Moscow University Soil Science Bulletin Pub Date : 2020-10-01 , DOI: 10.3103/s0147687420030072 Yu. N. Vodyanitskii , N. A. Avetov , A. T. Savichev , S. Ya. Trofimov , E. A. Shishkonakova
Abstract
A laboratory study of the solid phase of saline peats by X-ray fluorescence (XRF) analysis has revealed the presence of organic halogen compounds. Cl-organic compounds were found in one-third of peat samples; however, their proportion was low: 14–15% of the total chlorine content. In contrast, Br-organic compounds are formed more often and the Brorg proportion is higher (from 12 to 23% of total Br). The relatively weak development of the halogenation of organic matter in the saline peatlands is explained by recovery conditions that prevent the synthesis of organic halogen compounds. An X-ray diffraction analysis (XRD) of the ash of saline peatlands has revealed four main minerals: halite, quartz, calcite, and gypsum. Halite absolutely prevails in low-ash peatlands. The XRD confirms the salinity of peatlands and gives the quantitative content of three minerals: halite, quartz, and calcite. However, analysis of peat ash may involve errors both due to the growth of minerals (gypsum) and due to the incomplete identification of the number of phases in high-ash peat samples. The second type of error can be corrected using data on the chlorine content in peat ash by X-ray fluorescence analysis. In addition to the construction of profiles of salt distribution in solution, it is necessary to determine the amount and composition of organic halogen compounds (some of them have herbicide properties) for characterizing the contamination of peatlands.
中文翻译:
盐碱化泥炭地固相组成的实验室测定:可能性和局限性
摘要
通过X射线荧光(XRF)分析对盐水泥炭固相进行的实验室研究表明,存在有机卤素化合物。在三分之一的泥炭样品中发现了Cl-有机化合物。但是,它们的比例很低:占总氯含量的14-15%。与此相反,形成BR-有机化合物被更频繁和溴的有机比例更高(从总溴的12%到23%)。盐渍泥炭地中有机物卤化的相对较弱的发展可以通过阻止有机卤素化合物合成的回收条件来解释。盐渍泥炭地灰分的X射线衍射分析(XRD)显示了四种主要矿物质:盐,石英,方解石和石膏。在低灰烬的泥炭地中,绝对占主导地位。XRD证实了泥炭地的盐度,并给出了三种矿物的定量含量:盐石,石英和方解石。但是,由于矿物质(石膏)的生长以及由于高灰泥煤样品中相数的识别不完全,泥炭灰的分析可能会涉及误差。第二类错误可以通过X射线荧光分析使用泥炭中氯含量的数据进行校正。