【摘要】：為了解徐州市典型稻區(qū)土壤和稻米中重金屬含量及健康風(fēng)險(xiǎn),分別測(cè)定了土壤和稻米中Cu、Zn、Pb、Cd、Ni、As、Hg和Cr的含量,并對(duì)土壤中重金屬污染狀況及稻米中重金屬因攝入所致的健康風(fēng)險(xiǎn)進(jìn)行了評(píng)價(jià)。結(jié)果表明:DXDQ(典型稻區(qū))土壤中As、Hg平均含量分別比中國(guó)土壤元素背景值高出0.24、0.29倍,Cd與其持平,其他5種元素均低于背景值,其中PXHX(西北部)超標(biāo)率最重。但所測(cè)稻區(qū)全部重金屬的含量均低于《土壤環(huán)境質(zhì)量標(biāo)準(zhǔn)》(GB 15618—1995)中的Ⅱ級(jí)標(biāo)準(zhǔn)值。單因子污染指數(shù)顯示所有稻區(qū)土壤重金屬污染等級(jí)為安全;內(nèi)梅羅綜合污染指數(shù)顯示DXDQ、SNLJ(東南部)和PZXH(東部)土壤重金屬污染程度總體呈清潔水平,而PXHX(西北部)則達(dá)警戒水平。33.33%的DXDQ和全部PXHX土壤樣本為中等生態(tài)風(fēng)險(xiǎn),并以Hg為主要貢獻(xiàn)因子,SNLJ和PZXH為低生態(tài)風(fēng)險(xiǎn)。DXDQ和3個(gè)分稻區(qū)稻米中Pb、Ni和As平均含量均超出國(guó)家食品安全標(biāo)準(zhǔn)限制值,其中DXDQ分別超標(biāo)1.70、0.28和1.20倍�；贖Q和HI評(píng)價(jià),食用該區(qū)域生產(chǎn)的稻米對(duì)人體健康產(chǎn)生影響的可能性大,其中As的潛在健康危害突出,應(yīng)引起足夠重視。
[Abstract]:In order to understand the contents of heavy metals and health risks in soil and rice in typical rice areas of Xuzhou City, the contents of Cu,Zn,Pb,Cd,Ni,As,Hg and Cr in soil and rice were determined respectively. The pollution of heavy metals in soil and the health risk of heavy metals intake in rice were evaluated. The results showed that the average content of As,Hg in: DXDQ (typical rice area was 0.24 and 0.29 times higher than that in China, Cd was the same, the other five elements were lower than the background value, and the exceeding standard rate of PXHX (northwest) was the heaviest. However, the contents of all heavy metals in the rice area were lower than those in the soil Environmental quality Standard (GB 15618 鈮，

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