使用可回收合剂在混凝土制造中的CO2矿化方法的特点和环境效益
Jiajie Wang1, Ryo Miyama2, Vani Novita Alviani2
1Graduate School of Environmental Studies, Tohoku University, Sendai, 980-8579, Japan. wang.jiajie.e4@tohoku.ac.jp.
Scientific reports
|December 9, 2025
概括
本研究展示了一种可持续的混凝土废物管理方法,使用可回收的化剂来捕获二氧化碳. 这一过程减少了混凝土制造中的废物和温室气体排放.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 混凝土制造产生大量的固体废物和二氧化碳排放.
- 传统的二氧化碳矿化方法通常涉及大量的试剂使用和废水,阻碍了可持续性.
- 可循环结合剂辅助的二氧化碳矿化方法的实用性和环境效益需要进一步研究.
研究的目的:
- 用GLDA和混凝土污泥蛋糕评估可回收的合剂辅助CO2矿化特性.
- 评估这种可持续方法的循环解决实用性和净环境效益.
- 量化二氧化碳矿化和残留物减少.
主要方法:
- 实验使用绿色合剂GLDA作为提取剂和混凝土杆设施的污泥蛋糕.
- 在GLDA溶液的十个连续重复使用周期中评估了Ca提取效率.
- 确定了二氧化碳矿化能力,并进行了未来生命周期评估 (LCA).
主要成果:
- 稳定的Ca提取效率在10个循环中保持不变,残留物质减少了25%.
- 成功地矿化了每公斤污泥蛋糕156g的二氧化碳,作为CaCO3.
- 生命周期评估表明,全球变暖潜力减少了16.1%,其他环境影响也减少了.
结论:
- 可回收合剂辅助CO2矿化是混凝土行业的实用和可持续的解决方案.
- 这种方法有效地将废物最小化与永久的二氧化碳储存相结合.
- 该过程可显著减少环境影响,包括温室气体排放和废物产生.
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