真空蒸馏提取与原位采集对土壤水氢氧稳定同位素值比值的影响
发布时间：2018-07-17 08:10
【摘要】：为了研究不同采样方法对采集的土壤水氢氧稳定同位素比值的影响,设计了室内降水入渗模拟试验,收集土柱底部出流水、土壤溶液采样器原位采集10cm、40cm、70cm、100cm处的土壤水,在相同层位采集土壤样品并采用真空蒸馏法提取土壤水。通过样品的氢氧稳定同位素比值对比分析可知,降水入渗干燥的土壤过程中土颗粒优先吸附轻同位素,第一个收集的水分具有最正的氢氧稳定同位素比值;真空蒸馏法提取的土壤水是土壤吸湿水和入渗水分的混合,土壤溶液采样器原位采集的土壤水代表土壤中流动的水分,此水分是土壤中可被有效利用的水分。
[Abstract]:In order to study the effect of different sampling methods on the ratio of hydrogen and oxygen stable isotopes in soil water, a simulated experiment was designed to collect water from the bottom of the soil column. Soil solution sampler was used to collect soil water at 10cm, 40cm, 70cm and 100cm in situ. Soil samples were collected at the same level and vacuum distillation was used to extract soil water. Through the comparative analysis of hydrogen and oxygen stable isotope ratio of the samples, it is found that the soil particles first adsorb light isotopes in the process of precipitation infiltration and dry soil, the first collected moisture has the most positive hydrogen oxygen stable isotope ratio, and the soil water extracted by vacuum distillation is a mixture of soil moisture and infiltration water, and the soil solution sampler original The soil water collected by bits represents the moisture flowing in the soil, which is the water that can be effectively utilized in the soil.
【作者单位】： 南京工程学院环境工程学院;河海大学水文水资源与水利工程科学国家重点试验室;
【基金】：南京工程学院引进人才科研启动基金(YKJ201327)
【分类号】：S152.7
本文编号：2129742
[Abstract]:In order to study the effect of different sampling methods on the ratio of hydrogen and oxygen stable isotopes in soil water, a simulated experiment was designed to collect water from the bottom of the soil column. Soil solution sampler was used to collect soil water at 10cm, 40cm, 70cm and 100cm in situ. Soil samples were collected at the same level and vacuum distillation was used to extract soil water. Through the comparative analysis of hydrogen and oxygen stable isotope ratio of the samples, it is found that the soil particles first adsorb light isotopes in the process of precipitation infiltration and dry soil, the first collected moisture has the most positive hydrogen oxygen stable isotope ratio, and the soil water extracted by vacuum distillation is a mixture of soil moisture and infiltration water, and the soil solution sampler original The soil water collected by bits represents the moisture flowing in the soil, which is the water that can be effectively utilized in the soil.
【作者单位】： 南京工程学院环境工程学院;河海大学水文水资源与水利工程科学国家重点试验室;
【基金】：南京工程学院引进人才科研启动基金(YKJ201327)
【分类号】：S152.7
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