Insight into changes during coagulation in NOM reactivity for trihalomethanes and haloacetic acids formation

Tubić, Aleksandra; Agbaba, Jasmina; Dalmacija, Božo; Molnar, Jelena; Maletić, Snežana; Watson, Malcolm; Perović, Svetlana Ugarčina

doi:10.1016/j.jenvman.2012.11.046

Cited by 42 publications

(27 citation statements)

References 23 publications

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“…This increases the NOM absorptivity on the surface of the metal-hydroxide formed after the addition of the coagulant and therefore increases the efficacy of the combined process compared to the baseline coagulation [5,22,23]. Our previous results [15] have also shown that preozonation improves efficacy of NOM removal by coagulation for similar water type.…”

Section: Coagulation Combined With Preozonationmentioning

confidence: 61%

“…PAC may be successfully applied in drinking water treatment for odour and taste control [13], as well as for the removal of different organic contaminants and DBP precursors [14]. PAC can also be an effective adsorbent of low molecular weight organic matter [8] which can show significant potential to form DBP in reaction with chlorine [15]. PAC has the advantage of being an inexpensive material, easily applied, with minimal capital expenditure required for PAC feeding and contacting equipment.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the impact of ozone pretreatment and powdered activated carbon addition on the removal of natural organic matter by coagulation

Agbaba

Tubić

Dalmacija

et al. 2014

Desalination and Water Treatment

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Snežana Maletić (2014): Investigation of the impact of ozone pretreatment and powdered activated carbon addition on the removal of natural organic matter by coagulation, Desalination and Water Treatment, A B S T R A C TThe main goal of this study was to investigate the effects of ozone oxidation pretreatment and powdered activated carbon (PAC) addition on the efficacy of natural organic matter (NOM) removal by coagulation. Relatively high iron chloride doses from 100 to 200 mg FeCl 3 /L were applied, due to the high dissolved organic carbon (DOC) content (10.27 ± 0.49 mg C/L) of the raw water investigated, with PAC used in doses of 5-30 mg/L. Preozonation was carried out at doses of 0.2-1.3 mg O 3 /mg DOC. Jar test results indicate that baseline coagulation with the optimal coagulant dose (200 mg FeCl 3 /L) achieved was 39% DOC and 54% UV 254 removals. PAC addition improves coagulation efficacy in NOM removal by up to 9% DOC and 25% UV 254 . The best results were obtained in combination with 0.6 mg O 3 /mg DOC, 5 mg/L PAC and 200 mg FeCl 3 /L (removals of 58% DOC and 72% UV 254 ), and were a significant improvement compared to coagulation alone.

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Section: Coagulation Combined With Preozonationmentioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Investigation of the impact of ozone pretreatment and powdered activated carbon addition on the removal of natural organic matter by coagulation

Agbaba

Tubić

Dalmacija

et al. 2014

Desalination and Water Treatment

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“…Although similar removal of DBPPs was achieved by the two different coagulants, HAA precursors were more effectively removed than THM precursors (Tables 1 and 2). Removal preference for HAA has been demonstrated by other authors as well (Mourad 2008;Tubić et al 2013) and believed to result because the fraction of DOC responsible for their formation have higher aromaticity (Liang and Singer 2003;Hansen et al 2018). Coagulation is known to be effective in removing the fraction of the DOC pool that forms DBPs, particularly those associated with high molecular weight, aromatic compounds (Uyak et al 2008;Matilainen et al 2010;Roberts and Inniss 2014).…”

Section: Coagulationmentioning

confidence: 66%

Sequestration and Transformation in Chemically Enhanced Treatment Wetlands: DOC, DBPPs, and Nutrients

Bachand¹,

Bachand²,

Kraus

et al. 2019

J. Environ. Eng.

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This paper examines the effectiveness of chemically enhanced treatment wetlands (CETWs), wetlands that received water treated with coagulants, to remove dissolved organic carbon (DOC), disinfection byproduct precursors (DBPPs), nutrients, and metals from agricultural drain water. Wetlands consisted of controls with no coagulant addition, ferric sulfate dosed, and polyaluminum chloride dosed treatments. CETWs were more effective in removing DOC, DBPPs, phosphate, dissolved organic nitrogen, and metals than control wetlands. Coagulation-treated wetlands removed 245-349 g=m 2 =year DOC, whereas control wetlands produced 51 g=m 2 =year. Wetland passage released DOC in the controls and dosed treatments; this release was directly correlated to temperature, suggesting thermally dependent mechanism(s) were partly responsible. A first-order plug flow reactor kinetic model that considered hydraulic retention time (HRT), temperature, and DOC concentration was tested for wetland DOC processing. Models indicate that operating CETWs at high coagulant dosing and low temperature can result in the lowest DOC release. Operating at the lowest HRT to meet discharge targets helps overcome wetland processes that increase DOC release and provide the smallest footprint needed for treatment. individual papers. This paper is part of the Journal of Environmental Engineering, © ASCE, ISSN 0733-9372. © ASCE 04019044-1 J. Environ. Eng. J. Environ. Eng., 2019, 145(8): 04019044 Downloaded from ascelibrary.org by 44.224.250.200 on 07/05/20. Copyright ASCE. For personal use only; all rights reserved. © ASCE 04019044-2 J. Environ. Eng. J. Environ. Eng., 2019, 145(8): 04019044 Downloaded from ascelibrary.org by 44.224.250.200 on 07/05/20. Copyright ASCE. For personal use only; all rights reserved. © ASCE 04019044-3 J. Environ. Eng. J. Environ. Eng., 2019, 145(8): 04019044 Downloaded from ascelibrary.org by 44.224.250.200 on 07/05/20. Copyright ASCE. For personal use only; all rights reserved. Me for all wetlands. Constants were calculated using nonlinear multivariate regression and modeling was performed using STATISTICA version 8.0. Results DOC and DBPP Concentrations, Loads and Concentration RatiosAverage constituent concentrations, annual loads and concentration ratios for DOC and DBPPs are shown in Tables 1 and 2. Annually, Al and Fe coagulation removed 71%-72% of DOC loads entering the wetlands, 66%-69% of THM precursors, and 79%-81% of © ASCE 04019044-4 J. Environ. Eng. J. Environ. Eng., 2019, 145(8): 04019044 Downloaded from ascelibrary.org by 44.224.250.200 on 07/05/20. Copyright ASCE. For personal use only; all rights reserved. © ASCE 04019044-8 J. Environ. Eng. J. Environ. Eng., 2019, 145(8): 04019044 Downloaded from ascelibrary.org by 44.224.250.200 on 07/05/20. Copyright ASCE. For personal use only; all rights reserved. © ASCE 04019044-12 J. Environ. Eng. J. Environ. Eng., 2019, 145(8): 04019044 Downloaded from ascelibrary.org by 44.224.250.200 on 07/05/20. Copyright ASCE. For personal use only; all rights reserved. © ASCE 04019044-16 J...

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“…1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 obtaining a 56% removal in HAAFP. This value was 24% higher than when FeCl 3 was used as coagulant [7]. Other authors found that the coagulation process can reduce haloacetic acid formation potential by 15%-78% [28].…”

Section: Methodsmentioning

confidence: 82%

Reduction of haloacetic acids in natural surface water by integrated treatment: coagulation and membrane processes

Sentana-Gadea¹,

Benraouane²,

Aït-Amar³

et al. 2017

Desalination and Water Treatment

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The objectives of this research were to study the elimination of dissolved organic carbon (DOC) and the reduction in the formation of haloacetic acid potential (HAAFP) when natural water from La Pedrera reservoir was treated with a single process of coagulation or filtration membrane, and a combined process ( coagulation followed by treatment with membranes). In this research two coagulants, aluminium sulfate and polyaluminium chloride, and four membranes, two nanofiltration membranes (NF 90 and DESAL HL) and two ultrafiltration membranes (PES 5000 and PES 10000) were studied. The highest reduction in DOC was obtained when the natural water underwent the combined treatment of coagulation followed by NF90 membrane filtration. With this combined treatment the values of DOC rejection were over 82% independently of the coagulant used. For the single treatment with nanofiltration membranes, HAAFP rejection was 81% for NF 90 and 76% for Desal HL. However, a single treatment with coagulation or ultrafiltration membranes showed results for HAAFP rejection of under 35% and 26%, respectively. When a combined treatment of aluminium sulfate followed by ultrafiltration with the PES 5000 membrane was used, HAAFP rejection reached values of 80% approx. These values are very similar to the results obtained from a single treatment with NF 90 but with the advantage that the flux of PES 5000 is 4,000 times the flux of the NF 90 membrane. Therefore, this treatment should be given due consideration.

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Insight into changes during coagulation in NOM reactivity for trihalomethanes and haloacetic acids formation

Cited by 42 publications

References 23 publications

Investigation of the impact of ozone pretreatment and powdered activated carbon addition on the removal of natural organic matter by coagulation

Investigation of the impact of ozone pretreatment and powdered activated carbon addition on the removal of natural organic matter by coagulation

Sequestration and Transformation in Chemically Enhanced Treatment Wetlands: DOC, DBPPs, and Nutrients

Reduction of haloacetic acids in natural surface water by integrated treatment: coagulation and membrane processes

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