Impact of phosphate, silicate and natural organic matter on the size of Fe(III) precipitates and arsenate co-precipitation efficiency in calcium containing water

Arslan Ahmad; Sam Rutten; Martijn Eikelboom; Luuk de Waal; Harry Bruning; Prosun Bhattacharya; Albert van der Wal

doi:10.1016/j.seppur.2019.116117

Impact of phosphate, silicate and natural organic matter on the size of Fe(III) precipitates and arsenate co-precipitation efficiency in calcium containing water

Arslan Ahmad^*
, Sam Rutten
, Martijn Eikelboom
, Luuk de Waal
, Harry Bruning
, Prosun Bhattacharya
, Albert van der Wal

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

50 Citations (Scopus)

49 Downloads (Pure)

Abstract

Removal of arsenic (As) from water by co-precipitation with Fe(III) (oxyhydr)oxides is a widely used technique in water treatment. Nevertheless, As removal efficiency appears to be sensitive to the composition of the water matrix. The aim of this study was to gain a deeper understanding of the independent and combined effects of silicate (Si), phosphate (P), natural organic matter (NOM) and calcium (Ca) on arsenate [As(V)] co-precipitation efficiency and the size of Fe(III) precipitates. We found that, in complex solutions, containing multiple solutes and high levels of Ca, (variations in) Si and P concentrations reduce As(V) removal to some extent, mainly due to a decreased adsorption of As(V) onto Fe(III) precipitates. On the other hand, NOM concentrations reduced As(V) removal to a much greater extent, due to possible formation of mobile Fe(III)–NOM complexes that were difficult to remove by filtration. These findings have a great significance for predicting As(V) removal as a function of seasonal and process-related water quality changes at water treatment plants.

Original language	English
Article number	116117
Journal	Separation and purification technology
Volume	235
DOIs	https://doi.org/10.1016/j.seppur.2019.116117
Publication status	Published - 18 Mar 2020
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation

Keywords

Arsenic removal
Drinking water
Ferric chloride (FeCl)
Groundwater treatment
Natural organic matter (NOM)

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10.1016/j.seppur.2019.116117Licence: CC BY-NC-ND

ArticleFinal published version, 1.51 MBLicence: CC BY-NC-ND

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Ahmad, A., Rutten, S., Eikelboom, M., de Waal, L., Bruning, H., Bhattacharya, P., & van der Wal, A. (2020). Impact of phosphate, silicate and natural organic matter on the size of Fe(III) precipitates and arsenate co-precipitation efficiency in calcium containing water. Separation and purification technology, 235, Article 116117. https://doi.org/10.1016/j.seppur.2019.116117

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title = "Impact of phosphate, silicate and natural organic matter on the size of Fe(III) precipitates and arsenate co-precipitation efficiency in calcium containing water",

abstract = "Removal of arsenic (As) from water by co-precipitation with Fe(III) (oxyhydr)oxides is a widely used technique in water treatment. Nevertheless, As removal efficiency appears to be sensitive to the composition of the water matrix. The aim of this study was to gain a deeper understanding of the independent and combined effects of silicate (Si), phosphate (P), natural organic matter (NOM) and calcium (Ca) on arsenate [As(V)] co-precipitation efficiency and the size of Fe(III) precipitates. We found that, in complex solutions, containing multiple solutes and high levels of Ca, (variations in) Si and P concentrations reduce As(V) removal to some extent, mainly due to a decreased adsorption of As(V) onto Fe(III) precipitates. On the other hand, NOM concentrations reduced As(V) removal to a much greater extent, due to possible formation of mobile Fe(III){\textendash}NOM complexes that were difficult to remove by filtration. These findings have a great significance for predicting As(V) removal as a function of seasonal and process-related water quality changes at water treatment plants.",

keywords = "Arsenic removal, Drinking water, Ferric chloride (FeCl), Groundwater treatment, Natural organic matter (NOM)",

author = "Arslan Ahmad and Sam Rutten and Martijn Eikelboom and \{de Waal\}, Luuk and Harry Bruning and Prosun Bhattacharya and \{van der Wal\}, Albert",

note = "Funding Information: This research is co-financed with PPS -funding from the Topconsortia for Knowledge \& Innovation (TKI{\textquoteright}s) of the Ministry of Economic Affairs and Climate, The Netherlands. AA acknowledges support from Evides Waterbedrijf. The authors want to thank Wolter Siegers of KWR and Peter Vollaard of Evides for their support during the experiments. Funding Information: This research is co-financed with PPS-funding from the Topconsortia for Knowledge \& Innovation (TKI's) of the Ministry of Economic Affairs and Climate, The Netherlands. AA acknowledges support from Evides Waterbedrijf. The authors want to thank Wolter Siegers of KWR and Peter Vollaard of Evides for their support during the experiments. Publisher Copyright: {\textcopyright} 2019 The Authors",

year = "2020",

month = mar,

day = "18",

doi = "10.1016/j.seppur.2019.116117",

language = "English",

volume = "235",

journal = "Separation and purification technology",

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}

Impact of phosphate, silicate and natural organic matter on the size of Fe(III) precipitates and arsenate co-precipitation efficiency in calcium containing water. / Ahmad, Arslan; Rutten, Sam; Eikelboom, Martijn et al.
In: Separation and purification technology, Vol. 235, 116117, 18.03.2020.

Research output: Contribution to journal › Article › Academic › peer-review

TY - JOUR

T1 - Impact of phosphate, silicate and natural organic matter on the size of Fe(III) precipitates and arsenate co-precipitation efficiency in calcium containing water

AU - Ahmad, Arslan

AU - Rutten, Sam

AU - Eikelboom, Martijn

AU - de Waal, Luuk

AU - Bruning, Harry

AU - Bhattacharya, Prosun

AU - van der Wal, Albert

N1 - Funding Information: This research is co-financed with PPS -funding from the Topconsortia for Knowledge & Innovation (TKI’s) of the Ministry of Economic Affairs and Climate, The Netherlands. AA acknowledges support from Evides Waterbedrijf. The authors want to thank Wolter Siegers of KWR and Peter Vollaard of Evides for their support during the experiments. Funding Information: This research is co-financed with PPS-funding from the Topconsortia for Knowledge & Innovation (TKI's) of the Ministry of Economic Affairs and Climate, The Netherlands. AA acknowledges support from Evides Waterbedrijf. The authors want to thank Wolter Siegers of KWR and Peter Vollaard of Evides for their support during the experiments. Publisher Copyright: © 2019 The Authors

PY - 2020/3/18

Y1 - 2020/3/18

N2 - Removal of arsenic (As) from water by co-precipitation with Fe(III) (oxyhydr)oxides is a widely used technique in water treatment. Nevertheless, As removal efficiency appears to be sensitive to the composition of the water matrix. The aim of this study was to gain a deeper understanding of the independent and combined effects of silicate (Si), phosphate (P), natural organic matter (NOM) and calcium (Ca) on arsenate [As(V)] co-precipitation efficiency and the size of Fe(III) precipitates. We found that, in complex solutions, containing multiple solutes and high levels of Ca, (variations in) Si and P concentrations reduce As(V) removal to some extent, mainly due to a decreased adsorption of As(V) onto Fe(III) precipitates. On the other hand, NOM concentrations reduced As(V) removal to a much greater extent, due to possible formation of mobile Fe(III)–NOM complexes that were difficult to remove by filtration. These findings have a great significance for predicting As(V) removal as a function of seasonal and process-related water quality changes at water treatment plants.

AB - Removal of arsenic (As) from water by co-precipitation with Fe(III) (oxyhydr)oxides is a widely used technique in water treatment. Nevertheless, As removal efficiency appears to be sensitive to the composition of the water matrix. The aim of this study was to gain a deeper understanding of the independent and combined effects of silicate (Si), phosphate (P), natural organic matter (NOM) and calcium (Ca) on arsenate [As(V)] co-precipitation efficiency and the size of Fe(III) precipitates. We found that, in complex solutions, containing multiple solutes and high levels of Ca, (variations in) Si and P concentrations reduce As(V) removal to some extent, mainly due to a decreased adsorption of As(V) onto Fe(III) precipitates. On the other hand, NOM concentrations reduced As(V) removal to a much greater extent, due to possible formation of mobile Fe(III)–NOM complexes that were difficult to remove by filtration. These findings have a great significance for predicting As(V) removal as a function of seasonal and process-related water quality changes at water treatment plants.

KW - Arsenic removal

KW - Drinking water

KW - Ferric chloride (FeCl)

KW - Groundwater treatment

KW - Natural organic matter (NOM)

UR - https://www.scopus.com/pages/publications/85072855348

U2 - 10.1016/j.seppur.2019.116117

DO - 10.1016/j.seppur.2019.116117

M3 - Article

AN - SCOPUS:85072855348

SN - 1383-5866

VL - 235

JO - Separation and purification technology

JF - Separation and purification technology

M1 - 116117

ER -

Impact of phosphate, silicate and natural organic matter on the size of Fe(III) precipitates and arsenate co-precipitation efficiency in calcium containing water

Abstract

UN SDGs

Keywords

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