通过化学稳定和自然减弱来减少污水污泥的毒性
Caio Rodrigues Maluf1, Maria Gabriela Franco Lima1, Bianca Gonzaga Arantes1
1Biology Institute, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.
The Science of the total environment
|December 31, 2025
概括
90天的自然减弱 (NA) 有效地排毒了污水污泥 (SS),使其更安全地对土壤进行修改. 仅仅是化学稳定是不够的,但NA证明是一个低成本,有前途的战略,以减少SS生态毒性.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 生态毒理学 生态毒理学
背景情况:
- 污水污泥 (SS) 作为土壤修补剂的利用需要强有力的毒性减缓.
- 用水合石灰进行化学稳定 (CS) 和自然减弱 (NA) 是潜在的策略.
研究的目的:
- 为了比较CS与NA在降低来自巴西污水处理厂 (WWTP) 的SS生态毒性的有效性.
- 在治疗前和治疗后评估SS的植物毒性和细胞毒性.
主要方法:
- 使用 Lactuca sativa (植物毒性) 和 Allium cepa (细胞毒性) 的生态毒理学生物测试.
- 在零时 (T0) 和90天后的NA (T90) 分析的微宇宙化物.
- 处理包括与土壤混合的原始SS和化学稳定SS (SSS).
主要成果:
- 在T0时,SSS和SS混合物都显示出显著的植物毒性,并在Allium cepa.中诱导高频率的染色体异常 (CA) 和微核 (MN).
- 经过90天的NA,有毒效应被消除;L. sativa根的生长被刺激,CA/MN频率恢复到控制水平.
- 单独的CS不足以消除遗传毒性和变异性.
结论:
- 90天的自然减弱期对排污污泥的排毒更有效,而不是仅仅通过化学稳定.
- 自然减弱是一种有前途的,低成本的方法,用于更安全的污水污泥农业应用.
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