Dining lampblack as a source of atmospheric pollution,urban residents had to spend a lot of economic costs all year round to solve its impact.However,traditional treatment methods often carry the risk of secondary pol...Dining lampblack as a source of atmospheric pollution,urban residents had to spend a lot of economic costs all year round to solve its impact.However,traditional treatment methods often carry the risk of secondary pollution.The use of phase change absorption solvent(PCAS)controlled by CO_(2)can effectively absorb the oily components in dining lampblack,and smoothly avoid the generation of secondary pollutants and squandering of resources.The reversibility of PCASs under CO_(2)control was explained by pH changes and macroscopic visualizations.The absorption effects of favorable absorbents and PCASs on dining lampblack were compared and analyzed.The fatty acid(FA)in the oil absorption mixture was desorbed by interacting with D230.The results of GC/MS analysis on the oil components separated by desorption showed that the desorption of PCASs was effective for these refractory oil components.FAs can be enriched and applied to the subsequent dining lampblack treatment link to realize the waste recycling.In addition,the absorption and desorption of oily components by PCASs were combined with the CO_(2)-controlled phase transformation of PCASs itself to achieve the absorption circulation of treating dining lampblack by using PCASs.展开更多
基于大宗固体废物利用,以甲基丙烯酸甲酯(MMA)、废有机玻璃、过氧化苯甲酰(BPO)、粉煤灰、木屑、氢氧化镁[Mg(OH)2]和乙烯-醋酸乙烯共聚物(EVA)树脂为原料,溶解、共混、聚合三步研究一种回收利用率高、回收过程节能环保、成本低廉和附...基于大宗固体废物利用,以甲基丙烯酸甲酯(MMA)、废有机玻璃、过氧化苯甲酰(BPO)、粉煤灰、木屑、氢氧化镁[Mg(OH)2]和乙烯-醋酸乙烯共聚物(EVA)树脂为原料,溶解、共混、聚合三步研究一种回收利用率高、回收过程节能环保、成本低廉和附加值高的废有机玻璃回收再利用方法。并且对有机玻璃板材阻燃性能和力学性能进行研究。结果表明,Mg(OH)2的加入量为30%、EVA树脂的加入量为4.5%,有机玻璃板材的阻燃级别为HB级,板材的硬度为91HD、冲击强度为4.75 k J/m2,弯曲强度为47 MPa。展开更多
Alkaline zinc manganese dioxide（Zn–MnO2）batteries are widely used in everyday life. Recycling of waste alkaline Zn–MnO2 batteries has always been a hot environmental concern. In this study, a simple and costeffect...Alkaline zinc manganese dioxide（Zn–MnO2）batteries are widely used in everyday life. Recycling of waste alkaline Zn–MnO2 batteries has always been a hot environmental concern. In this study, a simple and costeffective process for synthesizing Mn3O4/carbon nanotube（CNT） nanocomposites from recycled alkaline Zn–MnO2 batteries is presented. Manganese oxide was recovered from spent Zn–MnO2 battery cathodes. The Mn3O4/CNT nanocomposites were produced by ball milling the recovered manganese oxide in a commercial multi-wall carbon nanotubes（MWCNTs） solution. Scanning electron microscopy（SEM） analysis demonstrates that the nanocomposite has a unique three-dimensional（3D） bird nest structure. Mn3O4 nanoparticles are homogeneously distributed on MWCNT framework. Mn3O4/CNT nanocomposites were evaluated as an anode material for lithium-ion batteries, exhibiting a highly reversible specific capacitance of -580 mA h·g^-1 after 100 cycles. Moreover, Mn3O4/CNT nanocomposite also shows a fairly positive onset potential of -0.15 V and quite high oxygen reducibility when considered as an electrocatalyst for oxygen reduction reaction.展开更多
基金supported by the Chengdu Science and Technology Project of the Chengdu Bureau of Science and Technology(2021-YF05-00194-SN)the Foundation of Department of Science and Technology of Sichuan Province(2022NSFSC0203)。
文摘Dining lampblack as a source of atmospheric pollution,urban residents had to spend a lot of economic costs all year round to solve its impact.However,traditional treatment methods often carry the risk of secondary pollution.The use of phase change absorption solvent(PCAS)controlled by CO_(2)can effectively absorb the oily components in dining lampblack,and smoothly avoid the generation of secondary pollutants and squandering of resources.The reversibility of PCASs under CO_(2)control was explained by pH changes and macroscopic visualizations.The absorption effects of favorable absorbents and PCASs on dining lampblack were compared and analyzed.The fatty acid(FA)in the oil absorption mixture was desorbed by interacting with D230.The results of GC/MS analysis on the oil components separated by desorption showed that the desorption of PCASs was effective for these refractory oil components.FAs can be enriched and applied to the subsequent dining lampblack treatment link to realize the waste recycling.In addition,the absorption and desorption of oily components by PCASs were combined with the CO_(2)-controlled phase transformation of PCASs itself to achieve the absorption circulation of treating dining lampblack by using PCASs.
文摘基于大宗固体废物利用,以甲基丙烯酸甲酯(MMA)、废有机玻璃、过氧化苯甲酰(BPO)、粉煤灰、木屑、氢氧化镁[Mg(OH)2]和乙烯-醋酸乙烯共聚物(EVA)树脂为原料,溶解、共混、聚合三步研究一种回收利用率高、回收过程节能环保、成本低廉和附加值高的废有机玻璃回收再利用方法。并且对有机玻璃板材阻燃性能和力学性能进行研究。结果表明,Mg(OH)2的加入量为30%、EVA树脂的加入量为4.5%,有机玻璃板材的阻燃级别为HB级,板材的硬度为91HD、冲击强度为4.75 k J/m2,弯曲强度为47 MPa。
基金financially supported by the National Natural Science Foundation of China(Nos.21671096 and 21603094)the Shenzhen Peacock Plan(No.KQCX2014052215 0815065)+1 种基金the Natural Science Foundation of Shenzhen(Nos.JCYJ20150630145302231 and JCYJ20150331101823677)the Science and Technology Innovation Foundation for the Undergraduates of South University of Science and Technology of China(Nos.2016S10,2016S20,2015x19 and 2015x12)
文摘Alkaline zinc manganese dioxide（Zn–MnO2）batteries are widely used in everyday life. Recycling of waste alkaline Zn–MnO2 batteries has always been a hot environmental concern. In this study, a simple and costeffective process for synthesizing Mn3O4/carbon nanotube（CNT） nanocomposites from recycled alkaline Zn–MnO2 batteries is presented. Manganese oxide was recovered from spent Zn–MnO2 battery cathodes. The Mn3O4/CNT nanocomposites were produced by ball milling the recovered manganese oxide in a commercial multi-wall carbon nanotubes（MWCNTs） solution. Scanning electron microscopy（SEM） analysis demonstrates that the nanocomposite has a unique three-dimensional（3D） bird nest structure. Mn3O4 nanoparticles are homogeneously distributed on MWCNT framework. Mn3O4/CNT nanocomposites were evaluated as an anode material for lithium-ion batteries, exhibiting a highly reversible specific capacitance of -580 mA h·g^-1 after 100 cycles. Moreover, Mn3O4/CNT nanocomposite also shows a fairly positive onset potential of -0.15 V and quite high oxygen reducibility when considered as an electrocatalyst for oxygen reduction reaction.
