The effect of ozonation on natural organic matter removal by alum coagulation

Bose, Purnendu; Reckhow, David A.

doi:10.1016/j.watres.2006.12.027

Cited by 121 publications

(37 citation statements)

References 45 publications

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“…Subsequently, the ozone presented a DOC removal efficiency of approximately 8%, because it was designed to decompose organic compounds and to change their biochemical properties, and the total DOC reduced to 4.544 ± 0.057 mg/L (Sampling 3). What was more important for the ozone reactor within the water treatment process was that the ozonation could transform non-biodegradable organic compounds to biodegradable compounds to facilitate removal in the subsequent BAC treatment [33]. After further BAC treatment, the total DOC in the water was continually reduced to 3.363 ± 0.084 mg/L (Sampling 4).…”

Section: Dom Size Fraction Of Raw Watermentioning

confidence: 99%

“…Therefore, it could be inferred that the CTP exhibited poor performance for the removal of low MW molecules from the water. A previous study [33] had reported that a combined reaction between low MW biodegradable materials and humic substances could improve the removal of the low MW molecules by the subsequent O 3 -BAC process. Hence, after the CTP, the low MW fraction and hydrophilic natural organic matter were dominant in the residual organic matter.…”

Section: Effects Of Unit Process On Mw Fraction Distributionmentioning

confidence: 99%

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Characteristics of DOM and Removal of DBPs Precursors across O3-BAC Integrated Treatment for the Micro-Polluted Raw Water of the Huangpu River

Zhu

Lü

2013

Water

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Abstract:The aim of this study is to determine the impact upon dissolved organic matter (DOM) and removal of disinfection by-product (DBP) precursors of adding an ozone-biological activated carbon (O 3 -BAC) process after the conventional treatment process (CTP) using water from the Huangpu River in Shanghai, east China. Several metrics, including size fractionation, dissolved organic carbon (DOC) and trihalomethane formation potential (THMFP), were employed to accomplish this goal. In the raw water collected from the Huangpu River, the low molecular weight (MW) molecules (MW <3 kDa) were absolutely dominant in DOM, accounting for more than 55% of total DOC, and the DOM resulted in a high THMFP level of 472.91 ± 4.63 µg/L after an excessive chlorination. The CTP reduced high MW molecules (MW >10 kDa) by 61% and the low MW molecules (MW <3 kDa) by only 8%. The O 3 -BAC presented an accumulated DOC removal efficiency of approximately 50%, in particular, showing a high degree of the removal effectiveness of low MW molecules. Samplings from the CTP, ozone and BAC were subjected to excessive chlorination to determine the THMFP, and the measured concentrations were 211.89 ± 4.58 µg/L, 169.52 ± 4.55 µg/L, and 124.42 ± 4.27 µg/L, respectively. Therefore, coupled with the THMFP removal rate of 74%, the addition of the O 3 -BAC process after an existing CTP improved the water quality of the effluent, particularly, in terms of the improved reduction in the precursors of DBPs.

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Section: Dom Size Fraction Of Raw Watermentioning

confidence: 99%

Section: Effects Of Unit Process On Mw Fraction Distributionmentioning

confidence: 99%

Characteristics of DOM and Removal of DBPs Precursors across O3-BAC Integrated Treatment for the Micro-Polluted Raw Water of the Huangpu River

Zhu

Lü

2013

Water

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“…Bose and Reckhow [7] suggested two-stage coagulation with intermediate oxidation make optimal use of the beneficial effects of oxidation on NOM removal.…”

Section: Effect Of Chlorination On Humic Acid Structurementioning

confidence: 99%

“…However, some studies have suggested that oxidation prior to coagulation tends to hinder dissolved organic carbon (DOC) removal [5,6]. Bose and Reckhow [7] reported that ozone applied to raw water reacted preferentially with humic fraction of NOM which was readily removed from water by coagulation. Ozonation of humic fraction resulted in a decline removal of DOC through coagulation.…”

Section: Introductionmentioning

confidence: 99%

“…There were many researches involved in studying the impact of prior oxidation on coagulation and comparing the NOM removal by coagulation with and without prior oxidation. Staged coagulation with intermediate oxidation (coagulation-ozonation-coagulation) [7] was also studied. And the removal efficiency of DOC and SUVA is substantially enhanced.…”

Section: Introductionmentioning

confidence: 99%

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Removal of disinfection by-products precursors by polyaluminum chloride coagulation coupled with chlorination

Liu

et al. 2008

Separation and Purification Technology

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a b s t r a c tThe effect of coagulation coupled with chlorination (i.e., pre-, inter-, and post-chlorination) on the formation of disinfection by-products (DBPs) and the removal efficiency of DBPs precursors were investigated. Compared with coagulation coupling with pre-chlorination, coagulation coupled with inter-chlorination could lead a higher removal efficiency of dissolved organic carbon (DOC), specific ultraviolet absorbance (SUVA) and chloroacetic acids formation potential (CAAsFP). The CAAsFP/DOC value of residual DOC showed that coagulation with inter-chlorination has a beneficial effect on CAAs precursors removal. More DBPs were produced during inter-chlorination than that of pre-chlorination at pH 7.5, while less DBPs were produced during inter-chlorination than that of pre-chlorination at pH 5.5. In addition, the precipitate of humic acid (HA) after coagulation was chlorinated to study the kinetics of chlorine decay. The results showed that coagulated-HA had a higher reactivity with chlorine than aqueous-HA at pH 7.5. Furthermore, the trends of zeta potential during coagulation process suggested that the distribution of chlorine species had significant influence on the removing of DBPs precursors by coagulation coupled with chlorination.

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Dissolved Organic Matter (DOM) in Natural Environments

Frimmel

Abbt‐Braun

2009

Biophysico‐Chemical Processes Involving Natural Nonliving Organic Matter in Environmental Systems

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The effect of ozonation on natural organic matter removal by alum coagulation

Cited by 121 publications

References 45 publications

Characteristics of DOM and Removal of DBPs Precursors across O3-BAC Integrated Treatment for the Micro-Polluted Raw Water of the Huangpu River

Characteristics of DOM and Removal of DBPs Precursors across O3-BAC Integrated Treatment for the Micro-Polluted Raw Water of the Huangpu River

Removal of disinfection by-products precursors by polyaluminum chloride coagulation coupled with chlorination

Dissolved Organic Matter (DOM) in Natural Environments

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