摘要
分析喀斯特地区土壤及不同生长年限地龙中14种稀土元素在土壤系统中的分布模式特征、富集特征、时间动态含量规律、元素之间的相关性,为地龙中稀土元素健康风险评价及富集特征提供科学依据。采集不同年限地龙样品与土壤,采用电感耦合等离子体质谱(ICP-MS)测定不同年限地龙、土壤中稀土元素含量。结果表明,土壤中稀土元素与地龙中14种稀土元素的分布模式特征呈现显著继承性,在地龙体内运移时未发生明显分馏,生物富集系数仅为0.01~0.02,稀土元素含量与生长年限无显著关联,元素之间存在显著正相关,地龙中稀土元素含量大小顺序为Ce>La>Nd>Pr>Gd>Sm>Dy>Eu>Er>Yb>Tb>Ho>Tm>Lu。地龙中稀土元素分布特征明显被土壤间接调控生物累积,其富集能力微弱,地龙中稀土元素的每日允许摄入量(Acceptable daily intake,ADI)远低于安全限值0.07 mg(/kg·d),未构成健康风险,为喀斯特地区土壤养殖地龙提供参考。
To analyze the distribution patterns,enrichment characteristics,temporal dynamic content patterns,and correlations between 14 rare earth elements in soil systems of karst areas and different growth years of earthworms and to provide scientific basis for the health risk assessment and enrichment characteristics of rare earth elements in Dilong.Samples of different ages of earthworms and soil were collecting,and using inductively coupled plasma mass spectrometry(ICP-MS)to determine the content of rare earth elements in earthworms and soil of different ages.Results showed that the distribution patterns of soil rare earth elements and 14 rare earth elements in earthworms showed significant inheritance.They did not undergo significant fractionation during transport within the earthworms,and the biological enrichment coefficient was only 0.01-0.02.There was no significant correlation between rare earth element content and growth age,but there was a significant positive correlation between elements.The rare earth element content in earthworms was in the order of Ce>La>Nd>Pr>Gd>Sm>Dy>Eu>Er>Yb>Tb>Ho>Tm>Lu.The distribution characteristics of rare earth elements in earthworms were clearly indirectly regulated by soil for bioaccumulation,and their enrichment ability was weak.The acceptable daily intake(ADI)of rare earth elements in earthworms was far below the safety limit of 0.07 mg(/kg·d),and did not pose a health risk.This provided a reference for soil aquaculture of earthworms in karst areas.
作者
吕楚涵
粟华生
昝川南
李婷
LYU Chu-han;SU Hua-sheng;ZAN Huan-nan;LI Ting(Guangxi Agricultural Vocational and Technical University,Nanning 530007,China;Guangxi-asean Food Inspection and Testing Center,Nanning 530021,China)
出处
《湖北农业科学》
2025年第12期194-198,227,共6页
Hubei Agricultural Sciences
基金
2023年广西中医药多学科交叉创新团队项目(GZKJ2309)
2022年度广西农业科技自筹经费项目(Z202231)。
关键词
地龙
稀土元素
富集
土壤
健康风险
Dilong
rare earth elements
enrichment
soil
health risks
