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Extensive production and evolution of free radicals during composting
Bioresource Technology ( IF 9.7 ) Pub Date : 2022-06-17 , DOI: 10.1016/j.biortech.2022.127491 Ruizhi Xing 1 , Xinggui Yang 1 , Hanyue Sun 1 , Xiaoyu Ye 1 , Hanpeng Liao 1 , Shuping Qin 1 , Zhi Chen 1 , Shungui Zhou 1
Bioresource Technology ( IF 9.7 ) Pub Date : 2022-06-17 , DOI: 10.1016/j.biortech.2022.127491 Ruizhi Xing 1 , Xinggui Yang 1 , Hanyue Sun 1 , Xiaoyu Ye 1 , Hanpeng Liao 1 , Shuping Qin 1 , Zhi Chen 1 , Shungui Zhou 1
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The production of free radicals has been widely documented in natural systems, where they play an important role in most organic matter and contaminants transformation. Here, the production and evolution of free radicals were systematically investigated during composting. Results indicated that multiple reactive oxygen species and environmentally persistent free radicals (G-factor 2.003–2.004) were generated with dynamic changes during composting. The OH yield fluctuated significantly with a maximum content of 365.7–1,262.3 μmol/kg at the thermophilic phase of composting, which was closely correlated with the changes of Fe (II) (Pearson’s r = 0.928–0.932) and the electron-donating capacity of humus (Pearson’s r = 0.958–0.896) during composting. Further investigation suggested that microorganisms driven iron/humus redox conversion could contribute to the production and dynamic changes of free radical during composting. These findings highlight the abiotic processes involving free radicals, and provide a new perspective for humification and contaminants removal during composting.
中文翻译：
堆肥过程中自由基的大量产生和演变
自由基的产生在自然系统中已被广泛记录，它们在大多数有机物和污染物的转化中发挥着重要作用。在这里，系统地研究了堆肥过程中自由基的产生和演变。结果表明，堆肥过程中会动态变化产生多种活性氧和环境持久性自由基（G因子2.003-2.004）。堆肥高温阶段的OH产量波动较大，最高含量为365.7~1,262.3 μmol/kg，与Fe(II)的变化（Pearson's r = 0.928~0.932）和堆肥给电子能力密切相关。堆肥过程中的腐殖质（Pearson r = 0.958–0.896）。进一步的研究表明，微生物驱动的铁/腐殖质氧化还原转化可能有助于堆肥过程中自由基的产生和动态变化。这些发现强调了涉及自由基的非生物过程，并为堆肥过程中的腐殖化和污染物去除提供了新的视角。
更新日期：2022-06-17
中文翻译：
堆肥过程中自由基的大量产生和演变
自由基的产生在自然系统中已被广泛记录，它们在大多数有机物和污染物的转化中发挥着重要作用。在这里，系统地研究了堆肥过程中自由基的产生和演变。结果表明，堆肥过程中会动态变化产生多种活性氧和环境持久性自由基（G因子2.003-2.004）。堆肥高温阶段的OH产量波动较大，最高含量为365.7~1,262.3 μmol/kg，与Fe(II)的变化（Pearson's r = 0.928~0.932）和堆肥给电子能力密切相关。堆肥过程中的腐殖质（Pearson r = 0.958–0.896）。进一步的研究表明，微生物驱动的铁/腐殖质氧化还原转化可能有助于堆肥过程中自由基的产生和动态变化。这些发现强调了涉及自由基的非生物过程，并为堆肥过程中的腐殖化和污染物去除提供了新的视角。
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