使用选定的修改来减少受污染的底层沉积物中的金属流动性和生态毒性
Agnieszka Baran1, FilipM G Tack2, Antoine Delemazure2
1Department of Agricultural and Environmental Chemistry, University of Agricultural in Krakow, Al. Mickiewicza 21, 31-120 Kraków, Poland.
Journal of environmental management
|May 25, 2024
概括
像生物炭和多洛米特这样的工业副产品可以固定沉积物中的金属,减少生态毒性. 然而,纤维素废物仍然是有毒的,这凸显了循环经济应用中需要仔细选择的需要.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 生态毒理学 生态毒理学
背景情况:
- 沉积物被金属污染给环境带来了风险.
- 有效的金属固定化策略对于沉积物整治至关重要.
- 利用工业副产品的循环经济方法正在获得引力.
研究的目的:
- 为了评估纤维素废物,生物炭和多洛米特用于沉积物中的金属固定.
- 评估这些修订对金属吸附能力的影响.
- 为了确定沉积物/修正物混合物的生态毒性.
主要方法:
- 沉积物样本被修改为各种度的纤维素废物,生物炭和多洛米特.
- 通过测量Q和表面电荷等参数来评估金属吸附能力.
- 使用生物试验评估了生态毒性.
- 分析了特定表面积 (SSA) 和毛孔体积 (VN2) 等物理性质.
主要成果:
- 修改效率取决于pH值,随着修改度的增加而增加.
- 多洛米特和纤维素废物表现出更高的负表面电荷,增强了阴离子的吸引力和金属吸收.
- 纤维素废弃物显示出与OH组相关的金属固定度最高.
- 生物炭的固定涉及表面积和毛孔体积,尽管表面电荷减少.
- 所有修正案都增加了SSA和VN2,提供了更多的吸附点.
- 多洛米特和生物炭混合物通常显示生态毒性降低,而纤维素废物混合物仍然有毒.
结论:
- 重复使用的工业副产品可以有效地限制污染沉积物的金属流动性.
- 多洛米特和生物炭在沉积物整治和循环经济整合方面表现有前景.
- 由于其持续的毒性,纤维素废物需要进一步调查.
- 修改选择对于成功和安全的沉积物管理至关重要.
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