State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, PR China.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, PR China.
Bioresour Technol. 2024 Feb;394:130308. doi: 10.1016/j.biortech.2024.130308. Epub 2024 Jan 8.
In this study, two kinds of magnetic biochar (BC) were synthesized by loading Fe (FeBC) and Fe-Mn oxides (FMBC) and their effects on anaerobic phenolics degradation were investigated. Compared with BC/FMBC, FeBC addition achieved the superior phenolics biodegradation even for 3,5-xylenol. Compared with control, FeBC addition enhanced CH production by 100.1 % with the lag time shortened from 9.5 days to 6.6 days while it increased to 11.2 days with FMBC addition. FeBC addition activated adsorption-biodegradation and Fe (III) reduction with the improved electron transfer activity, adenosine triphosphate and cytochrome C concentrations. Abundant phenol degrading bacteria, electroactive bacteria, syntrophic partners could be enriched by FeBC addition, contributing to the enhanced benzoyl-CoA and methanogenesis pathways. However, this enhancement was inhibited by FMBC addition owing to the accumulation of reactive oxygen species. This study provided novel insights into the application of magnetic BC to enhanced anaerobic treatment of phenolic wastewater.
在这项研究中，通过负载 Fe（FeBC）和 Fe-Mn 氧化物（FMBC）合成了两种磁性生物炭（BC），并研究了它们对厌氧酚类降解的影响。与 BC/FMBC 相比，即使是 3,5-二甲酚，FeBC 的添加也实现了优越的酚类生物降解。与对照相比，FeBC 的添加将 CH4 产量提高了 100.1%，将滞后时间从 9.5 天缩短至 6.6 天，而 FMBC 的添加则增加到 11.2 天。FeBC 的添加通过提高电子转移活性、三磷酸腺苷和细胞色素 C 浓度，激活了吸附-生物降解和 Fe(III)还原。FeBC 的添加可以富集丰富的苯酚降解菌、电活性菌和共代谢伙伴，从而增强苯甲酰辅酶 A 和产甲烷途径。然而，由于活性氧的积累，FMBC 的添加抑制了这种增强。本研究为磁性 BC 应用于增强厌氧处理含酚废水提供了新的见解。
