コンクリートと窒素の混合物は健康と環境に大きな利点をもたらすかもしれない(Concrete-nitrogen mix may provide major health and environment benefits)

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2024-06-14 バーミンガム大学

新しい研究によると、コンクリートに窒素を加えることで、建設業によって発生する窒素酸化物(NOx)排出量を大幅に削減できる可能性があります。窒素化コンクリートは、2021年の業界関連排出量の6-13%に相当する3.4-6.9メガトンのNOxを削減できるとされています。2050年までに、累計で131-384メガトンのNOx削減が見込まれ、これは75-260年分の障害調整生存年(DALY)に相当します。NOxは酸性雨やオゾン層破壊に寄与し、特に呼吸器疾患に関連する健康リスクを引き起こします。この技術は特に急速に都市化する地域でのNOx排出削減に有望で、経済価値の創出も期待されます。研究者は、CO2排出削減のための既存のカーボン化システムを活用し、窒素化コンクリートの物流ネットワークを最適化することを提案しています。

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世界のNOx吸収量に対するコンクリート窒素化の寄与 Contribution of concrete nitrogenation to global NOx uptake

Ning Zhang,Georg Schiller,Hessam Azarijafari,Zhi Cao,Bin Xi,Yuli Shan,Huanyu Li,Huabo Duan &Jiakuan Yang
Nature Cities  Published:14 June 2024
DOI:https://doi.org/10.1038/s44284-024-00084-y

コンクリートと窒素の混合物は健康と環境に大きな利点をもたらすかもしれない(Concrete-nitrogen mix may provide major health and environment benefits)

Abstract

The renewal and expansion of the built environment within the context of rapid urbanization are imposing new benchmarks for resource management, particularly concerning the billions of tons of consumption and waste generation of concrete materials. The commercialization of carbonation in cementitious materials is underway, opening up possibilities for nitrogenation that has been well documented in recent experimental studies. Here we further utilize a dynamic model to estimate the mitigation potentials of NOx by the promotion of concrete nitrogenation in a global urbanization scenario, projecting its global health and economic benefits toward 2050. Our analysis reveals that concrete nitrogenation can theoretically contribute to a reduction in NOx emissions by approximately 3.4–6.9 Mt—or 6–13% of global industry-related emissions—in 2021. The cumulative economic potential is projected to exceed 150–160 trillion USD, accompanied by a NOx mitigation of 131–384 Mt between 2021 and 2050, equivalent to 75–260 years potentially lost to premature death and reduced quality of life (estimated in terms of disability-adjusted life years). However, both carbonation and nitrogenation techniques rely on the availability of alkaline reactive components within the material, leading to competition. Although significant uncertainty remains, our comparison reveals that, in most regions, promoting the commercialization of nitrogenation exhibits higher feasibility and prioritization over carbonation in relation to both economic and environmental benefits.

1900環境一般
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