High temperatures and providing sufficient time for the thermal desorption of persistent organic pollutants(POPs)from contaminated clay soils can lead to intensive energy consumption.Therefore,this article provides a ...High temperatures and providing sufficient time for the thermal desorption of persistent organic pollutants(POPs)from contaminated clay soils can lead to intensive energy consumption.Therefore,this article provides a critical review of the potential additives which can improve soil texture and increase the volatility of POPs,and then discusses their enhanced mechanisms for contributing to a green economy.Ca-based additives have been used to reduce plasticity of bentonite clay,absorb water and replenish system heat.In contrast,non-Ca-based additives have been used to decrease the plasticity of kaolin clay.The soil structure and soil plasticity can be changed through cation exchange and flocculation processes.The transitionmetal oxides and alkalimetal oxides can be applied to catalyze and oxidize polycyclic aromatic hydrocarbons,petroleum and emerging contaminants.In this system,reactive oxygen species(•O_(2)^(-)and•OH)are generated fromthermal excitation without strong chemical oxidants.Moreover,multiple active ingredients in recycled solid wastes can be controlled to reduce soil plasticity and enhance thermal catalysis.Alternatively,the alkali,nano zero-valent iron and nano-TiN can catalyze hydrodechlorination of POPs under reductive conditions.Especially,photo and photo-thermal catalysis are discussed to accelerate replacement of fossil fuels by renewable energy in thermal remediation.展开更多
With the wide application of non-linear loads and the large-scale access of distributed energy generations based on power electronics equipments, power quality problems in the distribution network are increasingly ser...With the wide application of non-linear loads and the large-scale access of distributed energy generations based on power electronics equipments, power quality problems in the distribution network are increasingly serious with new characteristics. Further in-depth research is of great significance in theory and practice. This paper provides an overview of power quality analysis, compensators, and control technologies under the new situation of smart grid. It focuses on the topologies and control methods for power quality conditioners, especially new characteristics of power quality and applicable control technologies in microgrids and distributed power plants.Finally, trends and prospects of power quality control technology are introduced, which is important to achieve security and efficient operation of smart grid.展开更多
基金supported by the National Key R&D Program of China(No.2018YFC1802101)the National Natural Science Foundation of China(No.52170149).
文摘High temperatures and providing sufficient time for the thermal desorption of persistent organic pollutants(POPs)from contaminated clay soils can lead to intensive energy consumption.Therefore,this article provides a critical review of the potential additives which can improve soil texture and increase the volatility of POPs,and then discusses their enhanced mechanisms for contributing to a green economy.Ca-based additives have been used to reduce plasticity of bentonite clay,absorb water and replenish system heat.In contrast,non-Ca-based additives have been used to decrease the plasticity of kaolin clay.The soil structure and soil plasticity can be changed through cation exchange and flocculation processes.The transitionmetal oxides and alkalimetal oxides can be applied to catalyze and oxidize polycyclic aromatic hydrocarbons,petroleum and emerging contaminants.In this system,reactive oxygen species(•O_(2)^(-)and•OH)are generated fromthermal excitation without strong chemical oxidants.Moreover,multiple active ingredients in recycled solid wastes can be controlled to reduce soil plasticity and enhance thermal catalysis.Alternatively,the alkali,nano zero-valent iron and nano-TiN can catalyze hydrodechlorination of POPs under reductive conditions.Especially,photo and photo-thermal catalysis are discussed to accelerate replacement of fossil fuels by renewable energy in thermal remediation.
基金supported by the General Program of National Natural Science Foundation of China(No.51477045)
文摘With the wide application of non-linear loads and the large-scale access of distributed energy generations based on power electronics equipments, power quality problems in the distribution network are increasingly serious with new characteristics. Further in-depth research is of great significance in theory and practice. This paper provides an overview of power quality analysis, compensators, and control technologies under the new situation of smart grid. It focuses on the topologies and control methods for power quality conditioners, especially new characteristics of power quality and applicable control technologies in microgrids and distributed power plants.Finally, trends and prospects of power quality control technology are introduced, which is important to achieve security and efficient operation of smart grid.
