舟山沿海土壤機油污染的電阻率變化特征及物理影響因素研究
發(fā)布時間:2018-06-18 18:14
本文選題:機油污染土 + 含水率��; 參考:《土壤通報》2017年05期
【摘要】:為探索舟山沿海土壤在機油污染情況下電阻率的變化規(guī)律及影響因素,通過室內配制污染土,采用單因素分析法研究機油污染砂土、砂質壤土和粉砂質壤土的電阻率變化與土壤質地類型、含水率、含油率及時間的關系。結果表明,土壤構成及含水率與含機油率均對土壤電阻率產生影響。未污染和污染土的電阻率隨著含水率的增加呈冪指數下降趨勢,其規(guī)律符合Archie公式,同時含水率對土壤電阻率的影響大于含油率的影響,并且在一定程度上機油的存在會削弱含水率的影響。5%含水率時,砂質壤土電阻率隨含油率增加變化幅度最大,砂土次之,粉砂質壤土最小;15%含水率時,電阻率變化幅度為砂土砂質壤土粉砂質壤土。另外,低含水率(5%水)下機油污染粉砂質壤土電阻率隨時間的變化波動減小,而高含水率(15%)下則是波動增加,即在經過18~20天后出現小幅下降隨后繼續(xù)增加。根據污染土壤電阻率變化特征可以判斷是否存在機油污染,監(jiān)測效果砂土和砂質壤土優(yōu)于粉砂質壤土,低含水率條件監(jiān)測效果優(yōu)于高含水率條件。研究成果可為土壤機油污染的電阻率法監(jiān)測提供理論支持。
[Abstract]:In order to explore the variation of resistivity of soil in Zhoushan coastal area under the condition of oil pollution and its influencing factors, the single factor analysis method was used to study the oil contaminated sandy soil through indoor compounding of contaminated soil. The relationship between resistivity change of sandy loam and silty loam and soil texture, water content, oil content and time. The results showed that soil composition, water content and oil content had an effect on soil resistivity. The resistivity of unpolluted and polluted soil decreased exponentially with the increase of water content, and its law was in accordance with the Archie formula. At the same time, the effect of water content on soil resistivity was greater than that on oil content. And to some extent, the oil content will weaken the effect of water cut. 5% water content, the resistivity of sandy loam soil changes the most with the increase of oil content, sand soil takes second place, and silty loam soil has the lowest moisture content of 15%. The change range of resistivity is sandy loam silty loam. In addition, under the condition of low water content (5% water), the fluctuation of resistivity of silty loam decreased with time, while that of high water content (15%) increased, that is, after 1820 days, the resistivity of silty loam decreased slightly and then continued to increase. According to the characteristics of resistivity variation of contaminated soil, oil pollution can be judged. The monitoring effect of sandy soil and sandy loam is better than silty loam, and the monitoring effect of low moisture content is better than that of high water content. The research results can provide theoretical support for the resistivity monitoring of soil oil pollution.
【作者單位】: 浙江海洋大學水產學院;浙江省海洋漁業(yè)裝備技術研究重點實驗室;
【基金】:國家自然科學基金項目(41502261) 浙江省教育廳一般項目(Y201534409) 浙江省大學生科技創(chuàng)新活動計劃(新苗人才計劃)項目(2016R411015) 浙江海洋大學大學生科技創(chuàng)新活動計劃(育苗人才計劃)項目(YMJH201609)資助
【分類號】:X53
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