Formation of disinfection by-products during chlorination of organic matter from phoenix tree leaves and Chlorella vulgaris. (December 2018)

• Record Type: Journal Article
• Authors: Sun, Hongjie; Song, Xuhui; Ye, Ting; Hu, Junbiao; Hong, Huachang; Chen, Jianrong; Lin, Hongjun; Yu, Haiying
• Is Part Of: Environmental pollution. Volume 243(2018)Part B
• Page Start: 1887
• Page End: 1893
• Publication Date: 2018-12
• Subjects: Disinfection by-products (DBPs) -- Hydrophobicity -- Chlorination -- Leaf organic matter -- Algal organic matter; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2018.10.021
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstracts: To better understand the precursor of disinfection by-products (DBPs) and provide useful information for water utilities to manage the drinking water, a study of DBP formation was conducted through chlorination of leaf organic matter (OM) from phoenix tree and algal OM from Chlorella vulgaris . DBPs investigated include trichloromethane (TCM), trichloroacetic acid (TCAA), dichloroacetic acid (DCAA), chloroacetic acid (CAA), dichloroacetonitrile (DCAN) and trichloroacetonitrile (TCNM). Results show that the specific yields (μg/mg C) of C-DBPs (TCM, CAA, DCAA and TCAA) from leaf OM were higher but the specific yields of N-DBPs (DCAN and TCNM) were lower than those from algal OM. Correlation analysis revealed that C-DBPs yields (μg/L) were significantly (p < 0.01) interrelated with each other (r = 0.937–0.996), and for each C-DBP, the hydrophobic OM contributed more to their formation (61–90% of total yields) as compared with hydrophilic OM. In spite of these characteristics, an in-depth examination was conducted revealing that the hydrophobicity and aromaticity of C-DBPs precursors were in the order of TCAA > DCAA & TCM > CAA. DCAN precursors were highly variable: they were dominated by hydrophobic OM (leaf OM: 86%) or hydrophilic OM (algal OM: 61%). Hydrophilic OM was the most important precursor for TCNM (76–79% of total yields), followed by hydrophobic neutral and base substances (29–45% of total yields), but the hydrophobic acids exhibited an inhibition role in TCNM formation. Graphical abstract: Image 1 Highlights: Leaf OM and algal OM are important precursor for C-DBPs and N-DBPs, respectively. TCM, CAA, DCAA and TCM yields were most contributed by hydrophobic OM. Aromaticity and hydrophobicity of precursor are ranked as TCAA > DCAA, TCM > CAA. Order of contribution to TCNM yields: HiM > HoS, yet HoA acted an inhibition role. DCAN precursors are highly variable.