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New sustainable utilization approach of livestock manure: Conversion to dual-reaction-center Fenton-like catalyst for water purification
npj Clean Water ( IF 10.4 ) Pub Date : 2022-09-29 , DOI: 10.1038/s41545-022-00200-2
Yingtao Sun , Chun Hu , Lai Lyu

Rural pollution is largely caused by the accumulation of waste biomass, such as livestock manure and crop straw, which is extremely difficult to dispose of due to the simultaneous need to non-destructively treat metal and organic matter. Untreated fecal waste fluxes have contributed to more than 870,000 sanitation-related deaths annually worldwide. The existing disposal methods are accompanied by large amounts of energy and resource consumption and GHG emissions, which are not conducive to achieving the UN Sustainable Development Goals (SDGs). Herein, we pioneer a new approach to sustainable resource utilization by subjecting unprocessed livestock manure to a Dual-Reaction-Center (DRC) Fenton-like catalyst directly through the ordered bonding of intrinsic metal-organic species via an in situ 2-stage calcination-annealing process with zero emissions and zero pollution. The directional electron transfers along with the generated metal cation–π interactions during the resourcelized process led to the formation of electron-rich/-poor microregions. Through triggering by a small amount of hydrogen peroxide (H2O2), the removal of refractory pollutants reaches 100% within a very short time in this system, which also shows a long-term purification effect on actual wastewater, accompanied by the utilization of intrinsic energy from the pollutants and dissolved oxygen. This study is expected to advance the resource utilization of rural waste and the sustainable development of environmental factors.



中文翻译:

畜禽粪便可持续利用新途径:转化为双反应中心类芬顿催化剂用于水净化

农村污染主要是由牲畜粪便和农作物秸秆等废弃生物质的积累造成的,由于同时需要对金属和有机物进行无损处理,因此处理起来极其困难。未经处理的粪便废物通量每年导致全球超过 870,000 例与卫生相关的死亡。现有的处置方式伴随着大量的能源资源消耗和温室气体排放,不利于实现联合国可持续发展目标(SDGs)。在此,我们开创了一种可持续资源利用的新方法,将未加工的牲畜粪便直接通过本征金属-有机物质的有序键合,直接置于双反应中心 (DRC) 类芬顿催化剂中零排放、零污染的原位两级煅烧-退火工艺。在资源化过程中,定向电子转移以及产生的金属阳离子-π相互作用导致了富电子/贫电子微区的形成。该系统通过少量过氧化氢(H 2 O 2)触发,在极短的时间内对难降解污染物的去除率达到100%,对实际废水也显示出长期的净化效果,同时利用来自污染物和溶解氧的内在能量。该研究有望促进农村废弃物资源化利用和环境因素的可持续发展。

更新日期:2022-09-29
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