River sand is essential for concrete but its production depletes 50 billion tons of resources annually causing scarcity and environmental issues. Desert sand (DS) covering 6 million square kilometers could help address this scarcity but has inferior properties. This study develops high-strength desert sand concrete (DSC) using 100 % DS through compression casting. Nine concrete mixes were prepared with varying DS replacement levels (0, 50, 100 %) and design strengths (30, 50, 70 MPa). Compression casting improved DSC's compressive and split tensile strength by up to 93 % and 54 % respectively compared to traditional concrete. It also reduced water absorption and voids by up to 41 % and 34 % and enhanced chloride and carbonation resistance by up to 64 % and 100 %. XRD, DSC-TG, and SEM analyses also confirm these results. Compression casting of DSC cut costs, CO2 emissions, and energy consumption by up to 57 %, 43 %, and 42 % respectively. This innovative DSC offers superior engineering, environmental, and economic benefits as a sustainable alternative to traditional concrete.
{"title":"Development of sustainable high-performance desert sand concrete: Engineering and environmental impacts of compression casting","authors":"Syed Minhaj Saleem Kazmi , Muhammad Junaid Munir , Yu-Fei Wu","doi":"10.1016/j.resconrec.2024.108002","DOIUrl":"10.1016/j.resconrec.2024.108002","url":null,"abstract":"<div><div>River sand is essential for concrete but its production depletes 50 billion tons of resources annually causing scarcity and environmental issues. Desert sand (DS) covering 6 million square kilometers could help address this scarcity but has inferior properties. This study develops high-strength desert sand concrete (DSC) using 100 % DS through compression casting. Nine concrete mixes were prepared with varying DS replacement levels (0, 50, 100 %) and design strengths (30, 50, 70 MPa). Compression casting improved DSC's compressive and split tensile strength by up to 93 % and 54 % respectively compared to traditional concrete. It also reduced water absorption and voids by up to 41 % and 34 % and enhanced chloride and carbonation resistance by up to 64 % and 100 %. XRD, DSC-TG, and SEM analyses also confirm these results. Compression casting of DSC cut costs, CO<sub>2</sub> emissions, and energy consumption by up to 57 %, 43 %, and 42 % respectively. This innovative DSC offers superior engineering, environmental, and economic benefits as a sustainable alternative to traditional concrete.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"212 ","pages":"Article 108002"},"PeriodicalIF":11.2,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1016/j.resconrec.2024.108007
Liang Shi , Honglin He , Li Zhang , Junbang Wang , Xiaoli Ren , Guirui Yu , Peng Hou , Jixi Gao , Bin Chen , Keyu Qin , Lili Feng , Shaoqiang Wang , Yan Lv , Mengyu Zhang , Zhongen Niu , Zhaosheng Wang , Mei Huang
China's terrestrial ecosystem carbon sink (TCS) is crucial for the global carbon budget. However, little is known how the enhanced human disturbances and increased extreme climate events may potentially destabilize TCS under warming climate. Using three process-based ecosystem models, we simulated the spatiotemporal variations of China's terrestrial net ecosystem productivity (NEP) from 2000 to 2020. We found that 26.7 % of the land area exhibit simultaneous increases in NEP temporal variability and autocorrelation during this period, indicating an increasing risk of TCS destabilization. Particularly, the southeastern subtropical monsoon region in China emerged as a hot-spot of potentially increasing NEP instability, despite its high carbon sink capacity, both NEP temporal variability and autocorrelation in this area exhibit a notable upward trend. Climate change, notably increasing precipitation and its temporal variation, appeared to be the primary driver of this instability. This harbinger implies that a regime shift in carbon sink capacity may occur as the warming climate continues to push it to the verge of stability.
{"title":"Stability of China's terrestrial ecosystems carbon sink during 2000-2020","authors":"Liang Shi , Honglin He , Li Zhang , Junbang Wang , Xiaoli Ren , Guirui Yu , Peng Hou , Jixi Gao , Bin Chen , Keyu Qin , Lili Feng , Shaoqiang Wang , Yan Lv , Mengyu Zhang , Zhongen Niu , Zhaosheng Wang , Mei Huang","doi":"10.1016/j.resconrec.2024.108007","DOIUrl":"10.1016/j.resconrec.2024.108007","url":null,"abstract":"<div><div>China's terrestrial ecosystem carbon sink (TCS) is crucial for the global carbon budget. However, little is known how the enhanced human disturbances and increased extreme climate events may potentially destabilize TCS under warming climate. Using three process-based ecosystem models, we simulated the spatiotemporal variations of China's terrestrial net ecosystem productivity (NEP) from 2000 to 2020. We found that 26.7 % of the land area exhibit simultaneous increases in NEP temporal variability and autocorrelation during this period, indicating an increasing risk of TCS destabilization. Particularly, the southeastern subtropical monsoon region in China emerged as a hot-spot of potentially increasing NEP instability, despite its high carbon sink capacity, both NEP temporal variability and autocorrelation in this area exhibit a notable upward trend. Climate change, notably increasing precipitation and its temporal variation, appeared to be the primary driver of this instability. This harbinger implies that a regime shift in carbon sink capacity may occur as the warming climate continues to push it to the verge of stability.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"212 ","pages":"Article 108007"},"PeriodicalIF":11.2,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1016/j.resconrec.2024.108009
Maarten Koese , Michael Parzer , Benjamin Sprecher , René Kleijn
Widespread adoption of electric vehicles poses challenges due to critical raw material (CRM) requirements. The European Union (EU) is now dependent on other countries for supply of these materials, but wants to increase self-sufficiency for primary extraction to 10 % in 2030. Here we map and quantify Europe's raw material reserves and resources, revealing promising deposits for most minerals. Our analysis indicates that, assuming a high development scenario, for lithium, nickel and copper the planned extraction in Europe is sufficient to meet at least 10 % ofdemand for E-mobility in 2030, as the EU's proposed target dictates. The projected extraction of cobalt, natural graphite and REE, will probably not reach 10 % of the demand in 2030. For REE there is no European production projected. To meet these targets and increase the EU's self-sufficiency, CRM extraction in Europe needs to increase, in parallel with implementing circular economy efforts to reduce material demand.
{"title":"Self-sufficiency of the European Union in critical raw materials for E-mobility","authors":"Maarten Koese , Michael Parzer , Benjamin Sprecher , René Kleijn","doi":"10.1016/j.resconrec.2024.108009","DOIUrl":"10.1016/j.resconrec.2024.108009","url":null,"abstract":"<div><div>Widespread adoption of electric vehicles poses challenges due to critical raw material (CRM) requirements. The European Union (EU) is now dependent on other countries for supply of these materials, but wants to increase self-sufficiency for primary extraction to 10 % in 2030. Here we map and quantify Europe's raw material reserves and resources, revealing promising deposits for most minerals. Our analysis indicates that, assuming a high development scenario, for lithium, nickel and copper the planned extraction in Europe is sufficient to meet at least 10 % ofdemand for E-mobility in 2030, as the EU's proposed target dictates. The projected extraction of cobalt, natural graphite and REE, will probably not reach 10 % of the demand in 2030. For REE there is no European production projected. To meet these targets and increase the EU's self-sufficiency, CRM extraction in Europe needs to increase, in parallel with implementing circular economy efforts to reduce material demand.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"212 ","pages":"Article 108009"},"PeriodicalIF":11.2,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-11DOI: 10.1016/j.resconrec.2024.107989
Lan Luo , Xintong Wu , Jie Hu , Xinyi Dong , Haikun Wang
With the rapid development of e-commerce, the environmental impacts and economic costs of intracity express delivery, along with reduction pathways, however, remain largely unexplored. Therefore, we compiled carbon emission inventories of express delivery at the intracity scale covering the entire process from warehouse to consumers. Additionally, five pathways were designed and compared to explore the feasible measures for coordinated carbon reduction and cost-effective efficiency improvements, incorporating new technologies such as electric vehicles and autonomous driving. The results show that carbon emissions from intracity express delivery in China surged from 97 kt in 2013 to 1143 kt in 2021. A series of measures could reduce carbon emissions by 64.86 % (741.287 kt) through the electrification of gasoline vehicles, although the vehicle cost of electric vehicles would triple. If unmanned electric vehicles are used for the last mile of express delivery, the economic costs could decrease significantly by 77.77 % (US$36.693 billion), reducing the cost per express from US$0.436 down to US$0.097. Our study could provide a theoretical basis for the sustainable development and costs reduction of China's express delivery industry.
{"title":"Assessing the environmental and economic impacts of intracity express delivery: Pathways for carbon reduction and cost efficiency in China","authors":"Lan Luo , Xintong Wu , Jie Hu , Xinyi Dong , Haikun Wang","doi":"10.1016/j.resconrec.2024.107989","DOIUrl":"10.1016/j.resconrec.2024.107989","url":null,"abstract":"<div><div>With the rapid development of e-commerce, the environmental impacts and economic costs of intracity express delivery, along with reduction pathways, however, remain largely unexplored. Therefore, we compiled carbon emission inventories of express delivery at the intracity scale covering the entire process from warehouse to consumers. Additionally, five pathways were designed and compared to explore the feasible measures for coordinated carbon reduction and cost-effective efficiency improvements, incorporating new technologies such as electric vehicles and autonomous driving. The results show that carbon emissions from intracity express delivery in China surged from 97 kt in 2013 to 1143 kt in 2021. A series of measures could reduce carbon emissions by 64.86 % (741.287 kt) through the electrification of gasoline vehicles, although the vehicle cost of electric vehicles would triple. If unmanned electric vehicles are used for the last mile of express delivery, the economic costs could decrease significantly by 77.77 % (US$36.693 billion), reducing the cost per express from US$0.436 down to US$0.097. Our study could provide a theoretical basis for the sustainable development and costs reduction of China's express delivery industry.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"212 ","pages":"Article 107989"},"PeriodicalIF":11.2,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-09DOI: 10.1016/j.resconrec.2024.107999
Lan-Ping Qian , Ling-Yu Xu , Bo-Tao Huang , Yi Li , Jirong Lan , Fuyuan Gong , Hong Guan
In modern civil engineering, advanced concrete materials are expected to not only possess excellent mechanical and durability properties but also exhibit additional functions. Waste-derived artificial aggregate (AA) is an innovative designable aggregate type with high sustainability and value-added properties. This study provided a comprehensive literature review on the functionalization of designable AA for the first time. The intrinsic characteristics of AA that are potential for realizing its functionalization were first introduced, where the AA's porous structure and chemical reactivity were ideal for internal curing, self-healing, purification, or foamed concrete application. Then, the functionalities of AA through encapsulating modification materials were discussed, where encapsulating AA with polymers or bacteria could enhance self-healing, combining AA with phase change materials allowed for energy efficiency, and adding additives like carbon fiber or magnetite could offer AA with conductivity and electromagnetic shielding characteristics. Additionally, the structural designs of AA for improved functions were summarized, where core-shell and hollow designs in AA could improve heavy metal immobilization and create cavities for specialized applications. Finally, the future perspectives of the AA functionalization technology were proposed. The contributions of this review could provide helpful guidelines for the future development, promotion, and practical applications of sustainable AA with additional functions.
在现代土木工程中，人们希望先进的混凝土材料不仅具有出色的机械和耐久性能，而且还能发挥更多功能。废弃物衍生的人工骨料（AA）是一种创新的可设计骨料类型，具有高度的可持续性和增值特性。本研究首次对可设计 AA 的功能化进行了全面的文献综述。首先介绍了 AA 有可能实现其功能化的内在特性，其中 AA 的多孔结构和化学反应活性是内部固化、自愈、净化或发泡混凝土应用的理想选择。然后，讨论了 AA 通过封装改性材料实现功能化的问题，其中用聚合物或细菌封装 AA 可增强自愈合能力，将 AA 与相变材料结合可提高能源效率，添加碳纤维或磁铁矿等添加剂可使 AA 具有导电性和电磁屏蔽特性。此外，还总结了可改善功能的 AA 结构设计，其中 AA 中的核壳和空心设计可提高重金属固定性，并为特殊应用创造空腔。最后，提出了 AA 功能化技术的未来展望。本综述可为具有附加功能的可持续 AA 的未来开发、推广和实际应用提供有益的指导。
{"title":"Functionalization of waste-derived artificial aggregates: A state-of-the-art review","authors":"Lan-Ping Qian , Ling-Yu Xu , Bo-Tao Huang , Yi Li , Jirong Lan , Fuyuan Gong , Hong Guan","doi":"10.1016/j.resconrec.2024.107999","DOIUrl":"10.1016/j.resconrec.2024.107999","url":null,"abstract":"<div><div>In modern civil engineering, advanced concrete materials are expected to not only possess excellent mechanical and durability properties but also exhibit additional functions. Waste-derived artificial aggregate (AA) is an innovative designable aggregate type with high sustainability and value-added properties. This study provided a comprehensive literature review on the functionalization of designable AA for the first time. The intrinsic characteristics of AA that are potential for realizing its functionalization were first introduced, where the AA's porous structure and chemical reactivity were ideal for internal curing, self-healing, purification, or foamed concrete application. Then, the functionalities of AA through encapsulating modification materials were discussed, where encapsulating AA with polymers or bacteria could enhance self-healing, combining AA with phase change materials allowed for energy efficiency, and adding additives like carbon fiber or magnetite could offer AA with conductivity and electromagnetic shielding characteristics. Additionally, the structural designs of AA for improved functions were summarized, where core-shell and hollow designs in AA could improve heavy metal immobilization and create cavities for specialized applications. Finally, the future perspectives of the AA functionalization technology were proposed. The contributions of this review could provide helpful guidelines for the future development, promotion, and practical applications of sustainable AA with additional functions.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"212 ","pages":"Article 107999"},"PeriodicalIF":11.2,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-09DOI: 10.1016/j.resconrec.2024.108006
Yuexin Liu , Yang Gao , Jianxun Gai , Haowei Liu , Zhonghao Zhang , Vasco Diogo , Anna M. Hersperger
Water, land, and food constitute essential components of agricultural supply chains, yet their interconnections remain unclear. Here we used the multi-regional input-output, in conjunction with the nexus index, to analyze the impact of agricultural trade on water and land efficiency. An average of 38.07 % of land use and 28.27 % of water consumption embedded in agricultural commodities was used for interregional trade from 1995 to 2015. Overall, the trading flows transferring from resource-rich and underdeveloped economies to resource-poor and developed economies enhanced the resource efficiency on a global scale, with average land and water efficiency rising by 68.23 % and 56.11 %, respectively. But the growth intensity of commodities’ exports has limited the improvement of resource efficiency in exporting countries, particularly in net middle-income exporters such as Brazil, India, and Indonesia. The pressure of land and water transfers varies across commodities. Crop-based products account for 72.39 % of water resource flow, while meat-based products account for 67.61 % of land resource flow. Among these, vegetable, fruit, and nut, which have the highest water-land-food nexus, is playing an increasingly significant role in the global pattern of resource transfer. The study proposed targeted measures for sustainable agricultural management through efficiency calculation in Water-Land-Food nexus.
{"title":"The Water-Land-Food nexus reveals growing resource export pressure in middle-income economies","authors":"Yuexin Liu , Yang Gao , Jianxun Gai , Haowei Liu , Zhonghao Zhang , Vasco Diogo , Anna M. Hersperger","doi":"10.1016/j.resconrec.2024.108006","DOIUrl":"10.1016/j.resconrec.2024.108006","url":null,"abstract":"<div><div>Water, land, and food constitute essential components of agricultural supply chains, yet their interconnections remain unclear. Here we used the multi-regional input-output, in conjunction with the nexus index, to analyze the impact of agricultural trade on water and land efficiency. An average of 38.07 % of land use and 28.27 % of water consumption embedded in agricultural commodities was used for interregional trade from 1995 to 2015. Overall, the trading flows transferring from resource-rich and underdeveloped economies to resource-poor and developed economies enhanced the resource efficiency on a global scale, with average land and water efficiency rising by 68.23 % and 56.11 %, respectively. But the growth intensity of commodities’ exports has limited the improvement of resource efficiency in exporting countries, particularly in net middle-income exporters such as Brazil, India, and Indonesia. The pressure of land and water transfers varies across commodities. Crop-based products account for 72.39 % of water resource flow, while meat-based products account for 67.61 % of land resource flow. Among these, vegetable, fruit, and nut, which have the highest water-land-food nexus, is playing an increasingly significant role in the global pattern of resource transfer. The study proposed targeted measures for sustainable agricultural management through efficiency calculation in Water-Land-Food nexus.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"212 ","pages":"Article 108006"},"PeriodicalIF":11.2,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-09DOI: 10.1016/j.resconrec.2024.108005
Lingrong Zeng , Ziwei Yao , Dewei Li , Qingying Xiao , Ziwen Chang , Jingjing Fan , Shuigen Li , Mengling Li , Ling Ding , Penghui Shao , Xubiao Luo , Shenglian Luo
Against the backdrop of rapid development in new energy, cobalt recovery is becoming increasingly crucial. The recovery of cobalt is significantly restricted due to its always coexistence with nickel, making the exploration of high-capacity adsorbents for selectively separating cobalt both challenging and significant. Here, we designed and synthesized magnesium sodium hydrogen phosphate (MgNa3H(PO4)2, MgNaP) to achieve the first-ever recovery of Co(II) from complex waters. The batch experiments demonstrated that MgNaP exhibited record-breaking selectivity performance, with a selective separation coefficient for cobalt over nickel reaching 18.49. Meanwhile, MgNaP showed a record-high adsorption capacity (511.32 mg⋅g-1) through cation exchange with sodium and cobalt. The outstanding adsorption properties of MgNaP were confirmed through advanced characterization and calculation tools, with these attributes being attributed to the synergistic effect of ion exchange and the complexation of cobalt with phosphate groups. This work provides a novel technique for the deep separation of Ni-Co ion mixed systems.
{"title":"Selective anchoring of phosphate groups coupled with swift interlayer cation exchange for record-high capacity cobalt adsorption","authors":"Lingrong Zeng , Ziwei Yao , Dewei Li , Qingying Xiao , Ziwen Chang , Jingjing Fan , Shuigen Li , Mengling Li , Ling Ding , Penghui Shao , Xubiao Luo , Shenglian Luo","doi":"10.1016/j.resconrec.2024.108005","DOIUrl":"10.1016/j.resconrec.2024.108005","url":null,"abstract":"<div><div>Against the backdrop of rapid development in new energy, cobalt recovery is becoming increasingly crucial. The recovery of cobalt is significantly restricted due to its always coexistence with nickel, making the exploration of high-capacity adsorbents for selectively separating cobalt both challenging and significant. Here, we designed and synthesized magnesium sodium hydrogen phosphate (MgNa<sub>3</sub>H(PO<sub>4</sub>)<sub>2</sub>, MgNaP) to achieve the first-ever recovery of Co(II) from complex waters. The batch experiments demonstrated that MgNaP exhibited record-breaking selectivity performance, with a selective separation coefficient for cobalt over nickel reaching 18.49. Meanwhile, MgNaP showed a record-high adsorption capacity (511.32 mg⋅g<sup>-1</sup>) through cation exchange with sodium and cobalt. The outstanding adsorption properties of MgNaP were confirmed through advanced characterization and calculation tools, with these attributes being attributed to the synergistic effect of ion exchange and the complexation of cobalt with phosphate groups. This work provides a novel technique for the deep separation of Ni-Co ion mixed systems.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"212 ","pages":"Article 108005"},"PeriodicalIF":11.2,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-07DOI: 10.1016/j.resconrec.2024.107994
Ben Moins , David Hernando , Dieter Seghers , Wim Van den bergh , Amaryllis Audenaert
The objective of this study was to calculate cradle-to-gate benchmarks for the embodied greenhouse gas (GHG) emissions of asphalt mixtures. Reference (median), target (10th percentile), and limit (80th percentile) benchmarks were calculated for nine mixture types using 606 mixtures. The following ranges for the specific benchmarks in terms of CO2-eq per ton were obtained: 41.2 to 66.7 (references), 31.2 to 52.9 (targets), and 44.8 to 75.3 (limits). It was found that the yearly embodied emissions could be reduced by 23.7 % by aiming for the targets, which is just below the 25 % reduction goal set in Belgium. However, these savings could be further increased to 29.3 % considering consistent implementation of the most used best available technologies. Moreover, if the lowest 10th percentile of this scenario was targeted, an ambitious reduction potential of 39.2 % was obtained. Consequently, a combination of more extreme mitigation strategies is required to achieve carbon neutrality.
{"title":"Establishing greenhouse gas emission benchmarks for the asphalt industry – Are short-term reduction targets feasible using current practice or are more extensive measures needed?","authors":"Ben Moins , David Hernando , Dieter Seghers , Wim Van den bergh , Amaryllis Audenaert","doi":"10.1016/j.resconrec.2024.107994","DOIUrl":"10.1016/j.resconrec.2024.107994","url":null,"abstract":"<div><div>The objective of this study was to calculate cradle-to-gate benchmarks for the embodied greenhouse gas (GHG) emissions of asphalt mixtures. Reference (median), target (10<sup>th</sup> percentile), and limit (80<sup>th</sup> percentile) benchmarks were calculated for nine mixture types using 606 mixtures. The following ranges for the specific benchmarks in terms of CO<sub>2</sub>-eq per ton were obtained: 41.2 to 66.7 (references), 31.2 to 52.9 (targets), and 44.8 to 75.3 (limits). It was found that the yearly embodied emissions could be reduced by 23.7 % by aiming for the targets, which is just below the 25 % reduction goal set in Belgium. However, these savings could be further increased to 29.3 % considering consistent implementation of the most used best available technologies. Moreover, if the lowest 10<sup>th</sup> percentile of this scenario was targeted, an ambitious reduction potential of 39.2 % was obtained. Consequently, a combination of more extreme mitigation strategies is required to achieve carbon neutrality.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"212 ","pages":"Article 107994"},"PeriodicalIF":11.2,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-07DOI: 10.1016/j.resconrec.2024.108004
Xiaoran Wu , Na Zhao , Yuwei Wang , Yanlei Ye , Wei Wang , Tianxiang Yue , Liqiang Zhang , Yansui Liu
The widespread abandonment of croplands poses a severe threat to China's food security. However, the existing knowledge regarding the potential for recultivating abandoned croplands is limited. Previous studies have generally overestimated this potential due to inadequate assessments of their suitability for recultivation. In the present study, an optimized machine learning approach was introduced to assess, for the first time, the suitability of abandoned croplands for recultivation in China. In 2022, the total abandoned croplands in China covered 31.2 million hectares, of which 82.54 % was deemed suitable for recultivation. Recultivating abandoned croplands in China could substantially enhance food security, potentially yielding around 162 million tons annually. Moreover, crop switching can further increase the yield rate by up to 24.95 % or energy supply by up to 43.14 %. The present study offers valuable insights to policymakers in determining cropping strategies, establishing strategic grain reserves, and managing international food trade.
{"title":"The potential role of abandoned cropland for food security in China","authors":"Xiaoran Wu , Na Zhao , Yuwei Wang , Yanlei Ye , Wei Wang , Tianxiang Yue , Liqiang Zhang , Yansui Liu","doi":"10.1016/j.resconrec.2024.108004","DOIUrl":"10.1016/j.resconrec.2024.108004","url":null,"abstract":"<div><div>The widespread abandonment of croplands poses a severe threat to China's food security. However, the existing knowledge regarding the potential for recultivating abandoned croplands is limited. Previous studies have generally overestimated this potential due to inadequate assessments of their suitability for recultivation. In the present study, an optimized machine learning approach was introduced to assess, for the first time, the suitability of abandoned croplands for recultivation in China. In 2022, the total abandoned croplands in China covered 31.2 million hectares, of which 82.54 % was deemed suitable for recultivation. Recultivating abandoned croplands in China could substantially enhance food security, potentially yielding around 162 million tons annually. Moreover, crop switching can further increase the yield rate by up to 24.95 % or energy supply by up to 43.14 %. The present study offers valuable insights to policymakers in determining cropping strategies, establishing strategic grain reserves, and managing international food trade.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"212 ","pages":"Article 108004"},"PeriodicalIF":11.2,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1016/j.resconrec.2023.107143
A. P. Gursel, Arman Shehabi, A. Horvath
{"title":"What are the energy and greenhouse gas benefits of repurposing non-residential buildings into apartments?","authors":"A. P. Gursel, Arman Shehabi, A. Horvath","doi":"10.1016/j.resconrec.2023.107143","DOIUrl":"https://doi.org/10.1016/j.resconrec.2023.107143","url":null,"abstract":"","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"1 1","pages":""},"PeriodicalIF":13.2,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"55260846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号