Comparison of free amino acids and short oligopeptides for the formation of trihalomethanes and haloacetonitriles during chlorination: Effect of peptide bond and pre-oxidation

Chu, Wenhai; Li, Dongmei; Gao, Naiyun; Yin, Daqiang; Zhang, Yanshen; Zhu, Yanping

doi:10.1016/j.cej.2015.07.005

Cited by 66 publications

(30 citation statements)

References 53 publications

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“…and TCAcAm were all gradually increased with increasing chloramine dose, which can be explained by their degradation rates being low in the presence of NH2Cl. The pH-dependent variation of CF in this study was consistent with previous research that has shown CF formation increasing with pH [52,53]. However, the pH also affects the stability of DCAN, DCAcAm, and TCAcAm, which undergo base-catalyzed hydrolytic decomposition [45,48,54].…”

Section: Resultssupporting

confidence: 90%

Formation and estimated toxicity of trihalomethanes, haloacetonitriles, and haloacetamides from the chlor(am)ination of acetaminophen

Ding

Chu

Bond

et al. 2018

Journal of Hazardous Materials

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Section: Resultssupporting

confidence: 90%

Formation and estimated toxicity of trihalomethanes, haloacetonitriles, and haloacetamides from the chlor(am)ination of acetaminophen

Ding

Chu

Bond

et al. 2018

Journal of Hazardous Materials

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“…HANs are commonly derived from a single pathway and oxidation disrupts their formation pathway. This result is in agreement with previous reports [17,37]. TCNM formation during 24 h post-chlorination of AAs after 30 min pre-oxidation is depicted in C1, C2, and C3 (Figure 2).…”

Section: Han and Tcnm Formation During Pre-oxidation Subsequent Chlorsupporting

confidence: 94%

“…Trichloronitromethane (TCNM) is the most important HNM that is often identified in chlorinated water [13,14].Nitrogenous organic compounds (NOC) play an important role in providing precursors to generate N-DBPs, such as HANs and HNMs, during chlorination [15,16]. Amino acids (AAs) are the most studied subclass of NOC; they are found widely in fresh waters and are difficult to remove using traditional drinking water treatment processes [17]. In natural river water, the concentration of total dissolved AAs was found to be 100-500 µg/L, and yet it can rise to 300-6000 µg/L in eutrophic lakes [18].…”

mentioning

confidence: 99%

Effects of Pre-Oxidation on Haloacetonitrile and Trichloronitromethane Formation during Subsequent Chlorination of Nitrogenous Organic Compounds

Wang

Lin

Shen

et al. 2020

IJERPH

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The reaction between organic matter and disinfectants leads to the formation of disinfection byproducts (DBPs) in drinking water. With the improvement of detection technology and in-depth research, more than 1000 kinds of DBPs have been detected in drinking water. Nitrogenous DBPs (N-DBPs) are more genotoxic and cytotoxic than the regulated DBPs. The main methods are enhanced coagulation, pretreatment, and depth technologies which based are on conventional technology. Amino acids (AAs) are widely found in surface waters and play an important role by providing precursors from which toxic nitrogenous disinfection by-products (N-DBPs) are generated in chlorinated drinking water. The formation of N-DBPs, including dichloroacetonitrile, trichloroacetonitrile, and trichloronitromethane (TCNM), was investigated by analyzing chlorinated water using ozone (OZ), permanganate (PM), and ferrate (Fe(VI)) pre-oxidation processes. This paper has considered the control of pre-oxidation over N-DBPs formation of AAs, OZ, PM, and Fe(VI) pre-oxidation reduced the haloacetonitrile formation in the downstream chlorination. PM pre-oxidation decreased the TCNM formation during the subsequent chlorination, while Fe(VI) pre-oxidation had no significant influence on the TCNM formation, and OZ pre-oxidation increased the formation. OZ pre-oxidation formed the lowest degree of bromine substitution during subsequent chlorination of aspartic acid in the presence of bromide. Among the three oxidants, PM pre-oxidation was expected to be the best choice for reducing the estimated genotoxicity and cytotoxicity of the sum of the measured haloacetonitriles (HANs) and TCNM without bromide. Fe(VI) pre-oxidation had the best performance in the presence of bromide.

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“…The yield of TCM gradually increased as the pH increased from 5 to 9 during chlorination of TC ( Fig. 1 e), which agreed with previous research ( Chu et al., 2015 ; Zhou et al., 2014 ). However, the DCAcAm yield decreased from 23.58% to 4.39% as the pH increased.…”

Section: Resultssupporting

confidence: 92%

Tetracycline antibiotics as precursors of dichloroacetamide and other disinfection byproducts during chlorination and chloramination

Shao

Huang

et al. 2021

Chemosphere

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Pollution of natural water and even source water with pharmaceuticals is problematic worldwide and raises concern about the possibility of disinfection byproduct (DBP) formation during subsequent water treatment. In this study, the formation of DBPs, especially dichloroacetamide (DCAcAm), was investigated during chlorination and chloramination of tetracyclines, which are a class of broad-spectrum antibiotics. DBPs including DCAcAm were formed during chlorination and chloramination of tetracycline (TC). Although the concentrations and theoretical cytotoxicity of the DBPs formed from TC were affected by the contact time, disinfectant dose, and pH, DCAcAm was the main contributor determining the yields and cytotoxicity of the measured DBPs. The DCAcAm yields from four tetracycline antibiotics ranged from 0.43% to 54.26% for chlorination. For chloramination, the DCAcAm yields reached 44.57%, and the nitrogen in DCAcAm mainly came from tetracycline antibiotics rather than chloramines. ClO 2 pre-oxidation and UV photolysis decreased DCAcAm formation during chlorination and chloramination of TC. The high yields observed in this study suggest that tetracycline antibiotics are possible precursors of DCAcAm.

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Comparison of free amino acids and short oligopeptides for the formation of trihalomethanes and haloacetonitriles during chlorination: Effect of peptide bond and pre-oxidation

Cited by 66 publications

References 53 publications

Formation and estimated toxicity of trihalomethanes, haloacetonitriles, and haloacetamides from the chlor(am)ination of acetaminophen

Formation and estimated toxicity of trihalomethanes, haloacetonitriles, and haloacetamides from the chlor(am)ination of acetaminophen

Effects of Pre-Oxidation on Haloacetonitrile and Trichloronitromethane Formation during Subsequent Chlorination of Nitrogenous Organic Compounds

Tetracycline antibiotics as precursors of dichloroacetamide and other disinfection byproducts during chlorination and chloramination

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