福建省稻米铅污染状况的调查与评价

发布时间：2018-10-16 18:04

【摘要】：为了了解福建省稻米铅的污染状况,调查了福建省40个县(市、区)、118个水稻品种、395个稻米样品中铅的含量,同时也调查了相应的表层土壤样品中全铅和有效铅的含量,并进行了评价和分析。结果表明:(1)土壤全铅含量在4.70~849.6 mg·kg~(-1)之间,绝大多数土壤的全铅含量均低于国家土壤环境质量标准中的二级标准(250 mg·kg~(-1),pH值不大于6.5):土壤有效铅(DTPA提取)含量介于1.81~210.0 mg·kg~(-1)之间,超过《福建省农业土壤重金属污染分类标准》中的二级标准(DTPA有效铅不大于28 mg·kg~(-1))的占7.1%。(2)各品种水稻糙米铅的平均含量介于0.04 mg·kg~(-1)和0.23 mg·kg~(-1)之间,糙米铅的最高含量为0.57 mg·kg~(-1),23.3%的糙米中铅含量超过了国家《食品中污染物限量》中稻谷铅的限量值(0.2 mg·kg~(-1))。(3)各水稻品种铅的平均有效量基富集系数(土壤-糙米)介于0.003和0.159之间,差异较大。可分为高富集(有效量基富集系数大于0.05)、中富集(有效量基富集系数介于0.01~0.05)和低富集(有效量基富集系数小于0.01)3类。(4)调查区水稻糙米铅的污染程度明显高于土壤铅的污染程度,很可能反映部分调查区大气铅沉降对稻米铅的富集有一定影响,应该引起重视。
[Abstract]:In order to understand the pollution of rice lead in Fujian Province, the lead content in 395 rice samples from 118 rice varieties in 40 counties (cities and districts) of Fujian Province was investigated, and the total lead and available lead contents in the corresponding topsoil samples were also investigated. The evaluation and analysis are carried out. The results showed that: (1) the total lead content of soil was between 4.70,849.6 mg kg~ (-1), and the content of total lead in most soils was lower than that of the second grade standard (250 mg kg~ (-1), pH) < 6.5), and the content of available lead (DTPA) in soil was between 1.81 mg kg~ (-1) and 210.0 mg kg~ (-1). (2) the average content of lead in brown rice was between 0.04 mg kg~ (-1) and 0.23 mg kg~ (-1), which exceeded the second grade standard (DTPA effective lead < 28 mg kg~ (-1) in Fujian Agricultural soil heavy Metal pollution Classification Standard, (2) the average content of lead in brown rice was between 0.04 mg kg~ (-1) and 0.23 mg kg~ (-1), and the average content of lead in brown rice was between 0.04 mg kg~ (-1) and 0.23 mg kg~ (-1). The highest content of lead in brown rice was 0. 57 mg kg~ (-1), and the lead content in 23. 3% of brown rice exceeded the national limit of lead in rice (0. 2 mg kg~ (-1). (3). The average effective basal enrichment coefficient of lead (soil-brown rice) was between 0.003 and 0.159. There is a big difference. It can be divided into three categories: high enrichment (the enrichment coefficient of effective quantity is greater than 0.05), medium enrichment (the enrichment coefficient of effective quantity is between 0.01 and 0.05) and low enrichment (the enrichment coefficient of effective quantity is less than 0.01). (4) the pollution degree of lead in brown rice in the investigation area is obviously higher than that in soil. It is likely that the atmospheric lead deposition in some survey areas has a certain effect on the accumulation of lead in rice, which should be paid more attention to.
【作者单位】：福建省农产品质量安全检验检测中心;
【分类号】：S511;X826

【相似文献】