School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China.
School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China; Engineering Research Centre for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan Textile University, Wuhan 430073, China.
Waste Manag. 2020 Apr 15;107:211-218. doi: 10.1016/j.wasman.2020.04.009. Epub 2020 Apr 16.
The anaerobic digestion of food waste, can result in large amounts of solid waste digestate, often without methods of disposal. In this study, a biochar was prepared from food waste digestate (FWD) by pyrolysis, and its potential to activate peroxymonosulfate (PMS) for the removal of pollutants from a simulated textile wastewater was evaluated. The results showed that the addition of biochar (0.5 g/L) and PMS (1 mM) to wastewater could remove >99% of a representative azo dye pollutant (reactive brilliant red X-3B, 1 g/L) within 10 min. The efficiency of this removal process was attributed to the catalytic sites in the biochar (graphitic carbon and nitrogen, pyridinium nitrogen and CO structures) which could activate PMS to produce reactive oxygen species (O, O, OH and SO). The results obtained in this study confirmed the activation potential of the biochar derived from FWD on PMS, providing an alternative utilization strategy for anaerobic FWD.
食物垃圾的厌氧消化会产生大量的固体垃圾消化物，而通常这些消化物没有处理方法。在这项研究中，通过热解从食物垃圾消化物（FWD）中制备了一种生物炭，并评估了其用于活化过一硫酸盐（PMS）以去除模拟纺织废水中污染物的潜力。结果表明，在废水中添加生物炭（0.5 g/L）和 PMS（1 mM）可以在 10 分钟内去除（1 g/L）代表性偶氮染料污染物（活性艳红 X-3B）的>99%。这种去除过程的效率归因于生物炭中的催化位点（石墨碳和氮、吡啶氮和 CO 结构），这些催化位点可以活化 PMS 以产生活性氧物质（O、O、OH 和 SO）。本研究的结果证实了源自 FWD 的生物炭对 PMS 的活化潜力，为厌氧 FWD 的另一种利用策略提供了依据。
