本文關(guān)鍵詞： 細(xì)河 重金屬 污染評(píng)價(jià) PMF 源解析　出處：《農(nóng)業(yè)環(huán)境科學(xué)學(xué)報(bào)》2017年03期 　論文類型：期刊論文

【摘要】：由于長(zhǎng)期接納沈陽市工業(yè)廢水和生活污水,細(xì)河水質(zhì)和周邊土壤污染嚴(yán)重。2015年10月采集細(xì)河流域農(nóng)田表層(0~20 cm)土壤樣品134份,分析土壤中重金屬Hg、As、Pb、Cd、Ni、Cr、Zn和Cu的含量分布特征并進(jìn)行污染評(píng)價(jià),首次采用正定矩陣因子分析法(PMF)對(duì)該地區(qū)8種重金屬來源進(jìn)行分析,為土壤重金屬源解析方法學(xué)評(píng)價(jià)提供依據(jù)。結(jié)果表明:細(xì)河流域農(nóng)田土壤中Hg、As、Pb、Cd、Ni、Cr、Zn、Cu含量范圍分別為0.04~1.85、4.80~11.70、10.80~36.70、0.09~1.50、22.30~47.40、19.60~104.00、71.40~242.00、31.20~105.00 mg·kg~(-1),其中Hg、Cd、Zn、Cu、Ni和Cr含量均值是沈陽市土壤背景值的3.80、2.50、2.04、2.03、1.14倍和1.02倍,Cd、Cu和Hg的含量超過土壤環(huán)境質(zhì)量標(biāo)準(zhǔn)(GB 15618—1995)樣點(diǎn)比例分別為48%、9%、9%。單因子污染指數(shù)評(píng)價(jià)結(jié)果顯示Hg和Cd污染最為嚴(yán)重,污染指數(shù)均值分別為4.52和2.96;內(nèi)梅羅綜合污染指數(shù)均值為4.13,說明研究區(qū)域總體為重度污染。PMF模型解析出重金屬污染來源有:工業(yè)污染源貢獻(xiàn)率36.5%,交通污染源和大氣沉降綜合污染源貢獻(xiàn)率23.5%,農(nóng)業(yè)污染源貢獻(xiàn)率20.8%,自然成土母質(zhì)源貢獻(xiàn)率19.2%。
[Abstract]:Due to the long-term acceptance of industrial wastewater and domestic sewage in Shenyang, the water quality of the river and the surrounding soil are seriously polluted. In October 2015, 134 soil samples were collected from the surface layer of farmland in the river basin. In this paper, the distribution characteristics of heavy metal Hgzn and Cu in soil were analyzed, and the pollution was evaluated. The source of 8 heavy metals in this area was analyzed by positive definite matrix factor analysis (PMF) for the first time. The results showed that the content range of HgsAsPbCdCU NiCrCrZnZn-Cu in farmland soil was 0.041.854.8011.7011.7010.8010.800.046.709.501.500.300.4019.6047.604.604.6071.4031.20mg 路kg ~ (-1) mg 路kg ~ (-1) ~ (-1), and the mean values of HgncCuCuCu Ni and Cr were 3.80 ~ 2.502.042.031.14 times and 1.02 times of the soil background value of Shenyang City respectively, and the average values of the contents of ZnCuCu and Cr were 3.80 ~ 2.502.042.031.14 times and 1.02 times of the soil background value of Shenyang City, respectively. The results of single-factor pollution index evaluation showed that Hg and CD pollution were the most serious. The mean value of pollution index was 4.52 and 2.96, respectively, and the mean value of Nemero comprehensive pollution index was 4.13, which indicated that the pollution sources of heavy metals in the study area were heavy pollution. PMF model showed that the sources of heavy metal pollution were: 36.5 percent of industrial pollution sources, 36.5 percent of traffic pollution sources and air pollution. The contribution rate of comprehensive pollution source of sedimentation was 23.5. the contribution rate of agricultural pollution source was 20.8. the contribution rate of natural parent material source was 19.22.
【作者單位】： 中國(guó)科學(xué)院大學(xué)資源與環(huán)境學(xué)院;中國(guó)科學(xué)院沈陽應(yīng)用生態(tài)研究所;
【基金】：國(guó)家科技部國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016YFD0800303) 農(nóng)業(yè)部國(guó)家風(fēng)險(xiǎn)評(píng)估國(guó)家農(nóng)產(chǎn)品質(zhì)量安全風(fēng)險(xiǎn)評(píng)估項(xiàng)目(GJFP201601306)~~
【分類號(hào)】：X825
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本文編號(hào)：1508216