贵州喀斯特地区土壤-辣椒体系重金属元素的生物迁移积累特征

发布时间：2018-03-27 15:34

本文选题：辣椒　切入点：种植土壤　出处：《食品科学》2017年21期

【摘要】：采集喀斯特地区(遵义虾子与贵阳花溪)的辣椒及种植土壤样品,利用电感耦合等离子体质谱仪和电感耦合等离子体原子发射光谱仪检测辣椒和土壤中13种重金属元素(As、Cd、Pb、Hg、Cr、Cu、Zn、Ni、Tl、Co、Sb、Sn、Mn)的含量,探讨土壤-辣椒体系重金属元素的生物迁移积累特征。结果表明:与HJ/T 332—2006《食用农产品产地环境质量评价标准》相比,土壤中Cd平均含量超标了9.33%,点位超标率为57.89%。与GB 2762—2012《食品中污染物限量》相比,遵义地区辣椒中Cd含量部分超标,超标率为85.71%,花溪地区2个辣椒样品Cr含量超标,分别超标了15.36%和12.18%。辣椒的13种重金属生物富集系数大小顺序为CdCuZnHgSnTlMnSbNiCoCrAsPb,辣椒Cd的生物富集系数为1.138,Pb的生物富集系数为0.001 9。辣椒中Co、Ni、Sn含量与土壤对应金属含量呈显著正相关(P0.05),其余重金属含量与土壤对应元素含量无显著相关性(P0.05)。食用辣椒途径的Cd和Cr每周重金属摄入量远小于世界卫生组织提出的专门针对敏感人群临时性每周人体可耐受摄入量,辣椒Cd、Cr超标不会对人体健康造成影响。在贵州喀斯特Cd高背景值地区种植辣椒应注重辣椒对Cd的富集。
[Abstract]:Samples of pepper and cultivated soil in karst area (Zunyi Shrimp and Guiyang Huaxi) were collected. Inductively coupled plasma mass spectrometer (ICP-MS) and inductively coupled plasma atomic emission spectrometer (ICP-AES) were used to detect the contents of 13 heavy metal elements in capsicum and soil. The characteristics of biomigration and accumulation of heavy metal elements in soil-pepper system were studied. The results showed that compared with HJ/T 332-2006, Environmental quality Evaluation Standard of Edible Farm produce was used. The average CD content in soil exceeded the standard by 9.33, and the point exceeding standard rate was 57.89.Compared with GB2762-2012, the CD content of pepper in Zunyi area was over the standard, and the rate of exceeding the standard was 85.71.The Cr content of two pepper samples in Huaxi area exceeded the standard. The bioenrichment coefficients of 13 heavy metals in capsicum were in the order of CdCuZnHgSnTlMnSbNiCoCrAsPb, and the bioenrichment coefficient of CD in capsicum was 0.001 9. There was no significant correlation between the contents of other heavy metals and the corresponding elements in soil. The intake of CD and Cr per week in the way of consumption of pepper was much smaller than that proposed by the World Health Organization (WHO). The cadmium concentration of capsicum should be paid more attention to in the high background area of Guizhou karst CD.
【作者单位】：贵州大学资源与环境工程学院;贵州大学喀斯特环境与地质灾害重点实验室;贵州大学矿业学院;
【基金】：国家自然科学基金地区科学基金项目(41463009;41563011) 贵州省重点学科建设项目(ZDXK[2015]20) 贵州省教育厅创新群体重大研究项目(黔教合KY字[2016]024) 贵州大学国内一流学科生态学建设项目贵州大学2016年研究生创新基金项目(研理工2016037)
【分类号】：X173

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