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生物聚合物酶诱导碳酸盐沉 (EICP) 用于石墨尾矿的绿色固化/稳定:机械,浸出和微观结构特征

Chengwei Zhang¹, Changbo Du¹, Bing Liang²

¹School of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China.

Environmental research

|March 26, 2025

概括

本研究介绍了一种绿色固化和稳定 (S/S) 方法,用于使用酸盐 (CTS) 和酶诱导碳酸盐沉 (EICP) 的石墨尾矿. 通过CTS-EICP处理,可显著提高机械强度,并有效固定重金属,提供环保的解决方案.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
生物技术是生物技术.

背景情况:

石墨尾矿由于含有重金属而造成环境和健康风险.
现有的石墨尾矿回收方法昂贵,二氧化碳密集型,重金属稳定性有限.
需要可持续和有效的石墨废弃物管理方法.

研究的目的:

为石墨尾矿的绿色固化和稳定 (S/S) 提出一种新的,环保的战略.
调查酸盐 (CTS) 和酶诱导碳酸盐沉 (EICP) 对石墨尾矿的协同作用.
评估CTS-EICP对石墨尾矿机械强度和重金属固定的影响.

主要方法:

在石墨尾矿的酶诱导碳酸盐沉 (EICP) 过程中引入生物聚合物奇托 (CTS).
机械性能的评估,包括不受限制的压力强度 (UCS) 和分割拉伸强度 (STS).
评估重金属固定速率和液的pH稳定性.

主要成果:

与单独使用EICP相比,CTS-EICP治疗显著改善了UCS,STS和碳酸生成率.
最佳的CTS含量 (0.15%) 导致UCS为897.8kPa,STS为258.1kPa,以及8.03%的CaCO3.
重金属的固定率达到了92.61%-100%,液的pH稳定在7.90-8.26.2之间.

结论:

CTS-EICP创建了一个多层复合物屏障结构 ("尾盘-CTS-碳酸盐-CTS-尾盘"),增强S/S.
该机制涉及CTS通过尿酶稳定和交联促进碳酸盐晶体形成.
这种生物聚合物-EICP协同方法为含重金属尾矿的多维绿色S / S提供了新的视角.

关键词:

生物聚合物的生物聚合物.由酶诱导的碳酸盐沉.石墨尾矿的废弃物石墨尾矿的废弃物重金属污染是重金属的污染.机械强度机械强度机械强度

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