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Coagulation of dissolved organic matter in surface water by novel titanium (III) chloride: Mechanistic surface chemical and spectroscopic characterisation

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Coagulation of dissolved organic matter in surface water by novel titanium (III) chloride: Mechanistic surface chemical and spectroscopic characterisation. / Hussain, Sabir; Awad, John; Sarkar, Binoy et al.
In: Separation and Purification Technology, Vol. 213, 15.04.2019, p. 213-223.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Hussain, S, Awad, J, Sarkar, B, Chow, CWK, Duan, J & van Leeuwen, J 2019, 'Coagulation of dissolved organic matter in surface water by novel titanium (III) chloride: Mechanistic surface chemical and spectroscopic characterisation', Separation and Purification Technology, vol. 213, pp. 213-223. https://doi.org/10.1016/j.seppur.2018.12.038

APA

Hussain, S., Awad, J., Sarkar, B., Chow, C. W. K., Duan, J., & van Leeuwen, J. (2019). Coagulation of dissolved organic matter in surface water by novel titanium (III) chloride: Mechanistic surface chemical and spectroscopic characterisation. Separation and Purification Technology, 213, 213-223. https://doi.org/10.1016/j.seppur.2018.12.038

Vancouver

Hussain S, Awad J, Sarkar B, Chow CWK, Duan J, van Leeuwen J. Coagulation of dissolved organic matter in surface water by novel titanium (III) chloride: Mechanistic surface chemical and spectroscopic characterisation. Separation and Purification Technology. 2019 Apr 15;213:213-223. doi: 10.1016/j.seppur.2018.12.038

Author

Hussain, Sabir ; Awad, John ; Sarkar, Binoy et al. / Coagulation of dissolved organic matter in surface water by novel titanium (III) chloride : Mechanistic surface chemical and spectroscopic characterisation. In: Separation and Purification Technology. 2019 ; Vol. 213. pp. 213-223.

Bibtex

@article{50f9cddb85bc43dfb71300496365bdc3,
title = "Coagulation of dissolved organic matter in surface water by novel titanium (III) chloride: Mechanistic surface chemical and spectroscopic characterisation",
abstract = "Problems caused by residual organics in treated water include the formation of disinfection by-products (DBP) following reaction with chlorine and being a substrate for microbial regrowth in the drinking water distribution system. Dissolved organic matter (DOM) can only be partially removed by conventional treatment process i.e. coagulation by Al- and Fe-based salts. In the present study, the performance of titanium trichloride (TiCl3) as a coagulant for surface water treatment was studied and compared with conventionally used aluminum sulfate (alum). Jar test experiments were performed at various coagulant doses and pH levels to determine the optimum conditions based on removal efficiencies of dissolved organic carbon (DOC). The zeta potential values were analysed for assessing the destabilisation mechanism of DOM flocs. The TiCl3 showed a significantly higher capacity for DOC removal at pH around 3 at which charge neutralization was found to be the dominant mechanism for the floc formation. This was further evident from the relatively larger floc sizes obtained with TiCl3 treatment. However, destabilization of Ti-flocs occurred at pH 4.5 through an adsorption-enmeshment mechanism due to a highly negative zeta potential. Additionally, fluorescence spectroscopic analyses showed that TiCl3 was more efficient than alum in removing humic compounds. A two-stage treatment process by alum and TiCl3, either as the same chemical or both showed better performance than a single dose treatment. The results indicate that TiCl3 could be an effective alternative coagulant for the treatment of waters, particularly those of low alkalinity and high DOC concentration and low pH wastewaters for removal of hydrophobic compounds and particulate matter.",
keywords = "Coagulation, Dissolved organic matter, Floc stabilization, Fluorescence spectroscopy, Titanium trichloride",
author = "Sabir Hussain and John Awad and Binoy Sarkar and Chow, {Christopher W.K.} and Jinming Duan and {van Leeuwen}, John",
year = "2019",
month = apr,
day = "15",
doi = "10.1016/j.seppur.2018.12.038",
language = "English",
volume = "213",
pages = "213--223",
journal = "Separation and Purification Technology",
issn = "1383-5866",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Coagulation of dissolved organic matter in surface water by novel titanium (III) chloride

T2 - Mechanistic surface chemical and spectroscopic characterisation

AU - Hussain, Sabir

AU - Awad, John

AU - Sarkar, Binoy

AU - Chow, Christopher W.K.

AU - Duan, Jinming

AU - van Leeuwen, John

PY - 2019/4/15

Y1 - 2019/4/15

N2 - Problems caused by residual organics in treated water include the formation of disinfection by-products (DBP) following reaction with chlorine and being a substrate for microbial regrowth in the drinking water distribution system. Dissolved organic matter (DOM) can only be partially removed by conventional treatment process i.e. coagulation by Al- and Fe-based salts. In the present study, the performance of titanium trichloride (TiCl3) as a coagulant for surface water treatment was studied and compared with conventionally used aluminum sulfate (alum). Jar test experiments were performed at various coagulant doses and pH levels to determine the optimum conditions based on removal efficiencies of dissolved organic carbon (DOC). The zeta potential values were analysed for assessing the destabilisation mechanism of DOM flocs. The TiCl3 showed a significantly higher capacity for DOC removal at pH around 3 at which charge neutralization was found to be the dominant mechanism for the floc formation. This was further evident from the relatively larger floc sizes obtained with TiCl3 treatment. However, destabilization of Ti-flocs occurred at pH 4.5 through an adsorption-enmeshment mechanism due to a highly negative zeta potential. Additionally, fluorescence spectroscopic analyses showed that TiCl3 was more efficient than alum in removing humic compounds. A two-stage treatment process by alum and TiCl3, either as the same chemical or both showed better performance than a single dose treatment. The results indicate that TiCl3 could be an effective alternative coagulant for the treatment of waters, particularly those of low alkalinity and high DOC concentration and low pH wastewaters for removal of hydrophobic compounds and particulate matter.

AB - Problems caused by residual organics in treated water include the formation of disinfection by-products (DBP) following reaction with chlorine and being a substrate for microbial regrowth in the drinking water distribution system. Dissolved organic matter (DOM) can only be partially removed by conventional treatment process i.e. coagulation by Al- and Fe-based salts. In the present study, the performance of titanium trichloride (TiCl3) as a coagulant for surface water treatment was studied and compared with conventionally used aluminum sulfate (alum). Jar test experiments were performed at various coagulant doses and pH levels to determine the optimum conditions based on removal efficiencies of dissolved organic carbon (DOC). The zeta potential values were analysed for assessing the destabilisation mechanism of DOM flocs. The TiCl3 showed a significantly higher capacity for DOC removal at pH around 3 at which charge neutralization was found to be the dominant mechanism for the floc formation. This was further evident from the relatively larger floc sizes obtained with TiCl3 treatment. However, destabilization of Ti-flocs occurred at pH 4.5 through an adsorption-enmeshment mechanism due to a highly negative zeta potential. Additionally, fluorescence spectroscopic analyses showed that TiCl3 was more efficient than alum in removing humic compounds. A two-stage treatment process by alum and TiCl3, either as the same chemical or both showed better performance than a single dose treatment. The results indicate that TiCl3 could be an effective alternative coagulant for the treatment of waters, particularly those of low alkalinity and high DOC concentration and low pH wastewaters for removal of hydrophobic compounds and particulate matter.

KW - Coagulation

KW - Dissolved organic matter

KW - Floc stabilization

KW - Fluorescence spectroscopy

KW - Titanium trichloride

U2 - 10.1016/j.seppur.2018.12.038

DO - 10.1016/j.seppur.2018.12.038

M3 - Journal article

AN - SCOPUS:85058507931

VL - 213

SP - 213

EP - 223

JO - Separation and Purification Technology

JF - Separation and Purification Technology

SN - 1383-5866

ER -