【摘要】：為了了解福建省稻米鉛的污染狀況,調(diào)查了福建省40個(gè)縣(市、區(qū))、118個(gè)水稻品種、395個(gè)稻米樣品中鉛的含量,同時(shí)也調(diào)查了相應(yīng)的表層土壤樣品中全鉛和有效鉛的含量,并進(jìn)行了評價(jià)和分析。結(jié)果表明:(1)土壤全鉛含量在4.70~849.6 mg·kg~(-1)之間,絕大多數(shù)土壤的全鉛含量均低于國家土壤環(huán)境質(zhì)量標(biāo)準(zhǔn)中的二級標(biāo)準(zhǔn)(250 mg·kg~(-1),pH值不大于6.5):土壤有效鉛(DTPA提取)含量介于1.81~210.0 mg·kg~(-1)之間,超過《福建省農(nóng)業(yè)土壤重金屬污染分類標(biāo)準(zhǔn)》中的二級標(biāo)準(zhǔn)(DTPA有效鉛不大于28 mg·kg~(-1))的占7.1%。(2)各品種水稻糙米鉛的平均含量介于0.04 mg·kg~(-1)和0.23 mg·kg~(-1)之間,糙米鉛的最高含量為0.57 mg·kg~(-1),23.3%的糙米中鉛含量超過了國家《食品中污染物限量》中稻谷鉛的限量值(0.2 mg·kg~(-1))。(3)各水稻品種鉛的平均有效量基富集系數(shù)(土壤-糙米)介于0.003和0.159之間,差異較大�？煞譃楦吒患�(有效量基富集系數(shù)大于0.05)、中富集(有效量基富集系數(shù)介于0.01~0.05)和低富集(有效量基富集系數(shù)小于0.01)3類。(4)調(diào)查區(qū)水稻糙米鉛的污染程度明顯高于土壤鉛的污染程度,很可能反映部分調(diào)查區(qū)大氣鉛沉降對稻米鉛的富集有一定影響,應(yīng)該引起重視。
[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.
【作者單位】： 福建省農(nóng)產(chǎn)品質(zhì)量安全檢驗(yàn)檢測中心;
【分類號(hào)】：S511;X826

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