Unraveling the photochemical behavior of dissolved organic matter derived from hydrothermal carbonization process water: Insights from molecular transformation and photoactive species
文献类型： 外文期刊
作者： Xie, Huifang 1 ; Li, Qiaoqiao 1 ; Wang, Minli 2 ; Feng, Yanfang 3 ; Wang, Bingyu 1 ;
作者机构： 1.Nanjing Univ Sci & Technol, Sch Environm & Biol Engn, Jiangsu Key Lab Chem Pollut Control & Resources Re, Nanjing 210094, Peoples R China
2.Kunming Univ Sci & Technol, Fac Civil Engn & Mech, Kunming 650500, Peoples R China
3.Jiangsu Acad Agr Sci, Minist Agr & Rural Affairs, Inst Agr Resources & Environm, Key Lab Agroenvironm Downstream Yangtze Plain,Natl, Nanjing 210014, Peoples R China
关键词： Dissolved organic matter; Hydrothermal carbonization; Photochemical behavior; Photoactive species; Tetracycline
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）
ISSN： 0304-3894
年卷期： 2024 年 469 卷
页码：
收录情况： SCI
摘要： Hydrothermal carbonization process water (HTPW) has been utilized as a substitute for chemical fertilizers in agricultural applications. However, the input of HTPW into paddy water, particularly the significant proportion of dissolved organic matter (DOM) in HTPW (DOM-HTPW), directly engages in photochemical transformations, a phenomenon often overlooked. This study observed a consistent decrease in humification (SUVA280, 7.7-53.9%) and aromaticity (SUVA254, 6.1-40.0%) of DOM-HTPW after irradiation. The primary active photobleaching components of DOM-HTPW varied depending on the feedstock, such as protein for chicken manure DOM-HTPW and lignin for rice straw DOM-HTPW. The photochemical activity of DOM-HTPW was augmented by its lower molecular weight and higher hydrophilic composition, particularly evident in chicken manure DOM-HTPW, which exhibited higher generation rates for 1O2 (35.1-37.1%), 3DOM* (32.8-43.9%), and O2 center dot (28.6-48.8%) as measured by molecular probes. DOM-HTPW effectively facilitated the phototransformation of tetracycline,
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