Removal of arsenic from groundwater by granular titanium dioxide adsorbent

Bang, Sunbaek; Patel, Manish P.; Lippincott, Lee; Meng, Xiaoguang

doi:10.1016/j.chemosphere.2004.12.008

Cited by 291 publications

(175 citation statements)

References 28 publications

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“…As (III) exhibited a little faster external and intraparticle diffusion kinetics from the WM model (0.583 and 0.218 mg/g/h 0.5 , respectively, in Table S5) than As (V) (0.497 and 0.133 mg/g/h 0.5 ), consistent with a previous report using GTiO 2 (Bang et al 2005).…”

Section: As (Iii/v) Adsorption Resultssupporting

confidence: 89%

“…Recently, a TiO 2 -based adsorbent demonstrated its advantage in As Responsible editor: Philippe Garrigues Electronic supplementary material The online version of this article (doi:10.1007/s11356-014-3955-8) contains supplementary material, which is available to authorized users. removal due to its chemical stability and high specific affinity to As (Bang et al 2005;Hristovski et al 2008;Jing et al 2009;Luo et al 2010). Therefore, granular TiO 2 (GTiO 2 ) was adopted in our approach to remove high As in groundwater from geogenic areas.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, coexisting anions such as phosphate (P), silicate (Si), and bicarbonate (HCO 3 − ) can suppress As adsorption (Meng et al 2000;Stachowicz et al 2008;. Though the effect of coexisting ions has been widely studied in batch systems, the compounded influence on As removal in GTiO 2 columns is still not fully understood (Bang et al 2005).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Groundwater arsenic removal using granular TiO2: integrated laboratory and field study

Cui

et al. 2014

Environ Sci Pollut Res

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High concentrations of arsenic (As) in groundwater pose a great threat to human health. The motivation of this study was to provide a practical solution for As-safe water in As geogenic areas using granular TiO 2 (GTiO 2 ). The kinetics results indicated that the As (III/V) adsorption on GTiO 2 conformed to the Weber-Morris (WM) intraparticle diffusion model. The Langmuir isotherm results suggested that the adsorption capacities for As (III) and As (V) were 106.4 and 38.3 mg/g, respectively. Ion effect study showed that cationic Ca and Mg substantially enhanced As (V) adsorption, whereas no significant impact was observed on As (III). Silicate substantially decreased As (V) adsorption by 57 % and As (III) by 50 %. HCO 3 − remarkably inhibited As (V) adsorption by 52 %, whereas it slightly reduced As (III) adsorption by 8 %. Field column results demonstrated that ∼700 μg/L As was removed at an empty bed contact time (EBCT) of 1.08 min for 968 bed volumes before effluent As concentration exceeded 10 μg/L, corresponding to 0.96 mg As/g GTiO 2 . Two household filters loaded with 110 g GTiO 2 in the on-off operational mode can provide 6-L/day As-safe drinking water up to 288 and 600 days from the groundwater containing ∼700 μg/L As and ∼217 μg/L As, respectively. Integration of batch experiments and column tests with systematic variation of EBCTs was successfully achieved using PHREEQC incorporating a charge distribution multisite complexation (CD-MUSIC) model and one-dimensional reactive transport block.

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Section: As (Iii/v) Adsorption Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Groundwater arsenic removal using granular TiO2: integrated laboratory and field study

Cui

et al. 2014

Environ Sci Pollut Res

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“…Thus, the presence of arsenic in drinking waters at concentrations higher than the maximum contaminant level of 10 g/L resulted in the development of many removal methods such as chemical coagulation [3] and adsorption on activated alumina [4,5], activated carbon [6], iron oxy-hydroxides [7,8], TiO 2 [9][10][11], CeO 2 [12], ZrO 2 [13] and binary Fe/Mn structures [14]. Nevertheless, adsorption is nowadays the most commonly practiced method for arsenic removal, offering many advantages including simple and stable operation, easy handling of waste, absence of added reagents, compact facilities and acceptable operational cost [15].…”

Section: Introductionmentioning

confidence: 99%

A novel approach for arsenic adsorbents regeneration using MgO

Tresintsi

Simeonidis

Katsikini

et al. 2014

Journal of Hazardous Materials

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“…For example, Dutt a et al (19) reported that lower pH enhances the removal of As(V) from water by adsorption onto TiO 2 . Furthermore, Bang et al (25), who worked with higher concentrations of competitive ions than we did, reported no obvious eff ect of silica and phosphorus on the adsorption of As(V) onto granular TiO 2 . Table 2 reports the Langmuir constant Q 0 , representing maximum monolayer coverage capacity and the Langmuir isotherm constant K L , representing the sorp tion capacity, of the three adsorbents (Fig.…”

Section: Adsorption Experimentsmentioning

confidence: 99%

Adsorption Characteristics of Different Adsorbents and Iron(III) Salt for Removing As(V) from Water

Ćurko

Matošić

Crnek

et al. 2016

Food Technol. Biotechnol.

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SummaryThe aim of this study is to determine the adsorption performance of three types of adsorbents for removal of As(V) from water: Bayoxide ® E33 (granular iron(III) oxide), Titansorb ® (granular titanium oxide) and a suspension of precipitated iron(III) hydroxide. Results of As(V) adsorption stoichiometry of two commercial adsorbents and precipitated iron(III) hydroxide in tap and demineralized water were fi tt ed to Freundlich and Langmuir adsorption isotherm equations, from which adsorption constants and adsorption capacity were calculated. The separation factor R L for the three adsorbents ranged from 0.04 to 0.61, indicating eff ective adsorption. Precipitated iron(III) hydroxide had the greatest, while Titansorb had the lowest capacity to adsorb As(V). Comparison of adsorption from tap or demineralized water showed that Bayoxide and precipitated iron(III) hydroxide had higher adsorption capacity in demineralized water, whereas Titansorb showed a slightly higher capacity in tap water. These results provide mechanistic insights into how commonly used adsorbents remove As(V) from water.

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Removal of arsenic from groundwater by granular titanium dioxide adsorbent

Cited by 291 publications

References 28 publications

Groundwater arsenic removal using granular TiO2: integrated laboratory and field study

Groundwater arsenic removal using granular TiO2: integrated laboratory and field study

A novel approach for arsenic adsorbents regeneration using MgO

Adsorption Characteristics of Different Adsorbents and Iron(III) Salt for Removing As(V) from Water

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