To develop more efficient chemical methods for the demineralization of organic pollutants from water bodies, which one was also mimic to the nature, a degradation of methylene blue by Fe(Ⅲ) and H 2O 2 in the absenc...To develop more efficient chemical methods for the demineralization of organic pollutants from water bodies, which one was also mimic to the nature, a degradation of methylene blue by Fe(Ⅲ) and H 2O 2 in the absence of light instead of Fe(Ⅱ) and H 2O 2 was studied. Results showed that use of Fe (Ⅲ) is more promising than Fe(Ⅱ). The present study reflects that Fenton reaction is more efficient, in the presence of a small amount of salicylic acid is added which is a one of the priority pollutant.展开更多
The environmental conditions in steel industry were discussed in detail.It was also pointed out that it was necessary to reduce the quantity of waste generated and discharged by improving the raw material,energy struc...The environmental conditions in steel industry were discussed in detail.It was also pointed out that it was necessary to reduce the quantity of waste generated and discharged by improving the raw material,energy structure and consumption rate,and reinforcing the waste control and management.At the same time,the relevant mathematical models of environmental impact were set up on the basis of raw material consumption,energy consumption and waste generation and discharge in different technical routes of steelmaking.The result showed that the production route of DR-iron clearly has more environmental advantages over that of BF-hot metal.展开更多
Iron oxides and lead-zinc deposits in host rocks located in ten drainage basins in the coastal plain of the Red Sea,Egypt,have been subjected to important mining activities.The drainage basins were analyzed to estimat...Iron oxides and lead-zinc deposits in host rocks located in ten drainage basins in the coastal plain of the Red Sea,Egypt,have been subjected to important mining activities.The drainage basins were analyzed to estimate the transportations of these minerals. Fourteen soil samples and fifteen plant samples were collected from sites located in the basin and also in neighboring area and chemically analyzed.In展开更多
以磷酸铁锂电池为研究对象,综合考虑梯次利用比例、使用周期及电池容量等因素,设定不同梯次利用场景,采用生命周期评价方法量化退役动力电池在梯次利用及后续报废处置阶段的环境影响,并对不同梯次利用率情景下的碳减排量进行分析.结果表...以磷酸铁锂电池为研究对象,综合考虑梯次利用比例、使用周期及电池容量等因素,设定不同梯次利用场景,采用生命周期评价方法量化退役动力电池在梯次利用及后续报废处置阶段的环境影响,并对不同梯次利用率情景下的碳减排量进行分析.结果表明,与直接再生利用相比,储能、通信基站、低速电源三种梯次利用场景均表现为环境效益.其中,储能场景环境效益最大,其在气候变化、化石能源消耗、人体毒性-非致癌、陆地生态毒性指标等环境影响指标上均表现出相对优势.基于电池退役量和梯次利用去向,进一步计算出2023年全年磷酸铁锂电池梯次利用的碳减排量为1.05×10^(8) kg CO_(2)eq.当梯次利用率保持当前水平或以10%增长时,至2030年其全年碳减排量可达1.55×10^(9)kg CO_(2)eq.和5.98×10^(9)kg CO_(2)eq.,梯次利用具有良好的减污降碳环境表现.展开更多
氧化石墨烯(Graphene Oxide,GO)可以改善水泥基材料力学性能的良好特性可用来改性固废(铁尾矿砂、再生粗骨料)混凝土。研究对再生粗骨料取代率、铁尾矿砂取代率和GO掺量3个因素设计了正交试验。引入考虑固废利用率的权重指标对GO改性固...氧化石墨烯(Graphene Oxide,GO)可以改善水泥基材料力学性能的良好特性可用来改性固废(铁尾矿砂、再生粗骨料)混凝土。研究对再生粗骨料取代率、铁尾矿砂取代率和GO掺量3个因素设计了正交试验。引入考虑固废利用率的权重指标对GO改性固废混凝土的强度指标进行修正并得出加权评价指标,通过极差分析得到GO改性固废混凝土的较佳配合比,研究较佳配合比下GO改性固废混凝土的抗压强度与抗折强度、坍落度与吸水率和微观形貌。结果显示:当再生粗骨料取代率为100%、铁尾矿砂取代率为50%、GO质量分数为0.05%时,为GO改性固废混凝土的较佳配合比,对GO改性固废混凝土的评价指标影响显著性从大到小依次为再生粗骨料取代率、氧化石墨烯掺量、铁尾矿砂取代率。通过扫描电子显微镜(Scanning Electron Microscope,SEM)微观形貌分析发现,GO能优化水化产物堆叠形态,在尺度上细化水化产物,能够填充改性固废混凝土的孔隙结构,有效改善其致密度;较优配合比下的GO改性固废混凝土的力学性能优于普通混凝土的力学性能,验证了GO改性固废混凝土替代普通混凝土的可行性。展开更多
文摘To develop more efficient chemical methods for the demineralization of organic pollutants from water bodies, which one was also mimic to the nature, a degradation of methylene blue by Fe(Ⅲ) and H 2O 2 in the absence of light instead of Fe(Ⅱ) and H 2O 2 was studied. Results showed that use of Fe (Ⅲ) is more promising than Fe(Ⅱ). The present study reflects that Fenton reaction is more efficient, in the presence of a small amount of salicylic acid is added which is a one of the priority pollutant.
文摘The environmental conditions in steel industry were discussed in detail.It was also pointed out that it was necessary to reduce the quantity of waste generated and discharged by improving the raw material,energy structure and consumption rate,and reinforcing the waste control and management.At the same time,the relevant mathematical models of environmental impact were set up on the basis of raw material consumption,energy consumption and waste generation and discharge in different technical routes of steelmaking.The result showed that the production route of DR-iron clearly has more environmental advantages over that of BF-hot metal.
文摘Iron oxides and lead-zinc deposits in host rocks located in ten drainage basins in the coastal plain of the Red Sea,Egypt,have been subjected to important mining activities.The drainage basins were analyzed to estimate the transportations of these minerals. Fourteen soil samples and fifteen plant samples were collected from sites located in the basin and also in neighboring area and chemically analyzed.In
文摘以磷酸铁锂电池为研究对象,综合考虑梯次利用比例、使用周期及电池容量等因素,设定不同梯次利用场景,采用生命周期评价方法量化退役动力电池在梯次利用及后续报废处置阶段的环境影响,并对不同梯次利用率情景下的碳减排量进行分析.结果表明,与直接再生利用相比,储能、通信基站、低速电源三种梯次利用场景均表现为环境效益.其中,储能场景环境效益最大,其在气候变化、化石能源消耗、人体毒性-非致癌、陆地生态毒性指标等环境影响指标上均表现出相对优势.基于电池退役量和梯次利用去向,进一步计算出2023年全年磷酸铁锂电池梯次利用的碳减排量为1.05×10^(8) kg CO_(2)eq.当梯次利用率保持当前水平或以10%增长时,至2030年其全年碳减排量可达1.55×10^(9)kg CO_(2)eq.和5.98×10^(9)kg CO_(2)eq.,梯次利用具有良好的减污降碳环境表现.
文摘氧化石墨烯(Graphene Oxide,GO)可以改善水泥基材料力学性能的良好特性可用来改性固废(铁尾矿砂、再生粗骨料)混凝土。研究对再生粗骨料取代率、铁尾矿砂取代率和GO掺量3个因素设计了正交试验。引入考虑固废利用率的权重指标对GO改性固废混凝土的强度指标进行修正并得出加权评价指标,通过极差分析得到GO改性固废混凝土的较佳配合比,研究较佳配合比下GO改性固废混凝土的抗压强度与抗折强度、坍落度与吸水率和微观形貌。结果显示:当再生粗骨料取代率为100%、铁尾矿砂取代率为50%、GO质量分数为0.05%时,为GO改性固废混凝土的较佳配合比,对GO改性固废混凝土的评价指标影响显著性从大到小依次为再生粗骨料取代率、氧化石墨烯掺量、铁尾矿砂取代率。通过扫描电子显微镜(Scanning Electron Microscope,SEM)微观形貌分析发现,GO能优化水化产物堆叠形态,在尺度上细化水化产物,能够填充改性固废混凝土的孔隙结构,有效改善其致密度;较优配合比下的GO改性固废混凝土的力学性能优于普通混凝土的力学性能,验证了GO改性固废混凝土替代普通混凝土的可行性。
