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Construction of a Novel Closed-Loop Livestock Waste Valorization Paradigm: Bridging Manure and Ammonia Gas via Phosphate-Doped Hydrochar
ACS ES&T Engineering ( IF 7.4 ) Pub Date : 2022-04-27 , DOI: 10.1021/acsestengg.2c00077 Zihan Wang 1 , Ziyun Liu 1 , Changbin Yuan 1 , Xiao Zhao 1 , Yuanhui Zhang 1 , Zhidan Liu 1
ACS ES&T Engineering ( IF 7.4 ) Pub Date : 2022-04-27 , DOI: 10.1021/acsestengg.2c00077 Zihan Wang 1 , Ziyun Liu 1 , Changbin Yuan 1 , Xiao Zhao 1 , Yuanhui Zhang 1 , Zhidan Liu 1
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Sustainable livestock production plays an important role in meeting the growing global demand for animal products. Livestock manure and odor emission are regarded as the major obstacles to the low-carbon livestock farming. In response, we propose a novel loop for the valorization of livestock wastes, via bridging manure and the typical odor NH3 with P-doped hydrochar. P-doped cow manure hydrochar was facilely prepared via hydrothermal carbonization followed by H3PO4 activation. The organic composition and crystallinity of hydrochar as the precursor, depending on hydrothermal severity, significantly impacted the subsequent H3PO4 activation behavior. The activated sample with modified surface exhibited favorable NH3 adsorption capacity in the dynamic adsorption experiment. Density functional theory calculation confirmed that the P-containing group improved the NH3 adsorption efficiency as the active site. X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy analyses demonstrated the oxidation of reduced phosphorus groups during NH3 adsorption in room temperature. Phosphorus species strengthened the immobilization of NH3 on the surface via Brønsted and Lewis-type acid–base interaction. This study provided a new strategy to develop a green NH3 adsorbent from the manure-based hydrochar, supporting the further investigation on the promising solution of odor control and waste valorization in livestock farms.
中文翻译：
构建新型闭环畜禽废弃物增值范式：通过磷酸盐掺杂水炭桥接粪肥和氨气
可持续畜牧生产在满足全球对动物产品日益增长的需求方面发挥着重要作用。畜禽粪便和臭气排放被认为是低碳畜牧业的主要障碍。作为回应，我们提出了一种用于牲畜废物增值的新循环，通过使用 P 掺杂水炭桥接粪肥和典型气味 NH 3 。P掺杂牛粪水炭通过水热碳化然后H 3 PO 4活化容易地制备。作为前体的水炭的有机组成和结晶度，取决于水热的严重程度，显着影响随后的 H 3 PO 4激活行为。表面改性的活化样品在动态吸附实验中表现出良好的NH 3吸附能力。密度泛函理论计算证实，含P基团作为活性位点提高了NH 3的吸附效率。X射线光电子能谱和傅里叶变换红外光谱分析表明，在室温下NH 3吸附过程中还原的磷基团被氧化。磷物质通过 Brønsted 和 Lewis 型酸碱相互作用加强了 NH 3在表面上的固定。本研究为开发绿色 NH 3提供了新策略来自粪便基水炭的吸附剂，支持进一步研究畜场气味控制和废物增值的有前景的解决方案。
更新日期：2022-04-27
中文翻译：
构建新型闭环畜禽废弃物增值范式：通过磷酸盐掺杂水炭桥接粪肥和氨气
可持续畜牧生产在满足全球对动物产品日益增长的需求方面发挥着重要作用。畜禽粪便和臭气排放被认为是低碳畜牧业的主要障碍。作为回应，我们提出了一种用于牲畜废物增值的新循环，通过使用 P 掺杂水炭桥接粪肥和典型气味 NH 3 。P掺杂牛粪水炭通过水热碳化然后H 3 PO 4活化容易地制备。作为前体的水炭的有机组成和结晶度，取决于水热的严重程度，显着影响随后的 H 3 PO 4激活行为。表面改性的活化样品在动态吸附实验中表现出良好的NH 3吸附能力。密度泛函理论计算证实，含P基团作为活性位点提高了NH 3的吸附效率。X射线光电子能谱和傅里叶变换红外光谱分析表明，在室温下NH 3吸附过程中还原的磷基团被氧化。磷物质通过 Brønsted 和 Lewis 型酸碱相互作用加强了 NH 3在表面上的固定。本研究为开发绿色 NH 3提供了新策略来自粪便基水炭的吸附剂，支持进一步研究畜场气味控制和废物增值的有前景的解决方案。
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