Impact of pre-ozonation on disinfection by-product formation and speciation from chlor(am)ination of algal organic matter of Microcystis aeruginosa

Zhu, Ming; Gao, Naiyun; Chu, Wenhai; Zhou, Shiqing; Zhengde, Zhang; Xu, Yunhua; Qi, Dai

doi:10.1016/j.ecoenv.2015.05.048

Cited by 58 publications

(19 citation statements)

References 43 publications

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“…The HAA formation potentials of AOM were 36.59-70.75 μmol/L. In previous similar studies, HAAs rather than THMs were the major species of DBPs from AOM (Diehl et al, 2000;Hua et al, 2019;Hua et al, 2018;Zhu et al, 2015) and from NOM (Diehl et al, 2000;Hong et al, 2007;Liu et al, 2018;Tian et al, 2013).…”

Section: Formation Of Dbps From Aom During Chloramination and Chlorinationsupporting

confidence: 52%

Formation of Disinfection Byproducts from Algal Organic Matter Exposed to Monochloramine: Effects of Monochloramine Dosages, pH, and Bromide Concentrations

Zhai

Zhou

2020

Water Air Soil Pollut

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The formation of volatile DBPs and haloacetic acids (HAAs) from algal organic matter (AOM) in different chloramination conditions (i.e., different monochloramine (NH 2 Cl) dosages, pH values, and bromide concentrations) was studied. In chloramination of AOM, HAAs were the major DBP species, followed by trihalomethanes (THMs), haloacetonitriles (HANs), and haloketones (HKs). The levels of THMs, HAAs, HKs, and HANs generated in chloramination were 75%, 69%, 68%, and 122% of those in chlorination, respectively. The concentrations of THMs and HAAs both doubled as the NH 2 Cl dosage doubled. The proportions of bromodichloromethane and dibromochloromethane in THMs and the proportions of dichloroacetic acid and trichloroacetic acid in HAAs increased with the NH 2 Cl dosage. Accelerating the pH value enhanced the formation of THMs, HAAs, and HANs, respectively, and favored the formation of brominated THMs. The HAN species distribution was unaffected by the NH 2 Cl dosage and pH. Increasing bromide levels slightly increased the yield of THMs and slightly decreased the yields of HAAs and HKs. The species shift from the chlorinated to the brominated was more significant for THMs and HANs than for HAAs. The THM-BSF and dichloroacetonitrile-BSF values were lower in chloramination than in chlorination. The high pH value and bromide level significantly accelerated the THM-BSFs. The maximum values of THM-BSFs and dichloroacetonitrile-BSF were 0.6 and 0.5.

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Section: Formation Of Dbps From Aom During Chloramination and Chlorinationsupporting

confidence: 52%

Formation of Disinfection Byproducts from Algal Organic Matter Exposed to Monochloramine: Effects of Monochloramine Dosages, pH, and Bromide Concentrations

Zhai

Zhou

2020

Water Air Soil Pollut

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“…Chlorination experiments were conducted according to the method developed by Dotson et al using free chlorine and chloramine. 17 Following incubation and quenching under ambient temperature, samples were extracted with methyl tert butyl ether (MTBE) and analyzed immediately by gas chromatography (GC) with an electron capture detector (ECD) using a HP-5 column (30 m Â 0.25 mm, ID Â 0.25 mm, J&W Scientic, Folsom, CA, USA), 11 which was also shown to be feasible and used in many previous studies. The required dosages of disinfectants were calculated as previously reported.…”

Section: Dbp Formation Potential Tests and Dbps Analytical Methodsmentioning

confidence: 99%

The formation of haloacetamides, as an emerging class of N-DBPs, from chlor(am)ination of algal organic matter extracted from Microcystis aeruginosa, Scenedesmus quadricauda and Nitzschia palea

Cao

et al. 2017

RSC Adv.

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Critical algal blooms in lakes increased the concentration of algal organic matter (AOM), significantly altering the drinking water treatment requirements, including coagulation, oxidation and disinfection.This study utilized Microcystis aeruginosa (cyanobacteria), Scenedesmus quadricauda (Chlorella) andNitzschia palea (diatom) as models to investigate the AOM's primary characteristics and their contribution to the formation of chloroacetamides as novel disinfection byproducts (DBPs). Spectral analysis was used to characterize the proteins, carbohydrates and amino acids in AOM. The generation of chloroacetamides during chlor(am)ination was determined by gas chromatography with electron capture detection. Although Microcystis aeruginosa is the dominant species in freshwater worldwide, the AOM of Nitzschia palea showed the highest dissovled organic carbon (DOC) formation (4.02 or 1.42 ng per cell in extracellular organic matter (EOM) or intracellular organic matter (IOM), respectively).Scenedesmus quadricauda, as a typical green algae, showed the greatest formation potential of chloroacetamides in chlor(am)ination. Monochloroacetamide was the dominant chloroacetamide, which has not previously been reported and differed from the results reported for other precursors. In summary, AOM should be considered an important precursor for the formation of chloroacetamides. Fig. 2 Cl-HAcAm formation in chlorination AOMs extracted from different algae. 7682 | RSC Adv., 2017, 7, 7679-7687 This journal is

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“…The AOM released from Microcystis aeruginosa (M. aeruginosa) cells has been reported to serve as a source of precursors for disinfection byproducts (DBPs), not only carbonaceous disinfection byproducts (C-DBPs) such as trihalomethanes (THMs), halogen acetaldehyde (HAs), haloketone (HKs), and haloacetic acids (HAAs), but also nitrogenous disinfection byproducts (N-DBPs) such as haloacetonitriles (HANs), haloacetamides (HAcAms), and halogenated nitromethane (HNMs) (Plummer and Edzwald, 2001;Huang et al, 2009;Zhou et al, 2014aZhou et al, , 2015Zhu et al, 2015). The formation potential of various C-DBPs and N-DBPs has been studied in detail for the chlorination of AOM extracted from algal cells (Lui et al, 2011;Yang et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Prechlorination of algae-laden water: The effects of transportation time on cell integrity, algal organic matter release, and chlorinated disinfection byproduct formation

Lan

Liu

et al. 2016

Water Research

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a b s t r a c tThe prechlorination-induced algal organic matter (AOM) released from Microcystis aeruginosa (M. aeruginosa) cells has been reported to serve as a source of precursors for chlorinated disinfection byproducts (DBPs). However, previous studies have mainly focused on the precursors either extracted directly from the cell suspension or derived immediately after algal suspension prechlorination. This study aims to investigate the impacts of water transportation time after algal suspension prechlorination on cell integrity, AOM release, and DBP formation during the dissolved phase chlorination. The damage to cell integrity after prechlorination was indicated to depend not only on chlorine dose but also on transportation time. The highest dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) values were observed at 2 mg/L chlorine preoxidation before transportation, but were obtained at 0.4 mg/L chlorine after 480-min simulated transportation. The variation of DON with transportation time was indicated to be mainly influenced by the small molecular weight nitrogenous organic compounds, such as amino acids. Additionally, formation of the corresponding chlorinated carbonaceous disinfection byproducts (C-DBPs) and nitrogenous disinfection byproducts (N-DBPs) during the dissolved phase chlorination showed the same variation tendency as DOC and DON respectively. The highest C-DBP (98.4 mg/L) and N-DBP (5.5 mg/L) values were obtained at 0.4 mg/L chlorine preoxidation after 480-min simulated transportation. Therefore, when prechlorination is applied for algae-laden water pretreatment, not only chlorine dose but also transportation time needs to be considered with regard to their effects on cell integrity, AOM release, and chlorinated DBP formation.

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Impact of pre-ozonation on disinfection by-product formation and speciation from chlor(am)ination of algal organic matter of Microcystis aeruginosa

Cited by 58 publications

References 43 publications

Formation of Disinfection Byproducts from Algal Organic Matter Exposed to Monochloramine: Effects of Monochloramine Dosages, pH, and Bromide Concentrations

Formation of Disinfection Byproducts from Algal Organic Matter Exposed to Monochloramine: Effects of Monochloramine Dosages, pH, and Bromide Concentrations

The formation of haloacetamides, as an emerging class of N-DBPs, from chlor(am)ination of algal organic matter extracted from Microcystis aeruginosa, Scenedesmus quadricauda and Nitzschia palea

Prechlorination of algae-laden water: The effects of transportation time on cell integrity, algal organic matter release, and chlorinated disinfection byproduct formation

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