freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

城市表層土壤論文:泉州市城市表層土壤重金屬污染評(píng)價(jià)研究-在線瀏覽

2024-08-07 14:20本頁(yè)面
  

【正文】 人和兒童)產(chǎn)生健康危害。因子分析結(jié)果表明,重金屬Sb、Bi、Sn、Pb、Cu、Zn主要來自交通污染和工業(yè)污染, Cd則來自工業(yè)污染和化肥施用。Fe、Co、Ni、Cr、Li、Sc、Mn等則來源于成土母質(zhì)。 Mn, Sb, Sn, Cd, Pb, Zn, Cu, Hg, Ni wre much higher than their background values of the local soil environment.(2) Based on the background values of local soil, the heavy metal pollution in the urban topsoil of Quanzhou city was estimated using the Geoaccumulation Index and Potential Ecological Risk Index. The results showed that Sb and Hg were much higher dangerous than other pollutants. The Geoaccumulation Index order of different heavy metals was HgSbNiSnCoZnPbLiCdBiMnCrAsFeVCuScTi。 Cd originated from industrial and fertilizer。 Fe, Co, Ni, Cr, Li, Sc and Mn were mainly controlled by natural factors, and they originated from natural sources.【關(guān)鍵詞】城市表層土壤 重金屬污染 環(huán)境質(zhì)量評(píng)價(jià) 泉州市【英文關(guān)鍵詞】urban topsoil heavy metal pollution environmental quality assessment Quanzhou City【目錄】泉州市城市表層土壤重金屬污染評(píng)價(jià)研究摘要45ABSTRACT56第一章 緒論1119 研究背景及意義1112 國(guó)內(nèi)外研究現(xiàn)狀1215 研究?jī)?nèi)容、方法與技術(shù)路線1517 研究目標(biāo)15 研究?jī)?nèi)容1516 研究方法及技術(shù)路線1617參考文獻(xiàn)17
點(diǎn)擊復(fù)制文檔內(nèi)容
黨政相關(guān)相關(guān)推薦
文庫(kù)吧 www.dybbs8.com
備案圖鄂ICP備17016276號(hào)-1