溶性酸盐和酸修改对污染土壤中和的生物可用性和生物可访问性的影响
Weiqin Xing1, Linchong Fang1, James A Ippolito2
1School of the Environment, Henan University of Technology, Zhengzhou, Henan 450001, China; International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Safety of Henan Province, Zhengzhou, Henan 450001, China.
The Science of the total environment
|August 20, 2023
概括
通常使用的土壤修正物,如酸盐降低重金属 (Pb/Cd) 在小鼠的吸收,降低脏度. 然而,对生物利用性的影响因器官和变异而异,表明了复杂的健康风险.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 土壤科学 土壤科学
背景情况:
- 土壤中的重金属污染对动物和人类健康构成风险.
- 常见的固定剂在减轻这些风险方面的有效性尚不清楚.
- 了解重金属的生物可用性和生物可访问性对于风险评估至关重要.
研究的目的:
- 调查可溶性酸盐和酸盐修改对土壤重金属 (Pb/Cd) 风险的影响.
- 评估修改土壤对小鼠重金属生物积累的影响.
- 评估土壤中重金属含量与动物组织度之间的关系.
主要方法:
- 被Cd和Pb污染的酸性土壤被可溶性酸盐和托尼特修改.
- 修改后的土壤被化,然后被纳入小鼠料中进行为期10天的暴露研究.
- 分析了肝脏,脏和骨组织的Pb和Cd度;使用SBRC,PBET和DTPA提取评估了生物可访问性和可用性.
主要成果:
- 酸盐修改显著降低了小鼠的脏Pb和Cd度,分别高达80.2%和66.0%.
- 在SBRC试验的胃阶段,本托尼特修改降低了Cd的生物可访问性.
- 在DTPA可提取的土壤金属和脏金属度之间发现了显著的相关性,但对相对生物利用度 (RBA) 的修改影响因器官和终点而异.
结论:
- 溶性酸盐有效地减少了小鼠脏中的Pb和Cd积累,这表明了潜在的缓解策略.
- 土壤修饰在降低重金属风险方面的有效性是复杂的,取决于特定的代理物,目标器官和评估终点.
- 需要进一步的研究,以充分了解长期的健康影响,并优化土壤重金属整治修改策略.
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