石油污染对土壤毛细水上升特性的影响

发布时间：2018-02-15 00:24

本文关键词： 石油污染毛细水土壤　出处：《灌溉排水学报》2017年09期 　论文类型：期刊论文

【摘要】：为了研究石油污染对不同土质毛细水上升高度、上升速率及毛细含水率的影响,采用室内土柱试验,研究了3种不同土质土壤(X土、黄绵土和风沙土)在5个不同污染梯度(0%、0.5%、1%、2%和4%)下的毛细水上升规律。结果表明,3种土壤毛细水上升高度均随时间的延长而增加,且土壤毛细水上升高度与时间均符合良好的幂函数,但增幅均随时间的延长而减小;在相同上升时段内,未被污染的3种土壤毛细水上升高度均明显大于石油污染土壤,并且污染程度越高,毛细水上升高度越小;相同时间段,清洁土壤和0.5%含油率的土壤毛细水上升高度均表现为风沙土上升速率最快、黄绵土次之、X土最慢,1%、2%和4%含油率的毛细水上升高度和上升速率变化趋势相同,均表现为黄绵土最大、X土次之、风沙土最小;随着毛细水上升高度的增加,X土、黄绵土、风沙土毛细水量均呈减小趋势,且毛细水量均随着污染程度的加剧而降低,土壤储水量和毛细水水量有着相同的变化趋势。
[Abstract]:In order to study the effect of oil pollution on different soil capillary water height, the impact of rising rate and capillary moisture content, the soil column experiments on 3 different soils (X soil, loessial soil and aeolian sandy soil) in 5 different pollution levels (0%, 0.5%, 1%, 2% and 4%) of capillary rise under the law. The results showed that 3 kinds of soil capillary water height are increasing with the time, and the soil rising height of capillary water and time are in line with good power function, but the increase was decreased along with the prolongation of time; at the same time is not increased, 3 kinds of soil capillary water pollution increase the height were significantly higher than that of petroleum contaminated soil, and the pollution level is higher, the rising height of capillary water is smaller; the same time, the soil capillary water clean soil and 0.5% oil-bearing rate rising height showed the fastest rising rate of wind sand, Huang Mian soil and soil X the slowest, 1%, and 2% 4% oil content of capillary water rising height and rate of rise of the same trend, showed the largest X in loessial soil, soil and sandy soil minimum; with the increase of height of capillary rise X soil, loessial soil, sandy soil capillary water content decreased, and the capillary water were with the aggravation of pollution decreased soil water and capillary water content has the same trend.

【作者单位】：陕西省土地工程建设集团有限责任公司;西北农林科技大学资源环境学院;陕西地建土地工程技术研究院有限责任公司;国土资源部退化及未利用土地整治工程重点实验室;
【基金】：陕西省重点科技创新团队计划项目(2016KCT-23)
【分类号】：S152.7;X53

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