Removal of As(V) from aqueous solution by activated carbon-based hybrid adsorbents: Impact of experimental conditions

Tuna, Aslı Özge Avcı; Özdemir, Ercan; Şimşek, Esra Bilgin; Beker, Ülker

doi:10.1016/j.cej.2013.02.096

Cited by 111 publications

(56 citation statements)

References 63 publications

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“…At the end of the twentieth century, the revision of the maximum contaminant level (MCL) for arsenic in drinking water was reduced from 50 to 10 μg/l by the Environmental Protection Agency (USEPA) and World Health Organization (WHO) (Ghosh et al 2006a). Arsenic pollution has been a long concern, and such incidents occur frequently in recent years, especially in waters and soils (Jain and Ali 2000;Smedley and Kinniburgh 2002;Swartz et al 2004;Jaime et al 2007;Amstaetter et al 2010;Jia et al 2012;Tuna et al 2013). …”

Section: Introductionmentioning

confidence: 95%

Arsenite and arsenate leaching and retention on iron (hydr)oxide-coated sand column

et al. 2015

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Purpose Arsenite and arsenate leaching from iron (hydr)oxides is one major parameter affecting the mobility of arsenic in the natural environment. In the process of arsenic transfer to groundwater, the retention capacity of arsenic by different iron (hydr)oxides needs to be investigated. The aim of this study is to determine the retention capacity of arsenite or arsenate from the ferrihydrite, lepidocrocite, or magnetite-coated sand column in the leaching process as well as the influence factors on leaching. Materials and methods The leaching of arsenite and arsenate from columns loaded with ferrihydrite, magnetite, or lepidocrocite-coated quartz sand was examined, and the influence factors such as pH, phosphate, and humic acid (HA) contents on leaching and retention were also investigated. Results and discussion The retention performance of As(III) and As(V) depended on the type of iron (hydr)oxides: ferrihydrite>magnetite>lepidocrocite. The retention capacities of As(III) and As(V) by amorphous ferrihydrite versus magnetite and lepidocrocite are 3.25, 5.63 (As(III)) and 1.75, 3.65 (As(V)) times higher. The retention capacity of arsenic is largely affected by the pH of leaching solutions. The retention of As(III) by ferrihydrite is efficient in near-neutral or slightly acidic environments. The addition of phosphate or HA significantly affected the leaching and retention. The addition of phosphate severely inhibited the leaching and retention of As(III) and As(V) by ferrihydrite, and the inhibitory effect was more obvious along with the increase of phosphate concentration. The retention of As(III) and As(V) by ferrihydrite was significantly enhanced by the addition of low-dose HA but was inhibited by the addition of excessive HA. Conclusions Retention performance of As(III) and As(V) from a ferrihydrite-coated sand column is greater than a magnetite-or a lepidocrocite-coated sand column, and the influence factors such as pH, phosphate, and HA affect the leaching and retention of As(III) and As(V). The results theoretically underlie the application of iron (hydr)oxide in arsenic pollution control.

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Section: Introductionmentioning

confidence: 95%

Arsenite and arsenate leaching and retention on iron (hydr)oxide-coated sand column

et al. 2015

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“…Among various treatment technologies, adsorption technique is considered as one of the most popular, efficient and practical methods, due to its high efficiency, easy operation, low cost and little risk. Owing to the worldwide research efforts, more and more adsorbents have been developed, which include activated carbon [21], activated alumina [22], iron hydroxide and oxide [23], anionic clays [24], zeolites [25], chitosan [26] and others [27,28]. Recently, layered double hydroxides (LDHs), known as a kind of multifunctional materials, have been reported to serve as adsorbents for anionic contaminants removal due to their large surface area, high anion exchange capacity and good thermal stability [29].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and arsenic adsorption performances of ferric-based layered double hydroxide with α-alanine intercalation

Jiang

Zhu

et al. 2014

Chemical Engineering Journal

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“…Similar phenomena were observed by other researchers (Table S3). Zhang et al found that the diffusion of As (V) within the pores of the magnetite ACFs was more rapid than that of the raw ACF. Tawabini et al studied As (III) adsorption onto raw multiwalled carbon nanotubes (MCNTs) and iron oxide‐modified MCNTs (Fe‐MCNTs).…”

Section: Resultsmentioning

confidence: 99%

Novel composite sorbents based on carbon fibers decorated with ferric hydroxides—Arsenic removal

Şimşek

Novak

Berek

et al. 2018

Asia-Pacific J Chem Eng

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Carbon fibers (CF) were prepared by carbonization of cellulose and further deposited with ferric hydroxide (CF–Fe). The synthesized CF and CF–Fe composites were employed to remove arsenate from aqueous solution. CF–Fe samples with different amount of Fe (3, 7, 11, and 20 wt.%) were characterized using SEM‐EDX, XPS, FTIR, BET, pH titration, and zeta potential measurements. Batch isotherm studies were performed to determine the As (V) adsorption performance of both raw CF and CF–Fe. CF–Fe composites exhibited significantly higher As (V) adsorption capacity compared with raw CF, namely, 167.95 versus 412.8 μg/g and for raw CF and CF–Fe (3%), respectively. The presence of Cl− and SO42− only slightly affected the As (V) adsorption, whereas competitive adsorption displayed the highest influence of PO43−, followed by F− and CO32−. The results revealed that both coulombic interactions and surface complexation reactions play important role in the As (V) adsorption process.

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Removal of As(V) from aqueous solution by activated carbon-based hybrid adsorbents: Impact of experimental conditions

Cited by 111 publications

References 63 publications

Arsenite and arsenate leaching and retention on iron (hydr)oxide-coated sand column

Arsenite and arsenate leaching and retention on iron (hydr)oxide-coated sand column

Synthesis and arsenic adsorption performances of ferric-based layered double hydroxide with α-alanine intercalation

Novel composite sorbents based on carbon fibers decorated with ferric hydroxides—Arsenic removal

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