舟山沿海土壤机油污染的电阻率变化特征及物理影响因素研究

发布时间：2018-06-18 18:14

本文选题：机油污染土 + 含水率　；参考：《土壤通报》2017年05期

【摘要】：为探索舟山沿海土壤在机油污染情况下电阻率的变化规律及影响因素,通过室内配制污染土,采用单因素分析法研究机油污染砂土、砂质壤土和粉砂质壤土的电阻率变化与土壤质地类型、含水率、含油率及时间的关系。结果表明,土壤构成及含水率与含机油率均对土壤电阻率产生影响。未污染和污染土的电阻率随着含水率的增加呈幂指数下降趋势,其规律符合Archie公式,同时含水率对土壤电阻率的影响大于含油率的影响,并且在一定程度上机油的存在会削弱含水率的影响。5%含水率时,砂质壤土电阻率随含油率增加变化幅度最大,砂土次之,粉砂质壤土最小;15%含水率时,电阻率变化幅度为砂土砂质壤土粉砂质壤土。另外,低含水率(5%水)下机油污染粉砂质壤土电阻率随时间的变化波动减小,而高含水率(15%)下则是波动增加,即在经过18~20天后出现小幅下降随后继续增加。根据污染土壤电阻率变化特征可以判断是否存在机油污染,监测效果砂土和砂质壤土优于粉砂质壤土,低含水率条件监测效果优于高含水率条件。研究成果可为土壤机油污染的电阻率法监测提供理论支持。
[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.
【作者单位】：浙江海洋大学水产学院;浙江省海洋渔业装备技术研究重点实验室;
【基金】：国家自然科学基金项目(41502261) 浙江省教育厅一般项目(Y201534409) 浙江省大学生科技创新活动计划(新苗人才计划)项目(2016R411015) 浙江海洋大学大学生科技创新活动计划(育苗人才计划)项目(YMJH201609)资助
【分类号】：X53

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