Adsorption of arsenic from a Nova Scotia groundwater onto water treatment residual solids

Gibbons, Meaghan K.; Gagnon, Graham A.

doi:10.1016/j.watres.2010.06.050

Cited by 61 publications

(35 citation statements)

References 21 publications

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“…A summary of the treatment plant processes is provided in Table 1, and a description of raw water quality, including initial arsenic and phosphorus concentrations, was provided in Ref. [11]. A summary of important elemental analysis of the solids, including Al, Fe, Ca, As, and P is presented in Table 2.…”

Section: Water Treatment Residual Solidsmentioning

confidence: 99%

“…Makris et al [7] attributed the similarity in phosphate and arsenate chemistry as a reason for their work on arsenic adsorption on alum and ferric WTRSs, following an investigation of phosphate adsorption on WTRSs [8,9]. Due to the similarities in the adsorptive capacity between phosphate and arsenate, it is not surprising that similar general trends were found with phosphate or arsenate adsorbing to the ferric residuals in higher amounts than the alum residuals [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…The resulting waste solids, WTRSs, were shown to be suitable for use as phosphate or arsenate adsorbents, with varying success depending on the adsorbent type [10][11][12]. In general, the ferric residual solids were a stronger adsorbent for both phosphate [10] and arsenate [11,12], followed by the lime residual solids. The alum residual solids showed some ability to remove phosphate or arsenate from different water sources.…”

Section: Introductionmentioning

confidence: 99%

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Understanding removal of phosphate or arsenate onto water treatment residual solids

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2011

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Section: Water Treatment Residual Solidsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Understanding removal of phosphate or arsenate onto water treatment residual solids

Gibbons

Gagnon

2011

Journal of Hazardous Materials

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“…In recent decades, the reuse of DWS has catched scholar's interest and attention as sludge disposal cost increases and landfill capacity decreases [1,2]. DWS has been studied extensively as a low-cost adsorbent for removing some pollutants such as phosphorus [3,4], arsenic [5], boron [6], and fluoride [7] from wastewater based on its main components including silicon, aluminum, and iron oxides as well as some clay minerals. It has also been indicated that specific adsorption may be responsible for the removal of these anionic contaminants by DWS and that ligand exchange should be the main adsorption mechanism [8,9].…”

Section: Introductionmentioning

confidence: 99%

Material prepared from drinking waterworks sludge as adsorbent for ammonium removal from wastewater

Yang¹,

Wei²,

Liu³

et al. 2015

Applied Surface Science

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“…2-I), indicating that the first TiO 2 column reached its maximum As(III) adsorption capacity in each cycle. Compared with the adsorption capacity of reported granular adsorbents (0.16e32.4 mg/g) (Badruzzaman et al, 2004;Bang et al, 2005;Dou et al, 2013;Gibbons and Gagnon, 2010;Liu et al, 2013), the granular TiO 2 in this study …”

Section: 3mentioning

confidence: 71%

Simultaneous As(III) and Cd removal from copper smelting wastewater using granular TiO2 columns

Huang

Cui

et al. 2015

Water Research

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Fixed-bed columns Adsorbent regenerationOn-line treatment process a b s t r a c t Remediation of metallurgical industry wastewater has presented a great environmental challenge for decades. In this study, a complete remediation technology was proposed for simultaneous As(III) and Cd adsorptive removal, adsorbent regeneration, and recovery of As and Cd. Using three granular TiO 2 columns in series, As(III) and Cd in the raw water at 2590 ± 295 and 12 ± 2 mg/L, respectively, could be reduced to 0.16 ± 0.11 and 0.0133 ± 0.0134 mg/L, well below the wastewater discharge limit. Spent TiO 2 media could be regenerated using H 2 SO 4 and NaOH, and the regenerated adsorbent could be re-used for at least 10 treatment cycles and 770 bed volumes with no decrease in its adsorption capacity.Remediation of 1 L wastewater generated 0.89e1.5 g solid residue which could be used as an intermediate for the As and Cd chemical refinement. The waste solution can be further treated after mixing with raw water to adjust the raw pH from 1.4 to 7. This adsorption, regeneration, and reuse process provides an innovative technology for metallurgical industry wastewater remediation that is promising for practical application.© 2014 Elsevier Ltd. All rights reserved. IntroductionMining and smelting are major industrial processes that are associated with multiple toxic metal contaminants (Bian et al., 2012). In these industrial wastewaters, coexistence of As(III) and Cd is a great public concern because of their carcinogenicity (Barrett, 2012;Lubin et al., 2008). Thus, developing effective and robust wastewater treatment technology for simultaneous As(III) and Cd removal has motivated extensive research (Allende et al., 2012;Deschamps et al., 2005;Dey et al., 2009;Jiang et al., 2014;Johnson and Hallberg, 2005). Many efforts have been made to solve this problem over past decades, with the result that neutralization-precipitation has been adopted as a commonly used method for removal of heavy metals, including As(III) and Cd, from mining and smelting wastewaters (Dong et al., 2011;McDonald et al., 2006;Wang et al., 2003). For example, an approach using iron precipitation and high density sludge (HDS) recycling has become a benchmark procedure in acid mine drainage treatment (Dey et al., 2009). This HDS process requires increasing the pH with hydrated lime and subsequently adding iron salts to form precipitates with As. However, HDS generates large volumes of sludge with low chemical stability (Dey et al., 2009;McDonald et al., 2006), which may release As under the attack of carbon dioxide (Nishimura and Robins, 1998;Pantuzzo and Ciminelli, 2010 Available online at www.sciencedirect.com ScienceDirect journal homepage: ww w.else vier.com/locate /wa tres w a t e r r e s e a r c h 6 8 ( 2 0 1 5 ) 5 7 2 e5 7 9http://dx

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Adsorption of arsenic from a Nova Scotia groundwater onto water treatment residual solids

Cited by 61 publications

References 21 publications

Understanding removal of phosphate or arsenate onto water treatment residual solids

Understanding removal of phosphate or arsenate onto water treatment residual solids

Material prepared from drinking waterworks sludge as adsorbent for ammonium removal from wastewater

Simultaneous As(III) and Cd removal from copper smelting wastewater using granular TiO2 columns

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