sorption of As(V) from 85.4 to 67.6 mg g -1 as sulfate concentration increased from 0.2 to 6 g L -1 , while such an effect was not apparent in As(III) sorption. Nitrate and chloride did not show significant interference on the sorption of both As(V) and As(III). Schwertmannite showed better repeated uses in the removal of As(V) and As(III) after seven repeated using cycles with removal percentages of 95.3 % at pH 3.0 and 63.9 % at pH 7.0 to As(V), and 31.0 % at pH 3.0 and 81.6 % at pH 7.0 to As(III).

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Section: Sorption Of As(v) and As(iii) On Schwertmannitementioning

confidence: 69%

Section: Sorption Of As(v) and As(iii) On Schwertmannitementioning

confidence: 99%

Application of a high-surface-area schwertmannite in the removal of arsenate and arsenite

Song

Jia

Ren

et al. 2014

Int. J. Environ. Sci. Technol.

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“…However, hematite was reported to be the appropriate adsorbent for As(V) removal in natural medium because it can exist at a wide pH range [99]. Mamindy-Pajany et al [121] observed a similar trend on As(V) adsorption by hematite but, for As(III), the adsorption was highly dependent on initial pH, and a decrease in adsorption was observed at the pH value of 3.…”

Section: Effects Of Ph On Arsenic Removalmentioning

confidence: 71%

A Comparative Study on Removal of Hazardous Anions from Water by Adsorption: A Review

John

David

Mmereki

2018

International Journal of Chemical Engineering

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This paper presents a comparative review of arsenite (As(III)), arsenate (As(V)), and fluoride (F − ) for a better understanding of the conditions and factors during their adsorption with focus on (i) the isotherm adsorption models, (ii) effects of pH, (iii) effects of ionic strength, and (iv) effects of coexisting substances such as anions, cations, and natural organics matter. It provides an indepth analysis of various methods of arsenite (As(III)), arsenate (As(V)), and fluoride (F − ) removal by adsorption and the anions' characteristics during the adsorption process. The surface area of the adsorbents does not contribute to the adsorption capacity of these anions but rather a combination of other physical and chemical properties. The adsorption capacity for the anions depends on the combination of all the factors: pH, ionic strength, coexisting substances, pore volume and particles size, surface modification, pretreatment of the adsorbents, and so forth. Extreme higher adsorption capacity can be obtained by the modification of the adsorbents. In general, pH has a greater influence on adsorption capacity at large, since it affects the ionic strength, coexisting anions such as bicarbonate, sulfate, and silica, the surface charges of the adsorbents, and the ionic species which can be present in the solution.

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“…Even though the amorphous Fe concentrations in the two tailings were similar, As (V) adsorption could occur on the surfaces of magnetite particles, even though the affinity of magnetite for As is lower than those of the amorphous iron minerals (Giménez et al 2007;Mamindy-Pajany et al 2011). These changes in Assorbing Fe mineral forms and total adsorption capacity have bearings on the distribution and solubility of As in the Cu-tailings after the recovery of magnetite.…”

Section: Relationship Between Property Changes Induced By Magnetite Rmentioning

confidence: 98%

“…Although the direct As adsorption capacity of magnetite is weaker than amorphous Fe-oxides and oxyhydroxides (Giménez et al 2007;Mamindy-Pajany et al 2011), the combination of magnetite particle surface area and the resultant amorphous Fe-minerals deposited on the particle surface can greatly enhance As-adsorption capacity in the tailings. As a result, the surface modification of magnetite particles through Fe-dissolution and precipitation of amorphous Fe minerals may be a critical mechanism in the regulatory role of magnetite in As adsorption and distribution in the Cu-tailings under revegetation ( Figure 5-1 (1)).…”

Section: Major Differences In As Fractionation Between Lm and Hm Cu Tmentioning

confidence: 99%

Effects of magnetite removal on the distribution and speciation of Arsenic in copper tailings and its accumulation in native grass

Liu¹

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Arsenic (As) is considered a significant pollutant in neutral-alkaline copper (Cu) tailings, which may be transported off site via seepage and/or runoff from tailings storage facilities. Iron (Fe) oxides and oxyhydroxides, with their high specific surface area and As affinity, play an important role adsorbing inorganic As in contaminated soil and water. In addition, organic matter (OM) and the resulting organic molecules can not only directly influence As chemical forms through competing functional groups of OM (such as phenolic, carboxyl, hydroxyls, etc.), but OM can also catalyse the transformation of Fe-primary minerals into secondary minerals such as Feoxyhydroxides via microbe-mediated processes. At the Ernest Henry Mine (North Queensland, EHM), the Cu ore processing circuit has recently been modified to recover magnetite (Fe 3 O 4 ) from tailings, which could reduce magnetite concentration in the tailings from 20-30% to as low as 3-5%. However the environmental risks of As mobility in the low magnetite (LM) tailings are yet to be investigated.The present study aimed to investigate the effects of magnetite removal and direct revegetation treatments on As distribution, solubility, and speciation in relation to plant As accumulation in the Cu-tailings. It is hypothesized that the distribution of As into exchangeable and soluble forms may be increased in the low magnetite (LM) tailings, due to the much reduced As adsorption capacity associated with the magnetite and the resultant Fe-oxyhydroxides coating on the surfaces of magnetite following redox processes. In addition, the increased distribution of As into the pore water of the LM tailings may favour As conversion from the inorganic into the organic forms under organic matter amendment and direct revegetation with native grass species. Both LM and high magnetite (HM) tailings were amended with 5% sugarcane residues as a basal treatment to ensure plant survival, in combination with 0, 1 and 5% pine-biochar, in which native grass Red Flinders (Iseilema Vaginiflorum) plants were grown for 4 weeks under glasshouse conditions. Arsenic distribution in the LM and HM tailings was fractionated before and after direct revegetation treatments.The intrinsic As adsorption capacity in the HM tailings was significantly higher than that in the LM. Following the organic matter and direct revegetation treatments, As distribution in the specifically adsorbed and amorphous Fe oxyhydroxide increased in the LM tailings but declined in the HM tailings, compared to the unamended tailings. Total As concentration in the pore water of LM tailings increased by 6-7 fold compared to those in the HM tailings. In the amended and revegetated tailings treatments, As concentrations in the pore water of the LM tailings were significantly elevated compared to those in the HM. The proportion of inorganic As species in the pore water of the LM tailings was approximately 50% higher than those in the HM.After 4 weeks of treatment, the native grass accumulated up to 137 mg kg -1 As in th...

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Arsenic (V) adsorption from aqueous solution onto goethite, hematite, magnetite and zero-valent iron: Effects of pH, concentration and reversibility

Cited by 249 publications

References 43 publications

Application of a high-surface-area schwertmannite in the removal of arsenate and arsenite

Application of a high-surface-area schwertmannite in the removal of arsenate and arsenite

A Comparative Study on Removal of Hazardous Anions from Water by Adsorption: A Review

Effects of magnetite removal on the distribution and speciation of Arsenic in copper tailings and its accumulation in native grass

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