无活化石棉水泥对土壤生态系统的生态毒理影响
Ilaria Negri1, Erica Saldi1, Giancarlo Capitani2
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Catholic University of the Sacred Heart, Piacenza 29122, Italy.
Waste management (New York, N.Y.)
|April 24, 2025
概括
热失活的石棉水泥 (DAC) 对土壤无脊椎动物 (如Folsomia candida) 构成生态风险. 含有石灰的绿色DAC比红色DAC更有毒,这凸显了安全的石棉水泥回收利用的必要性.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 土壤生态学 土壤生态学
背景情况:
- 石棉水泥 (AC) 在建筑中广泛使用,其热失活 (DAC) 是减轻健康风险的一种方法.
- 了解DAC对土壤生态系统的生态影响对于安全的废物管理和处置至关重要.
- 土壤无脊椎动物在土壤健康和生态系统运行中发挥着至关重要的作用.
研究的目的:
- 评估两种类型的热失活化石棉水泥 (DAC) 对土壤无脊椎动物Folsomia candida的生态毒理影响.
- 为了比较在氧化 (红色DAC) 和减少 (绿色DAC) 条件下生产的DAC的毒性概况.
- 为了确定对DAC中观察到的毒性负责的成分.
主要方法:
- 两个DAC材料 (红色和绿色) 通过在1100°C和1150°C分别加热AC来制备.
- 在28天的时间里,Folsomia candida的幼虫被暴露在1:1和1:10的DAC:土壤混合物中.
- 成人和青少年人口被计数以评估生存率和生殖率.
主要成果:
- 红色DAC在1:1度下显著降低幼虫的产量,但不会导致成年人死亡.
- 在1:1度下,绿色DAC诱导成人死亡,完全抑制幼虫的生长.
- 两种DAC类型都含有二氧化玻璃,这是一种潜在的脱水剂. 绿色DAC还含有石灰 (CaO),它可以改变土壤的pH.
结论:
- DAC对folsomia candida的毒性因失活条件和化学成分而有所不同.
- 绿色DAC中的玻璃和石灰可能会通过脱水和性导致其更高的毒性.
- 将DAC适当回收成稳定的矩阵是防止生态污染和促进循环经济的必要条件.
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