NOx is unavoidably emitted during combustion in air at high temperature and/or pressure, which, if exceeding recommended levels, has a negative impact on the population. The authors found that when moist, limestone (CaCO3) readily sorbs NO2 to form calcium nitrate, which provides the basis for developing a surface flow filter. The substrate was made from “over-recycled” cellulose fibres such as newsprint, magazines, or packaging fibre, which are too weak to be used in further recycling. The substrate was specially-coated with fine-ground calcium carbonate and micro-nano-fibrillated cellulose, which was used as a binder and essential humectant to avoid formation of a stagnant air layer. Pre-oxidation countered the action of denitrification bacteria colonising the cellulose substrate. The by-product CO2 produced in situ during carbonate to nitrate conversion was adsorbed by perlite, which is an inert high surface-area additive. After use, the nitrate-rich CaCO3-cellulose-based filter was proposed to be mulched into a run-off resistant soil fertiliser and micronutrient suitable, e.g., for renewable forestry within the circular economy. Belgrade, Serbia, which is a highly polluted city, was used as a laboratory test bed, and NO2 was successfully removed from an inlet of city air. A construct of street-side self-draughting or municipal/commercial transport vehicle-exterior motion-draught filter boxes is discussed.

中文翻译：

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推出用于燃烧产生的 NOx 缓解形成植物营养素的回收来源的矿物-生物纤维素纤维复合材料：满足循环经济中的可持续发展目标

在高温和/或高压的空气中燃烧过程中不可避免地会排放 NOx，如果超过推荐水平，会对人口产生负面影响。作者发现，当潮湿时，石灰石 (CaCO3) 很容易吸收 NO2 形成硝酸钙，这为开发表面流过滤器提供了基础。基材由“过度回收”的纤维素纤维制成，如新闻纸、杂志或包装纤维，这些纤维太弱而无法进一步回收利用。基材特别涂有精细研磨的碳酸钙和微纳米原纤化纤维素，用作粘合剂和必需的保湿剂，以避免形成停滞的空气层。预氧化抵消了定植纤维素基质的反硝化细菌的作用。在碳酸盐到硝酸盐转化过程中原位产生的副产品 CO2 被珍珠岩吸附，珍珠岩是一种惰性高表面积添加剂。使用后，建议将富含硝酸盐的 CaCO3 纤维素基过滤器覆盖到耐径流土壤肥料和微量营养素中，例如适用于循环经济中的可再生林业。塞尔维亚贝尔格莱德是一个污染严重的城市，它被用作实验室试验台，成功地从城市空气的入口中去除了二氧化氮。讨论了街边自吸式或市政/商业运输车辆-外部运动-吸风式过滤器箱的构造。建议将富含硝酸盐的 CaCO3 纤维素过滤器覆盖到耐径流土壤肥料和微量营养素中，例如适用于循环经济中的可再生林业。塞尔维亚贝尔格莱德是一个污染严重的城市，它被用作实验室试验台，成功地从城市空气的入口中去除了二氧化氮。讨论了街边自吸式或市政/商业运输车辆-外部运动-吸风式过滤器箱的构造。建议将富含硝酸盐的 CaCO3 纤维素过滤器覆盖到耐径流土壤肥料和微量营养素中，例如适用于循环经济中的可再生林业。塞尔维亚贝尔格莱德是一个污染严重的城市，它被用作实验室试验台，成功地从城市空气的入口中去除了二氧化氮。讨论了街边自吸式或市政/商业运输车辆-外部运动-吸风式过滤器箱的构造。