在富含铁的石灰岩基地质聚合物中有效稳定和铜,以及对物理性质的影响
Rachel Yanou Nkwaju1, Joëlle Nadia Fekoua Nouping1, Soumayah Bachirou1
1Local Materials Promotion Authority, MINRESI/MIPROMALO, Nkolbikok, Yaoundé P.O. Box 2396, Cameroon.
Materials (Basel, Switzerland)
|December 23, 2023
概括
这项研究探讨了使用Na-poly ((ferro-silico-aluminate) 地质聚合物进行重金属稳定. 虽然它对铜 (99%) 有效,但对的保留很差,并且对地质聚合物产生了负面影响.
科学领域:
- 地质聚合物化学 的化学
- 材料科学是一种材料科学.
- 环境工程环境工程
背景情况:
- 重金属污染对环境构成风险.
- 地质聚合物为废物稳定提供了潜力.
- 纳聚 ((ferro-silico-aluminate) 是一种富含铁的地质聚合物粘合剂.
研究的目的:
- 为了评估一个Na-多聚合物的重金属稳定效率 ((铁-酸) 地质聚合物.
- 评估稳定重金属对地质聚合物的结构性质的影响.
- 阐明地质聚合物矩阵内的重金属稳定机制.
主要方法:
- 制备一种活性铁丰富的石质土壤结合剂 (地质聚合物).
- 人工土壤被重金属离子 (Cu,Cd) 污染.
- 浸出试验 (脱离离子水,0.1M HCl) 来评估稳定效率.
- 微观结构和物理性质分析 (压力强度,密度,多孔度,吸水能力).
主要成果:
- 地质聚合物在酸性 (低pH) 条件下表现出较低的稳定能力,而不是性 (高pH) 条件下.
- 离子的高稳定效率 (99%);Cd离子的保留能力较差.
- 重金属诱导结构恶化:压力强度和散装密度下降,多孔性增加和吸水.
结论:
- Na-poly ((ferro-silico-aluminate) 地质聚合物显示出可变的重金属稳定功效,取决于金属类型和pH值.
- 稳定机制涉及离子交换和物理孔相互作用.
- 加入重金属会对地质聚合物的结构完整性产生负面影响,影响其作为建筑材料的使用.
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