發(fā)布時間：2018-12-08 09:23

【摘要】：通過對浙江省馬蘭頭及其土壤中5種重金屬和12種農藥分析與污染評價,為馬蘭頭及其產地環(huán)境的質量安全評價提供科學依據。對浙江省馬蘭頭樣品中鉛、鎘、鉻元素含量采用濕法消解,砷、汞元素含量采用微波消解,12種農藥分別采用氣相色譜儀和液相色譜儀進行測定,并與相關標準進行比對和評價。結果表明,馬蘭頭及其產地中擬除蟲菊酯均有不同程度地檢出且存在超標現象。從綜合污染指數來看,浙江省馬蘭頭受污染較輕,品質基本安全;研究區(qū)域內馬蘭頭中Pb、Cd、Cr、As、Hg這5種重金屬平均含量為0.18、0.073、1.1、0.046、0.004 mg/kg,其平均含量分別達到了標準限量的180%、146%、220%、23%、40%;研究區(qū)域內產地環(huán)境中5種重金屬含量大致順序為CrPbAsHgCd,變異系數(C.V)值在26.3%~273%之間,表現出極大的非均勻性,表明不同種類重金屬元素之間存在很大差異。綜合污染指數,除1個采摘點已達到重污染水平,其他3個采樣點均未受到污染,處于清潔水平。
[Abstract]:Through the analysis and pollution evaluation of five heavy metals and 12 pesticides in Ma Lan's head and its soil in Zhejiang Province, the scientific basis is provided for the quality and safety evaluation of the environment of Ma Lan's head and its producing area. The contents of lead, cadmium and chromium in head samples of Ma Lan in Zhejiang Province were determined by wet digestion, microwave digestion of arsenic and mercury, and determination of 12 pesticides by gas chromatograph and liquid chromatograph, respectively. Compare and evaluate with related standards. The results showed that pyrethroid was detected in head Ma Lan and its origin to some extent and exceeded the standard. According to the comprehensive pollution index, Ma Lan in Zhejiang Province suffered less pollution and the quality was basically safe. The average content of five heavy metals in Ma Lan's head was 0.180.73 ~ 1.1and 0.046.0.004 mg/kg, which reached the standard limit of 180,146and reached the standard limit of 1800.146cm ~ (22020) ~ (23) ~ 40 ~ (40), respectively. The content of five heavy metals in the environment of the region of origin was approximately in the order of CrPbAsHgCd, coefficient of variation (C.V) between 26.3% and 27.3%, showing great heterogeneity, which indicated that there were great differences among different heavy metal elements. Comprehensive pollution index, except one picking point has reached the level of heavy pollution, the other three sampling points have not been polluted and are in the clean level.
【作者單位】： 縉云縣括蒼山林場;浙江省林產品質量檢測站;臨安市林業(yè)局;
【基金】：林業(yè)公益性行業(yè)項目(201304705)
【分類號】：X82
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本文編號：2368106