Water quality and periphyton functional response to input of dissolved manure-derived hydrochars (DHCs)
文献类型： 外文期刊
作者： Li, Qiaoqiao 1 ; Wang, Bingyu 1 ; Zhang, Qiuyue 1 ; Huang, Junxia 1 ; Ding, Shudong 2 ; Xie, Huifang 1 ; Feng, Yanfang 2 ;
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.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Key Lab Agroenvironm Downstream Yangtze Plain, Natl Agr Expt Stn Agr Environm,Minis Agr & Rural A, Nanjing 210014, Peoples R China
3.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212001, Peoples R China
关键词： Hydrothermal carbonization; Hydrochar; Dissolved components; Periphyton function; Water quality
期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.91； 五年影响因子：8.549 ）
ISSN： 0301-4797
年卷期： 2022 年 318 卷
页码：
收录情况： SCI
摘要： Dissolved organic matter (DOM) plays a critical role in the global carbon cycle and provides food and energy for aquatic organisms. Recently, hydrochar, as a solid carbonaceous substance derived from hydrothermal carbonization, has been increasingly used as a soil amendment. Upon entering the soil, dissolved components (DHCs) were released from hydrochar as exogenous DOM, finally entering the aquatic ecosystems by runoff, which participates in environmental geochemical processes. However, relevant reports revealing the response of the aquatic ecosystem to the input of DHCs remain insufficiently elucidated. For the first time, the fundamental features of DHCs and their influence on water quality and aquatic biological function were investigated in this study. DHCs at 260 ?C (DHC260) had lower yields, a greater [C/N], worse biodegradability, and larger humic acid relative amounts than did DHCs at 180 ?C (DHC180). The DHC structural alterations in periphytonincubated aquatic ecosystems suggested that protein substances were more easily degraded or assimilated by periphyton, especially for DHC180, with rates of decrease of 34.5-63.5%. The increased chemical oxygen demand (COD) degradation in the DHC260 treatments was most likely due to humic acid substances with higher COD equivalents. Furthermore, DHC260 caused phosphorus to accumulate in periphyton, reducing aquatic phosphorus concentration. Notably, the abundances of Flavobacteria and Cyanobacteria associated with water blooms increased 12.7-25.5-and 1.3-8.3-fold, respectively; consequently, the promotional impact of DHCs on algal blooms should be considered. This result extends the nonnegligible role of DHCs in aquatic ecosystems and underlines the need to regulate the hydrochar application process.
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