New insights into enhanced anaerobic degradation of coal gasification wastewater (CGW) with the assistance of magnetite nanoparticles

被引：14
作者：
Ma, Wencheng [1 ]
Li, Jinxin [1 ]
Zhong, Dan [1 ]
Ge, Xiaoli [2 ]
Li, Kefei [1 ]
Dai, Changlei [3 ]
Gao, Yuehua [4 ]
机构：
[1] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, 73 Huanghe Rd, Harbin 150090, Peoples R China
[2] Tianjin Municipal Engn Design & Res Inst, Tianjin 300000, Peoples R China
[3] Heilongjiang Univ, Sch Hydraul & Elect Power, Harbin 150090, Peoples R China
[4] Jilin Zhong Yuan Architectural & Municipal Engn D, Jilin 130000, Jilin, Peoples R China
来源：
CHEMOSPHERE | 2021年 / 262卷
基金：
中国国家自然科学基金;
关键词：
Coal gasification wastewater; Anaerobic digestion; Magnetite nanoparticles; Microbial community; Enhancement mechanisms; INTERSPECIES ELECTRON-TRANSFER; SYNTROPHIC METABOLISM; MICROBIAL COMMUNITY; PERFORMANCE; SYSTEM; OXIDE;
D O I：
10.1016/j.chemosphere.2020.127872
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Magnetite nanoparticles (Fe3O4 NPs) was firstly used to enhance pollutants removal during coal gasification wastewater (CGW) treatment in anaerobic digestion (AD) system. Bench-scale results revealed that 200 mg/L and 20-40 nm of Fe3O4 NPs addition resulted in a maximum removal capacity of total phenol (TPh) at a temperature of 36 degrees C and hydraulic retention time (HRT) of 36 h. Meanwhile, Fe3O4 NPs addition reduced the oxidation reduction potential (ORP) values and biological toxicity, and enhanced the stability of AD system. Pilot-scale results showed that the TPh and chemical oxygen demand (COD) removal efficiency (53% and 49%) were obtained with the optimal dosage of Fe3O4 NPs. Moreover, electron nanowires may be established with Fe3O4 NPs assisted to perform direct interspecies electron transfer (DIET) among Geobacter, Pseudomonas and Methanosaeta species, and finally enhanced the pollutants removal efficiency. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：7
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