磷石膏(PG)是湿法磷酸工艺中的固废产物,且堆积量较为庞大,了解磷石膏的处理方法及应用现状,可以为该领域的一线科研人员提供研发思路借鉴。运用文献计量学方法,统计了2000~2024年Web of Science(WoS)核心数据库和中国知网(CNKI)核心数...磷石膏(PG)是湿法磷酸工艺中的固废产物,且堆积量较为庞大,了解磷石膏的处理方法及应用现状,可以为该领域的一线科研人员提供研发思路借鉴。运用文献计量学方法,统计了2000~2024年Web of Science(WoS)核心数据库和中国知网(CNKI)核心数据库的相关文献进行了检索分析,深入剖析了PG应用现状、热点趋势,并对国内外各自的发展提出重点研究方向,以期为PG的资源化利用提供解决思路。结果显示:2000~2024年,国内外关于PG应用的发文量逐年上升,累计达到6408篇,PG的研究内容主要为应用过程中的杂质元素影响,其中经改性处理和掺混其他物质后,应用至建筑领域的研究愈发火热。国外初期研究注重放射性元素对环境的影响,中期注重稀土元素的提取,而国内初期研究侧重于生产化学产品,中期侧重于建筑领域应用研究,近期国内外都开始注重PG的机械强度性能测试。相较于国外PG应用行业较为集中,国内PG的应用研究注重多行业共同发展。展开更多
The conversion of waste resources into fertilizer represents a crucial strategy for optimizing waste utilization and attaining"carbon peak and neutrality"objectives.This approach not only effectively mitigat...The conversion of waste resources into fertilizer represents a crucial strategy for optimizing waste utilization and attaining"carbon peak and neutrality"objectives.This approach not only effectively mitigates greenhouse gas emissions but also enhances the organic matter content in soil,thereby supporting the advancement of sustainable agriculture.Currently,the principal fertilizer production technologies utilizing solid waste resources encompass hydrothermal fertilizer production,aerobic fermentation,wrapping fertilizer production,micro-storage fertilizer production,and biochemical rapid decomposition.This paper examines the applicability and limitations of these technologies in practical contexts,and anticipates their developmental trends and future prospects.It aims to offer practical guidance and constructive support for the resource utilization of solid waste and the sustainable development of related industries.展开更多
In this study,we developed a tandem photo-assisted electrochemical(PA-EC)chemical strategy for both energy-saving ammonia/fertilizer synthesis and comprehensive nitrogen-and phosphorus-rich wastewater treatment,in whi...In this study,we developed a tandem photo-assisted electrochemical(PA-EC)chemical strategy for both energy-saving ammonia/fertilizer synthesis and comprehensive nitrogen-and phosphorus-rich wastewater treatment,in which synchronous hypophosphite ion(H_(2)PO_(2)^(-))oxidation to phosphate ion(PO_(4)^(3–))(POR)and nitrate reduction(NO_(3)RR)to ammonia(NH_(3))occur,followed by cascade chemical precipitation to generate struvite.Herein,a bifunctional Cu_(2)O@NiFe_(2)O_(4)Z-scheme heterojunction with a yolk/shell structure and oxygen vacancies(OVs)was designed and developed to optimize the NO_(3)RR/POR.Serving as a key component,the established PA-EC system consisted of a Janus Cu_(2)O@NiFe_(2)O_(4)/NF self-supporting integrated photocathode and a Cu_(2)O@NiFe_(2)O_(4)/NF photocathode with efficient struvite PA-EC synthesis performance under a low cell voltage of 1.6 V vs NHE.Specifically,Janus Cu_(2)O@NiFe_(2)O_(4)/NF photocathode exhibits superior performance with a high NH3 yield of 38.06 mmol L^(-1)and a faradaic efficiency(FE)of 92.31%at 1.6 V vs.NHE and enables ammonia FE over 60%in a broad NO_(3)–concentration window of 0.005–0.5 mol L^(-1).The photoassisted electrochemical catalytic mechanism and reaction pathway for struvite synthesis on Cu_(2)O@NiFe_(2)O_(4)were investigated through a series of experiments and theoretical calculations.The results demonstrated the critical roles of the interfacial electric field,void confinement,and oxygen vacancies in promoting the overall catalytic efficiency.These encouraging results warrant further studies on combined P and N recovery for efficient production of valuable fertilizers.展开更多
文摘磷石膏(PG)是湿法磷酸工艺中的固废产物,且堆积量较为庞大,了解磷石膏的处理方法及应用现状,可以为该领域的一线科研人员提供研发思路借鉴。运用文献计量学方法,统计了2000~2024年Web of Science(WoS)核心数据库和中国知网(CNKI)核心数据库的相关文献进行了检索分析,深入剖析了PG应用现状、热点趋势,并对国内外各自的发展提出重点研究方向,以期为PG的资源化利用提供解决思路。结果显示:2000~2024年,国内外关于PG应用的发文量逐年上升,累计达到6408篇,PG的研究内容主要为应用过程中的杂质元素影响,其中经改性处理和掺混其他物质后,应用至建筑领域的研究愈发火热。国外初期研究注重放射性元素对环境的影响,中期注重稀土元素的提取,而国内初期研究侧重于生产化学产品,中期侧重于建筑领域应用研究,近期国内外都开始注重PG的机械强度性能测试。相较于国外PG应用行业较为集中,国内PG的应用研究注重多行业共同发展。
基金Supported by National Undergraduate Training Programs for Innovation and Entrepreneurship(X202510580088)Special Project for Promoting the Coordinated Development of Urban and Rural Areas and Regions by Introducing Scientific and Technological Achievements of Guangdong Province into Counties and Towns(2025B0202010051)Project of High-quality Development in Hundred Counties,Thousands Towns and Ten Thousand Villages of Guangdong Provincial Department of Science and Technology:Key Dispatch Project for Rural Science and Technology Commissioners(KTP20240704).
文摘The conversion of waste resources into fertilizer represents a crucial strategy for optimizing waste utilization and attaining"carbon peak and neutrality"objectives.This approach not only effectively mitigates greenhouse gas emissions but also enhances the organic matter content in soil,thereby supporting the advancement of sustainable agriculture.Currently,the principal fertilizer production technologies utilizing solid waste resources encompass hydrothermal fertilizer production,aerobic fermentation,wrapping fertilizer production,micro-storage fertilizer production,and biochemical rapid decomposition.This paper examines the applicability and limitations of these technologies in practical contexts,and anticipates their developmental trends and future prospects.It aims to offer practical guidance and constructive support for the resource utilization of solid waste and the sustainable development of related industries.
文摘In this study,we developed a tandem photo-assisted electrochemical(PA-EC)chemical strategy for both energy-saving ammonia/fertilizer synthesis and comprehensive nitrogen-and phosphorus-rich wastewater treatment,in which synchronous hypophosphite ion(H_(2)PO_(2)^(-))oxidation to phosphate ion(PO_(4)^(3–))(POR)and nitrate reduction(NO_(3)RR)to ammonia(NH_(3))occur,followed by cascade chemical precipitation to generate struvite.Herein,a bifunctional Cu_(2)O@NiFe_(2)O_(4)Z-scheme heterojunction with a yolk/shell structure and oxygen vacancies(OVs)was designed and developed to optimize the NO_(3)RR/POR.Serving as a key component,the established PA-EC system consisted of a Janus Cu_(2)O@NiFe_(2)O_(4)/NF self-supporting integrated photocathode and a Cu_(2)O@NiFe_(2)O_(4)/NF photocathode with efficient struvite PA-EC synthesis performance under a low cell voltage of 1.6 V vs NHE.Specifically,Janus Cu_(2)O@NiFe_(2)O_(4)/NF photocathode exhibits superior performance with a high NH3 yield of 38.06 mmol L^(-1)and a faradaic efficiency(FE)of 92.31%at 1.6 V vs.NHE and enables ammonia FE over 60%in a broad NO_(3)–concentration window of 0.005–0.5 mol L^(-1).The photoassisted electrochemical catalytic mechanism and reaction pathway for struvite synthesis on Cu_(2)O@NiFe_(2)O_(4)were investigated through a series of experiments and theoretical calculations.The results demonstrated the critical roles of the interfacial electric field,void confinement,and oxygen vacancies in promoting the overall catalytic efficiency.These encouraging results warrant further studies on combined P and N recovery for efficient production of valuable fertilizers.
