Characteristics of typical dissolved black carbons and their influence on the formation of disinfection by-products in chlor(am)ination

doi:10.1007/s11783-022-1585-9

Front. Environ. Sci. Eng.

2022, Vol. 16

Issue (12) : 150 https://doi.org/10.1007/s11783-022-1585-9

RESEARCH ARTICLE

Characteristics of typical dissolved black carbons and their influence on the formation of disinfection by-products in chlor(am)ination

Jinhui Liang, Peng Gao, Benhang Li, Longfei Kang, Li Feng, Qi Han, Yongze Liu, Liqiu Zhang(

)

Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, Beijing Forestry University, Beijing 100083, China

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Abstract

● The physicochemical and structural properties of DBC were characterized.

● The effects of DBC on DBPs and DBPFP generation during disinfection were evaluated.

● The DBPs and DBPFP generation during chlor(am)ination were compared.

Dissolved black carbon (DBC) released from biochar can be one of the potential disinfection by-products (DBPs) precursors in the dissolved organic matter pool. However, the physiochemical and structural properties of DBC and the effects on the development of DBPs and DBP formation potential (DBPFP) during the disinfection process remain unclear. In this study, the characteristics of two kinds of DBC, namely, animal-derived DBC (poultry litter DBC, PL-DBC) and plant-derived DBC (wheat straw DBC, WS-DBC), were investigated. The effects of different kinds of DBC on the evolution of DBPs and DBPFP in chlorine and chloramine disinfection processes were compared with natural organic matter (NOM). The results showed that the total DBPs concentrations derived from PL-DBC, WS-DBC and NOM were similar during chlorination (i.e., 61.23 μg/L, 64.59 μg/L and 64.66 μg/L, respectively) and chloramination (i.e., 44.63 μg/L, 44.42 μg/L and 45.58 μg/L, respectively). The lower total DBPs and DBPFP concentrations in chloramination could be attributed to the fact that the introduction of ammonia in chloramine inhibited the breaking of the bond between the disinfectant and the active group of the precursor. Additionally, DBC presented much lower total DBPFP concentrations than NOM in both chlorination and chloramination. However, both kinds of DBC tended to form more monochloroacetic acids and haloacetamides than NOM, which could result from the higher organic strength, higher protein matter, and nitrogen-rich soluble microbial products of DBC.

Keywords Dissolved black carbon (DBC) Chlorine Chloramine Disinfection by-products (DBPs) Disinfection by-products formation potential (DBPFP)

Corresponding Author(s): Liqiu Zhang

Issue Date: 09 June 2022

Cite this article:

Jinhui Liang,Peng Gao,Benhang Li, et al. Characteristics of typical dissolved black carbons and their influence on the formation of disinfection by-products in chlor(am)ination[J]. Front. Environ. Sci. Eng., 2022, 16(12): 150.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-022-1585-9
https://academic.hep.com.cn/fese/EN/Y2022/V16/I12/150

Fig.1 The H/C and O/C of (a) WS-DBC and (b) PL-DBC.

Tab.1 Specific parameters of WS-DBC, PL-DBC and NOM

Fig.2 3D-EEM of WS-DBC (a), PL-DBC (b) and NOM (c).

Tab.2 Average fluorescence intensities of WS-DBC, PL-DBC and NOM

Fig.3 Concentrations of DBPs and DBPFP in the presence of WS-DBC, PL-DBC and NOM during the chlorine disinfection process: (a) WS-DBC; (b) PL-DBC; (c) NOM; (d) DBPFP.

Fig.4 Concentrations of DBPs and DBPFP in the presence of WS-DBC, PL-DBC and NOM during the chlorine disinfection process: (a) Total DBPs; (b) TCM; (c) HAAs; (d) HANs; (e) HAcAms

Fig.5 Concentrations of DBPs and DBPFP in the presence of WS-DBC, PL-DBC and NOM during the chloramine disinfection process: (a) WS-DBC; (b) PL-DBC; (c) NOM; (d) DBPFP.

Fig.6 Concentrations of DBPs and DBPFP in the presence of WS-DBC, PL-DBC and NOM during chloramine disinfection: (a) Total DBPs; (b) TCM; (c) HAAs; (d) HANs; (e) HAcAms.

Fig.7 Concentrations of total DBPs and DBPFP in the presence of WS-DBC, PL-DBC and NOM during the chlorine and chloramine disinfection processes.

Fig.8 Concentrations of DBPs and DBPFP in the presence of WS-DBC, PL-DBC and NOM during the chlorine and chloramine disinfection processes: (a) DBPs; (b) DBPFP.

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