Oxidation and sorption of arsenite by manganese dioxide as influenced by surface coatings of iron and aluminum oxides and calcium carbonate

Oscarson, D. W.; Huang, P. M.; Hammer, U. T.; Liaw, W. K.

doi:10.1007/bf00279633

Cited by 89 publications

(38 citation statements)

References 19 publications

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“…However, their adsorption capacities for both As(III) and As(V) are very low. Besides, synthetic Fe oxide-coated MnO 2 (Oscarson et al, 1983) has also been studied for the oxidation and sorption of As(III), but its As(III) adsorption capacity was lower than that of pure Fe oxide since MnO 2 was coated by Fe oxide and could hardly oxide As(III).…”

Section: Article In Pressmentioning

confidence: 99%

Preparation and evaluation of a novel Fe–Mn binary oxide adsorbent for effective arsenite removal

et al. 2007

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Adsorbent OxidationArsenite Removal a b s t r a c t Arsenite (As(III)) is more toxic and more difficult to remove from water than arsenate (As(V)).As there is no simple treatment for the efficient removal of As(III), an oxidation step is always necessary to achieve higher removal. However, this leads to a complicated operation and is not cost-effective. To overcome these disadvantage, a novel Fe-Mn binary oxide material which combined the oxidation property of manganese dioxide and the high adsorption features to As(V) of iron oxides, were developed from low cost materials using a simultaneous oxidation and coprecipitation method. The adsorbent was characterized by BET surface areas measurement, powder XRD, SEM, and XPS. The results showed that prepared Fe-Mn binary oxide with a high surface area ð265 m 2 g À1 Þ was amorphous. Iron and manganese existed mainly in the oxidation state þIII and IV, respectively. Laboratory experiments were carried out to investigate adsorption kinetics, adsorption capacity of the adsorbent and the effect of solution pH values on arsenic removal. Batch experimental results showed that the adsorbent could completely oxidize As(III) to As(V) and was effective for both As(V) and As(III) removal, particularly the As(III). The maximal adsorption capacities of As(V) and As(III) were 0:93 mmol g À1 and 1:77 mmol g À1 , respectively. The results compare favorably with those obtained using other adsorbent. The effects of anions such as SO 2À 4 , PO 3À 4 , SiO and humic acid (HA), which possibly exist in natural water, on As(III) removal were also investigated. The results indicated that phosphate was the greatest competitor with arsenic for adsorptive sites on the adsorbent. The presence of sulfate and HA had no significant effect on arsenic removal. The high uptake capability of the Fe-Mn binary oxide makes it potentially attractive adsorbent for the removal of As(III) from aqueous solution.

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Section: Article In Pressmentioning

confidence: 99%

Preparation and evaluation of a novel Fe–Mn binary oxide adsorbent for effective arsenite removal

et al. 2007

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“…The composite adsorbent had a markedly higher arsenic removal capacity than that of manganese dioxide. Besides, synthetic Fe oxide-coated MnO 2 (Oscarson et al, 1983) has also been studied for the oxidation and sorption of As(III), but its As(III) adsorption capacity was lower than that of pure Fe oxide since MnO 2 was coated by Fe oxide and could hardly oxidize As(III).…”

Section: Mno 2 -Based Composite Adsorbentsmentioning

confidence: 99%

Research progress of novel adsorption processes in water purification: A review

2008

Journal of Environmental Sciences

376

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As an effective, efficient, and economic approach for water purification, adsorbents and adsorption processes have been widely studied and applied in different aspects for a long time. In the recent years, a lot of novel adsorption processes have been developed for enhancing the efficiency of removing the organic and inorganic contaminants from water. This article reviews some new adsorbents and advanced adsorption methods that specialize in their compositions, structures, functions, and characteristics used in water treatment. The review emphasizes adsorption/catalytic oxidation process, adsorption/catalytic reduction process, adsorption coupled with redox process, biomimetic sorbent and its sorption behaviors of POPs, and modified adsorbents and their water purification efficiency.

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“…Much work has been devoted to the study of arsenate adsorption on individual soil minerals, for example on iron oxides (Pierce and Moore, 1982;Fendorf et al, 1997), aluminium oxides (Anderson et al, 1975;Xu et al, 1991), manganese oxides (Oscarson et al, 1983), phyllosilicate clay minerals (Frost and Griffin, 1977;Goldberg and Glaubig, 1988), and on calcium carbonate (Goldberg and Glaubig, 1988). However, although there are some studies of arsenate adsorption on intact soils (e.g.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of arsenate on soils. Part 1: Laboratory batch experiments using 16 Chinese soils with different physiochemical properties

Jiang

Zhang

Shan

et al. 2005

Environmental Pollution

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The Langmuir two-surface equation fits arsenate adsorption onto soils. AbstractLaboratory batch experiments were carried out to study the adsorption of arsenate on 16 Chinese soils with different physicochemical properties. Wide differences in arsenate adsorption were observed, and the Jiangxi and Hubei soils were more effective sorbents for arsenate than other soils. The Langmuir one-surface and two-surface equations were used to model the arsenate adsorption data. Except for the Jiangxi and Hubei soils, the Langmuir one-surface equation gave reasonably good fits to the arsenate adsorption data. However, the Langmuir two-surface equation generally provided a better fit than the Langmuir onesurface equation. For soils with relative high organic matter (OM), dissolved organic carbon (DOC) or extractable phosphate, the Langmuir one-surface and two-surface equations described the adsorption isotherms similarly. In contrast, for soils with relatively low contents of OM, DOC or extractable phosphate, the Langmuir two-surface equation gave the better fit to the arsenate adsorption data.

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Oxidation and sorption of arsenite by manganese dioxide as influenced by surface coatings of iron and aluminum oxides and calcium carbonate

Cited by 89 publications

References 19 publications

Preparation and evaluation of a novel Fe–Mn binary oxide adsorbent for effective arsenite removal

Preparation and evaluation of a novel Fe–Mn binary oxide adsorbent for effective arsenite removal

Research progress of novel adsorption processes in water purification: A review

Adsorption of arsenate on soils. Part 1: Laboratory batch experiments using 16 Chinese soils with different physiochemical properties

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