Sequestration of CO_(2)by concrete and natural minerals-current status,future potential,and additional benefits  

作　　者：Douglas A.Schaefer Heng Gui Jianchu Xu 

机构地区：[1]Centre for Mountain Futures(CMF),Kunming Institute of Botany,Chinese Academy of Science,Kunming 650201,Yunnan,China [2]Department of Economic Plants and Biotechnology,Yunnan Key Laboratory for Wild Plant Resources,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201,Yunnan,China [3]CAS Key Laboratory for Plant Biodiversity and Biogeography of East Asia(KLPB),Kunming Institute of Botany,Chinese Academy of Science,Kunming 650201,Yunnan,China

出　　处：《Circular Agricultural Systems》2024年第1期67-75,共9页循环农业系统（英文）

基　　金：supported by the National Natural Science Foundation of China(NSFC Grant No.32001296);the Youth Innovation Promotion Association of CAS,China(Grant No.2022396),and Chinese Academy of Sciences President's International Fellowship Initiative.

摘　　要：Concrete structures are some of the largest constructions in human civilization.Their manufacture releases CO_(2)into atmosphere,which is partially readsorbed by standing structures,and further release occurs when they are demolished.Concrete is chemically similar to basaltic minerals,both adsorb CO_(2)where they are exposed on the earth's surface.Sequestration of CO_(2)is beneficial to reduce atmospheric concentrations,and thus limit future temperature increases.Therefore,multiple options are being examined for CO_(2)sequestration.For the first time,we compare the CO_(2)sequestration capacity of these two materials.We review previous work quantifying CO_(2)sequestration capacity of both materials and for the first time,compare their potential quantitative roles.Costs of that are compiled,to the extent they have been examined.Costly grinding of these materials to small particle sizes accelerates CO_(2)sequestration,and mycorrhizae in agricultural soils might reduce the associated costs.Both these materials can improve nutrient status in agricultural soils,and limit acidification from external nitrogen fertilization.Limitations are discussed in terms of land-use and material availability,and soil pH conditions.We call for further experiments with these materials that compare CO_(2)sequestration and other biogeochemical processes in agricultural systems across climates,carried out especially where such materials are conveniently available.

关 键 词：POTENTIAL RELEASE LIMIT 

分 类 号：X51[环境科学与工程—环境工程]