用各种添加剂修改的天然二氧化及其环境潜力
Krzysztof Gondek1, Piotr Micek2, Agnieszka Baran1
1Department of Agricultural and Environmental Chemistry, University of Agriculture in Krakow, Al. Mickiewicza 21, 31-120 Krakow, Poland.
Materials (Basel, Switzerland)
|June 28, 2023
概括
改性二氧化 (DT) 有效地固定重金属,如,,和. 将生物炭或多洛米特添加到化DT中,大大减少了金属的漏,产生了毒性较低且经济可行的吸附剂.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 地质化学 地质化学
背景情况:
- 化学污染,特别是来自重金属的化学污染,对环境和健康构成重大风险.
- 二氧化 (DT) 是一种天然存在的材料,具有重金属不动化的潜力.
- 烧焦的二氧化可能有释放重金属的风险,因此需要对性能进行修改以实现更安全的应用.
研究的目的:
- 开发一种简单,廉价和改进的重金属固定材料.
- 为了评估用生物炭,多洛米特和本托尼特等添加剂修改二氧化石的有效性.
主要方法:
- 烧焦的二氧化石被制成三种粒度 (0-1毫米,0-0.5毫米,5-100微米).
- 使用75%的二氧化和25%的添加剂制造了二氧化混合物:生物炭 (BC),多洛米特 (DL) 或托尼特 (BN).
- 对水性提取物进行重金属 (Cd,Zn,Pb,Ni) 分析,以评估固定效率和毒性.
主要成果:
- 用生物炭和多洛米特丰富化二氧化,在水性提取物中显著减少或消除Cd,Zn,Pb和Ni.
- 特定的表面积和添加剂类型对于固定性能至关重要.
- 藻石与多洛米特和本托尼特的混合物表现出最低的毒性.
结论:
- 改性二氧化石,特别是用多洛和生物炭,为重金属固定提供了一种有效且不那么有毒的解决方案.
- 使用当地原材料生产吸附剂可以降低成本和环境影响.
- 这些发现支持从改性藻石生产高性能吸附剂的经济可行性和环境效益.
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