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污水污泥作为土壤修饰物的生态风险评估:Eisenia fetida中的致命和次致命影响

Maria Luisa Vannuccini¹, Ramona Assenza², Lucrezia Sturba³

¹Department of Ecological and Biological Sciences, Tuscia University, Largo dell'Università snc, 01100, Viterbo, Italy. marialuisa.vannuccini@unitus.it.

Environmental science and pollution research international

|December 23, 2024

概括

污水污泥土壤修改需要对生态风险进行评估. 对于检测污泥毒性而言,诸如虫组织损伤之类的微致命终点比死亡率更为敏感.

科学领域:

环境科学环境科学
生态毒理学生态毒理学
土壤科学土壤科学

背景情况:

污水污泥作为土壤修饰剂的应用需要对生态风险进行评估.
标准化急性毒性测试对土壤生物的危害提供了有限的洞察力.
为了改进风险评估,提出了包括生理和组织改变在内的次致命终点.

研究的目的:

评估亚致命终点对于评估污水污泥生态风险的适用性.
为了比较急性毒性试验的灵敏度与使用土的亚致命终点.

主要方法:

用土虫Eisenia fetida (经合组织第207号) 对污水污泥样本进行急性毒性检测.
对死亡率,体重,形态和肠道组织学的评估.
来自两个废水处理厂 (A和B) 的污泥稀释的分析.

主要成果:

在暴露于污泥稀释的虫中观察到较低的死亡率,植物之间没有显著差异.
所有的都表现出外部身体的变化 (囊泡,胀,收缩,变色).
组织学检查显示组织损伤 (表皮,肌肉,原组织),不论污泥的来源.

结论:

标准化急性毒性终点对虫暴露于污水污泥的敏感度不足.
细致的终点,特别是身体形态和组织组织学,更适合评估污泥引起的生态风险.
亚致命终点可以更准确地评估对土壤生物群的潜在有害影响.

关键词:

有急性毒性的急性毒性.虫是地球上的一种虫.历史学历史学历史学污水污泥的污水污泥是污水中的污泥.

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