Removal of As(III) and As(V) from water using a natural Fe and Mn enriched sample

Deschamps, Eleonora; Ciminelli, Virgínia S. T.; Höll, Wolfgang H.

doi:10.1016/j.watres.2005.10.007

Cited by 173 publications

(78 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Two natural Fe-Mn-mineral materials (Chakravarty et al, 2002;Deschamps et al, 2005) whose main components are Fe 2 O 3 and MnO 2 , have been investigated for As(III) and As(V) removal from water and both of them are more effective for As(III) removal than that of As(V). However, their adsorption capacities for both As(III) and As(V) are very low.…”

Section: Article In Pressmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2007

View full text Add to dashboard Cite

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.

show abstract

Section: Article In Pressmentioning

confidence: 99%

“…Therefore, something else must occur when As(III) was oxidized to As(V). It was suggested that fresh adsorption sites for arsenic adsorption were created at the solid surface during As(III) oxidation (Deschamps et al, 2005), resulting in an increase of formed As(V) removal.…”

Section: Adsorption Capacity Of Fe-mn Adsorbentmentioning

confidence: 99%

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

et al. 2007

View full text Add to dashboard Cite

show abstract

“…Besides, traditional oxidants such as chlorine, ozone, and hydrogen peroxide are not feasible for a specific oxidation of As(III) because of the side reactions with natural organic matter. So, the development of adsorbent that could simultaneously oxidize arsenite and adsorb the formed arsenate is becoming the focus of research (Chakravarty et al, 2002;Deschamps et al, 2005;Zhang and Itoh, 2006;Zhang et al, 2007b). Many composite adsorbents have been developed, and they can be mainly divided into the following two classes.…”

Section: Adsorption Coupled With Redox Processmentioning

confidence: 99%

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

2008

Journal of Environmental Sciences

390

View full text Add to dashboard Cite

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.

show abstract

“…Natural materials such as zeolite [11], natural iron ores [7,12,13], siderite [14] and red mud [15] have been examined intensively for arsenic removal. Although these materials are regarded as cheap and effective adsorbents, there are several problems (their impurities, unknown stability and regeneration, low adsorption capacity and slow kinetics) associated with their use [4,13,16]. An ideal adsorbent should have suitable particle size or uniformly accessible pores, high surface area, and physical and/or chemical stability [4].…”

Section: Introductionmentioning

confidence: 99%

Adsorption behavior of arsenic onto protonated titanate nanotubes prepared via hydrothermal method

Niu

Wang

Shi

et al. 2009

Microporous and Mesoporous Materials

119

View full text Add to dashboard Cite

a b s t r a c tA mesoporous material, titanate nanotubes (TNs) with different surface areas (197-312 m 2 g À1 ) and pore size diameters (2-6 nm) was synthesized by alkaline hydrothermal method. Their adsorption abilities to arsenic, the notoriously poisonous inorganic contaminant in groundwater were evaluated. Batch experiments showed that the adsorption of arsenate [As (V)] was more favored in acid solution, while the uptake of arsenite [As (III)] was preferred in alkaline solution. The maximum uptake of As (V) and As (III) calculated by Langmuir equation was 208 mg g À1 (pH 3.0) and 60 mg g À1 (pH 7.0) respectively achieved on TN (180-1) adsorbent (312 m 2 g À1 , internal diameter, 5 nm), which was 33 and 10 times greater than those of nanosized titania particles (40-50 nm, 15 mg g À1 ). Silicate anions, phosphate and sulfate had little effect on arsenic adsorption onto TNs. In several real water samples, TNs still showed high uptake efficiency to arsenic at pH 7.0. More than 80% of As (III) and 95% of As (V) adsorbed on TNs could be desorbed with 1.0 M NaOH solution within 1 h. Comparison study indicated that all the tubular titanate materials exhibited great adsorption capacity to arsenic regardless their surface areas. Since the equipment required for TNs synthesis is simple and cheap, and alkali solutions are reusable, TNs can be regarded as an efficient, low-cost adsorbent for the removal of arsenic.

show abstract

Removal of As(III) and As(V) from water using a natural Fe and Mn enriched sample

Cited by 173 publications

References 17 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 behavior of arsenic onto protonated titanate nanotubes prepared via hydrothermal method

Contact Info

Product

Resources

About