Integrated landscaping technology of reclaiming condensed water from the thermal channel of double-pane glass curtain wall and applying the reclaimed water in micro irrigation of natural plants was explored.Selection ...Integrated landscaping technology of reclaiming condensed water from the thermal channel of double-pane glass curtain wall and applying the reclaimed water in micro irrigation of natural plants was explored.Selection of plant species for the internal space of glass curtain wall and vertical greening outside was studied to meet the ecological technological requirements of glass curtain wall.Progressive experiment of new technology and simulated calculation of indexes were applied to obtain solar radiation consumption,meet the ecological characters of plants in glass curtain walls,and finally improve indoor and outdoor thermal environment.The results showed that new ecological technologies of applying plants on glass curtain walls help realize ecological utilization of glass curtain walls,further reduce energy consumption of buildings,achieve and even surpass the standards of national 3-star green buildings.展开更多
Urban surface water pollution poses significant threats to aquatic ecosystems and human health.Conventional nitrogen removal technologies used in urban surface water exhibit drawbacks such as high consumption of carbo...Urban surface water pollution poses significant threats to aquatic ecosystems and human health.Conventional nitrogen removal technologies used in urban surface water exhibit drawbacks such as high consumption of carbon sources,high sludge production,and focus on dissolved oxygen(DO)concentration while neglecting the impact of DO gradients.Here,we show an ecological filter walls(EFW)that removes pollutants from urban surface water.We utilized a polymer-based three-dimensional matrix to enhance water permeability,and emergent plants were integrated into the EFW to facilitate biofilm formation.We observed that varying aeration intensities within the EFW's aerobic zone resulted in distinct DO gradients,with an optimal DO control at 3.19±0.2 mg L^(-1) achieving superior nitrogen removal efficiencies.Specifically,the removal efficiencies of total organic carbon,total nitrogen,ammonia,and nitrate were 79.4%,81.3%,99.6%,and 79.1%,respectively.Microbial community analysis under a 3 mg L^(-1) DO condition revealed a shift in microbial composition and abundance,with genera such as Dechloromonas,Acinetobacter,unclassified_f__Comamonadaceae,SM1A02 and Pseudomonas playing pivotal roles in carbon and nitrogen elimination.Notably,the EFW facilitated shortcut nitrification-denitrification processes,predominantly contributing to nitrogen removal.Considering low manufacturing cost,flexible application,small artificial trace,and good pollutant removal ability,EFW has promising potential as an innovative approach to urban surface water treatment.展开更多
Long-term monitoring of the ecological environment changes is helpful for the protection of the ecological environment.Based on the ecological environment of the Sahel region in Africa,we established a remote sensing ...Long-term monitoring of the ecological environment changes is helpful for the protection of the ecological environment.Based on the ecological environment of the Sahel region in Africa,we established a remote sensing ecological index(RSEI)model for this region by combining dryness,moisture,greenness,and desertification indicators.Using the Moderate-resolution Imaging Spectroradiometer(MODIS)data in Google Earth Engine(GEE)platform,this study analyzed the ecological environment quality of the Sahel region during the period of 2001-2020.We used liner regression and fluctuation analysis methods to study the trend and fluctuation of RSEI,and utilized the stepwise regression approach to analyze the contribution of each indicator to the RSEI.Further,the correlation analysis was used to analyze the correlation between RSEI and precipitation,and Hurst index was applied to evaluate the change trend of RSEI in the future.The results show that RSEI of the Sahel region exhibited spatial heterogeneity.Specifically,it exhibited a decrease in gradient from south to north of the Sahel region.Moreover,RSEI in parts of the Sahel region presented non-zonal features.Different land-cover types demonstrated different RSEI values and changing trends.We found that RSEI and precipitation were positively correlated,suggesting that precipitation is the controlling factor of RSEI.The areas where RSEI values presented an increasing trend were slightly less than the areas where RSEI values presented a decreasing trend.In the Sahel region,the areas with the ecological environment characterized by continuous deterioration and continuous improvement accounted for 44.02%and 28.29%of the total study area,respectively,and the areas in which the ecological environment was changing from improvement to deterioration and from deterioration to improvement accounted for 12.42%and 15.26%of the whole area,respectively.In the face of the current ecological environment and future change trends of RSEI in the Sahel region,the research results provide a reference for the construction of the"Green Great Wall"(GGW)ecological environment project in Africa.展开更多
According to a United Nations forecast seventy percent of the world population will be living in cities by 2050(UNFPA 2007).Such a major shift away from rural and naturally vegetated areas to the polluted,noisy,and cr...According to a United Nations forecast seventy percent of the world population will be living in cities by 2050(UNFPA 2007).Such a major shift away from rural and naturally vegetated areas to the polluted,noisy,and crowded concrete jungle of modern cities is and will continue to be profound.We must fi nd new and innovative ways to better integrate nature into our ever expanding cities.Green roofs and parks are one way to do this but there are substantial amounts of vertical space that for the most part have been underutilized.Green walls not only bring nature back into city life,they do so in a way that is accessible to everyone.Currently green walls are at the cutting edge of interior and architectural design trends but they are also being integrated into sustainable building design for their numerous environmental benefi ts.This article aims to clarify what green walls are,going into detail about the various technologies available;the pros and cons of each;and the ecological,social,and economic benefi ts of these living works of art.展开更多
基金Supported by Foundation Program of Suzhou Low-carbon Economy and Technology Research Center:Innovation and Design of Low Carbon Emission for Suzhou Green Urban Architectural Complex(Q313801010)
文摘Integrated landscaping technology of reclaiming condensed water from the thermal channel of double-pane glass curtain wall and applying the reclaimed water in micro irrigation of natural plants was explored.Selection of plant species for the internal space of glass curtain wall and vertical greening outside was studied to meet the ecological technological requirements of glass curtain wall.Progressive experiment of new technology and simulated calculation of indexes were applied to obtain solar radiation consumption,meet the ecological characters of plants in glass curtain walls,and finally improve indoor and outdoor thermal environment.The results showed that new ecological technologies of applying plants on glass curtain walls help realize ecological utilization of glass curtain walls,further reduce energy consumption of buildings,achieve and even surpass the standards of national 3-star green buildings.
基金supported by the National Natural Science Foundation of China(Grant No.21972036 and 21673061)the State Key Laboratory of Urban Water Resource and Environment(Harbin Institute of Technology)(No.2022TS07 and ES202210)+1 种基金support from the National Key Research and Development Program of China(Grant No.2017YFA0207204)support of the Innovation Team in Key Areas of the Ministry of Science and Technology(AUGA2160200918)and the Heilongjiang Touyan Team.
文摘Urban surface water pollution poses significant threats to aquatic ecosystems and human health.Conventional nitrogen removal technologies used in urban surface water exhibit drawbacks such as high consumption of carbon sources,high sludge production,and focus on dissolved oxygen(DO)concentration while neglecting the impact of DO gradients.Here,we show an ecological filter walls(EFW)that removes pollutants from urban surface water.We utilized a polymer-based three-dimensional matrix to enhance water permeability,and emergent plants were integrated into the EFW to facilitate biofilm formation.We observed that varying aeration intensities within the EFW's aerobic zone resulted in distinct DO gradients,with an optimal DO control at 3.19±0.2 mg L^(-1) achieving superior nitrogen removal efficiencies.Specifically,the removal efficiencies of total organic carbon,total nitrogen,ammonia,and nitrate were 79.4%,81.3%,99.6%,and 79.1%,respectively.Microbial community analysis under a 3 mg L^(-1) DO condition revealed a shift in microbial composition and abundance,with genera such as Dechloromonas,Acinetobacter,unclassified_f__Comamonadaceae,SM1A02 and Pseudomonas playing pivotal roles in carbon and nitrogen elimination.Notably,the EFW facilitated shortcut nitrification-denitrification processes,predominantly contributing to nitrogen removal.Considering low manufacturing cost,flexible application,small artificial trace,and good pollutant removal ability,EFW has promising potential as an innovative approach to urban surface water treatment.
基金This research was financially supported by the West Light Foundation of the Chinese Academy of Science(2017-XBQNXZ-B-018)the National Natural Science Foundation of China(41861144020)the National Key Research and Development Program of China-Joint Research on Technology to Combat Desertification for African Countries of the“Great Green Wall”(2018YFE0106000).
文摘Long-term monitoring of the ecological environment changes is helpful for the protection of the ecological environment.Based on the ecological environment of the Sahel region in Africa,we established a remote sensing ecological index(RSEI)model for this region by combining dryness,moisture,greenness,and desertification indicators.Using the Moderate-resolution Imaging Spectroradiometer(MODIS)data in Google Earth Engine(GEE)platform,this study analyzed the ecological environment quality of the Sahel region during the period of 2001-2020.We used liner regression and fluctuation analysis methods to study the trend and fluctuation of RSEI,and utilized the stepwise regression approach to analyze the contribution of each indicator to the RSEI.Further,the correlation analysis was used to analyze the correlation between RSEI and precipitation,and Hurst index was applied to evaluate the change trend of RSEI in the future.The results show that RSEI of the Sahel region exhibited spatial heterogeneity.Specifically,it exhibited a decrease in gradient from south to north of the Sahel region.Moreover,RSEI in parts of the Sahel region presented non-zonal features.Different land-cover types demonstrated different RSEI values and changing trends.We found that RSEI and precipitation were positively correlated,suggesting that precipitation is the controlling factor of RSEI.The areas where RSEI values presented an increasing trend were slightly less than the areas where RSEI values presented a decreasing trend.In the Sahel region,the areas with the ecological environment characterized by continuous deterioration and continuous improvement accounted for 44.02%and 28.29%of the total study area,respectively,and the areas in which the ecological environment was changing from improvement to deterioration and from deterioration to improvement accounted for 12.42%and 15.26%of the whole area,respectively.In the face of the current ecological environment and future change trends of RSEI in the Sahel region,the research results provide a reference for the construction of the"Green Great Wall"(GGW)ecological environment project in Africa.
文摘According to a United Nations forecast seventy percent of the world population will be living in cities by 2050(UNFPA 2007).Such a major shift away from rural and naturally vegetated areas to the polluted,noisy,and crowded concrete jungle of modern cities is and will continue to be profound.We must fi nd new and innovative ways to better integrate nature into our ever expanding cities.Green roofs and parks are one way to do this but there are substantial amounts of vertical space that for the most part have been underutilized.Green walls not only bring nature back into city life,they do so in a way that is accessible to everyone.Currently green walls are at the cutting edge of interior and architectural design trends but they are also being integrated into sustainable building design for their numerous environmental benefi ts.This article aims to clarify what green walls are,going into detail about the various technologies available;the pros and cons of each;and the ecological,social,and economic benefi ts of these living works of art.
