Selective removal of bromide and iodide from natural waters using a novel AgCl-SPAC composite at environmentally relevant conditions

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Selective removal of bromide and iodide from natural waters using a novel AgCl-SPAC composite at environmentally relevant conditions. / Ateia, Mohamed; Erdem, Cagri Utku; Ersan, Mahmut Selim; Ceccato, Marcel; Karanfil, Tanju.

In: Water Research, Vol. 156, 06.2019, p. 168-178.

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Ateia, Mohamed ; Erdem, Cagri Utku ; Ersan, Mahmut Selim ; Ceccato, Marcel ; Karanfil, Tanju. / Selective removal of bromide and iodide from natural waters using a novel AgCl-SPAC composite at environmentally relevant conditions. In: Water Research. 2019 ; Vol. 156. pp. 168-178.

Bibtex

@article{b3f0e875f7e34d6aaf0a7d770e55065e,
title = "Selective removal of bromide and iodide from natural waters using a novel AgCl-SPAC composite at environmentally relevant conditions",
abstract = "The removal of bromide (Br − ) and iodide (I − ) from source waters mitigates the formation of brominated and iodinated disinfection by-products (DBPs), which are more toxic than their chlorinated analogues. In this study, we report on our recently developed environmental-friendly method for the preparation of novel silver chloride/superfine activated carbon composite (AgCl-SPAC) to rapidly and selectively remove Br − and I − from surface waters. The material characteristics were tracked, before and after treatment, using scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectra (XPS) spectroscopies. The results showed very fast removal kinetics of Br − and I − by AgCl-SPAC with equilibrium times at 150 s and <10 s, respectively (i.e., 2–3 orders of magnitudes faster than previously tested Ag-based composites). In addition, AgCl-SPAC was evaluated under eight different Cl − concentrations up to 400 mg/L and exhibited high removal efficiencies for I − (i.e., >90{\%} at all tested conditions) and Br − (i.e, >80{\%} at Cl − = 0.5–200 mg/L, and 60–75{\%} at extreme Cl − conditions = 300–400 mg/L). Unlike previous Ag-based composites, AgCl-SPAC performance was not affected by elevated concentrations of two types of natural organic matter (2–16 mg-NOM/L). The superior performance was further confirmed in four different surface waters and one groundwater. After the removal of Br − and I − from all waters by AgCl-SPAC, the subsequent DBPs formation (trihalomethanes, haloacetic acids, and haloacetonitriles), total organic halogens (TOX), bromine substitution factor (BSF), and calculated cytotoxicity under the uniform formation conditions (UFC) decreased significantly. Overall, this novel composite represents a promising alternative approach, to be integrated continuously or seasonally, for controlling the formation of brominated and/or iodinated DBPs at water treatment plants.",
keywords = "Bromide, Disinfection by-products, Iodide, Silver chloride, Superfine activated carbon, Water toxicity",
author = "Mohamed Ateia and Erdem, {Cagri Utku} and Ersan, {Mahmut Selim} and Marcel Ceccato and Tanju Karanfil",
year = "2019",
month = "6",
doi = "10.1016/j.watres.2019.03.028",
language = "English",
volume = "156",
pages = "168--178",
journal = "Water Research",
issn = "0043-1354",
publisher = "I W A Publishing",

}

RIS

TY - JOUR

T1 - Selective removal of bromide and iodide from natural waters using a novel AgCl-SPAC composite at environmentally relevant conditions

AU - Ateia, Mohamed

AU - Erdem, Cagri Utku

AU - Ersan, Mahmut Selim

AU - Ceccato, Marcel

AU - Karanfil, Tanju

PY - 2019/6

Y1 - 2019/6

N2 - The removal of bromide (Br − ) and iodide (I − ) from source waters mitigates the formation of brominated and iodinated disinfection by-products (DBPs), which are more toxic than their chlorinated analogues. In this study, we report on our recently developed environmental-friendly method for the preparation of novel silver chloride/superfine activated carbon composite (AgCl-SPAC) to rapidly and selectively remove Br − and I − from surface waters. The material characteristics were tracked, before and after treatment, using scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectra (XPS) spectroscopies. The results showed very fast removal kinetics of Br − and I − by AgCl-SPAC with equilibrium times at 150 s and <10 s, respectively (i.e., 2–3 orders of magnitudes faster than previously tested Ag-based composites). In addition, AgCl-SPAC was evaluated under eight different Cl − concentrations up to 400 mg/L and exhibited high removal efficiencies for I − (i.e., >90% at all tested conditions) and Br − (i.e, >80% at Cl − = 0.5–200 mg/L, and 60–75% at extreme Cl − conditions = 300–400 mg/L). Unlike previous Ag-based composites, AgCl-SPAC performance was not affected by elevated concentrations of two types of natural organic matter (2–16 mg-NOM/L). The superior performance was further confirmed in four different surface waters and one groundwater. After the removal of Br − and I − from all waters by AgCl-SPAC, the subsequent DBPs formation (trihalomethanes, haloacetic acids, and haloacetonitriles), total organic halogens (TOX), bromine substitution factor (BSF), and calculated cytotoxicity under the uniform formation conditions (UFC) decreased significantly. Overall, this novel composite represents a promising alternative approach, to be integrated continuously or seasonally, for controlling the formation of brominated and/or iodinated DBPs at water treatment plants.

AB - The removal of bromide (Br − ) and iodide (I − ) from source waters mitigates the formation of brominated and iodinated disinfection by-products (DBPs), which are more toxic than their chlorinated analogues. In this study, we report on our recently developed environmental-friendly method for the preparation of novel silver chloride/superfine activated carbon composite (AgCl-SPAC) to rapidly and selectively remove Br − and I − from surface waters. The material characteristics were tracked, before and after treatment, using scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectra (XPS) spectroscopies. The results showed very fast removal kinetics of Br − and I − by AgCl-SPAC with equilibrium times at 150 s and <10 s, respectively (i.e., 2–3 orders of magnitudes faster than previously tested Ag-based composites). In addition, AgCl-SPAC was evaluated under eight different Cl − concentrations up to 400 mg/L and exhibited high removal efficiencies for I − (i.e., >90% at all tested conditions) and Br − (i.e, >80% at Cl − = 0.5–200 mg/L, and 60–75% at extreme Cl − conditions = 300–400 mg/L). Unlike previous Ag-based composites, AgCl-SPAC performance was not affected by elevated concentrations of two types of natural organic matter (2–16 mg-NOM/L). The superior performance was further confirmed in four different surface waters and one groundwater. After the removal of Br − and I − from all waters by AgCl-SPAC, the subsequent DBPs formation (trihalomethanes, haloacetic acids, and haloacetonitriles), total organic halogens (TOX), bromine substitution factor (BSF), and calculated cytotoxicity under the uniform formation conditions (UFC) decreased significantly. Overall, this novel composite represents a promising alternative approach, to be integrated continuously or seasonally, for controlling the formation of brominated and/or iodinated DBPs at water treatment plants.

KW - Bromide

KW - Disinfection by-products

KW - Iodide

KW - Silver chloride

KW - Superfine activated carbon

KW - Water toxicity

UR - http://www.scopus.com/inward/record.url?scp=85063578882&partnerID=8YFLogxK

U2 - 10.1016/j.watres.2019.03.028

DO - 10.1016/j.watres.2019.03.028

M3 - Journal article

C2 - 30913420

AN - SCOPUS:85063578882

VL - 156

SP - 168

EP - 178

JO - Water Research

JF - Water Research

SN - 0043-1354

ER -