Ionic composition of late Pleistocene ice wedges (IW-17 and IW-20) of the Batagay yedoma, Verkhoyansk District of Yakutia

The subject of the study is the ionic composition of syngenetic Late Pleistocene ice wedges: IW-17 and IW-20, located in Batagay yedoma. Both ice wedges consist of ultra-fresh ice with concentrations of major ions from 20 to 40 mg/l. For samples from ice, a method was used to measure the mass concentration of Ca2+, Mg2+, Na+, K+, NH4+ cations in samples of drinking, mineral, natural and waste water by ion chromatography FR.1.31.2005.01738. The range of detectable concentrations is 0.10-20.00 mg/l, and for the determination of anions, the method of measuring the mass concentration of Cl-, SO4-, NO3- in samples of drinking, mineral, natural and wastewater by ion chromatography FR.1.31.2005.01724 was used. The range of detectable concentrations is 0.10-20.00 mg/l and the method of measuring the mass concentration of ions in samples of natural, drinking and wastewater by ion chromatography HDPE F 14.1:2:4. 132-98 was used, the range of detectable concentrations for cations is 0.10-150.00 mg/l. Measuring instruments: ion chromatographic system Stayer, detection limit for chloride ion 0.02 mg/l. The main results of the conducted research are, as follows: Sodium and calcium soluble cations significantly predominate in the ionic composition of IW-17, reaching 24.15 and 53.16 mg/l, respectively, in the one sample. In the same sample, chlorine anions reach 34.51 mg/l. The average concentration of sulfate soluble anions is 2-3 mg/l. Sodium and calcium cations significantly predominate in the ionic composition of IW-20, reaching 7.27 and 50.0 mg/l, respectively, in one sample. In the same sample, chlorine anions reach 13.72 mg/l. The average concentration of sulfate anions is 2-4 mg/l, reaching 22.24 mg/l. The content of calcium soluble cations is 6-20 mg/l (calcium soluble cations rarely reaching 42-53 mg/l), the concentration of potassium cations is 0.7-3 mg/l. Sodium and calcium cations significantly predominate in the ionic composition of IW-20, reaching 7.27 and 50.0 mg/l, respectively, in one sample. In the same sample, chlorine anions reach 13.72 mg/l. The average concentration of sulfate anions is 2-4 mg/l, reaching 22.24 mg/l. The content of calcium soluble cations is 6-20 mg/l (rarely reach 42-53 mg/l), the concentration of potassium cations is 0.7-3 mg/l. […]

本研究的研究对象为坐落于巴塔盖冻胀丘（Batagay yedoma）中的同生晚更新世冰楔IW-17与IW-20。两块冰楔均由超淡水冰构成，主要离子总浓度介于20~40 mg/L之间。针对冰样检测，本研究采用离子色谱法FR.1.31.2005.01738，测定饮用水、矿泉水、天然水及废水中Ca²+、Mg²+、Na+、K+、NH4+阳离子的质量浓度，该方法的可检出浓度范围为0.10~20.00 mg/L。针对阴离子的测定，本研究采用离子色谱法FR.1.31.2005.01724，测定Cl-、SO4²-、NO3-的质量浓度，可检出浓度范围同样为0.10~20.00 mg/L；此外还采用离子色谱法HDPE F 14.1:2:4.132-98，用于天然水、饮用水及废水中离子质量浓度的测定，该方法的阳离子可检出浓度范围为0.10~150.00 mg/L。本研究使用的测量仪器为Stayer离子色谱系统，氯离子的检出限为0.02 mg/L。本研究的主要结果如下：IW-17的离子组成中，可溶性钠、钙阳离子占显著优势，单一样本中二者浓度分别达24.15 mg/L与53.16 mg/L；该样本中氯离子浓度达34.51 mg/L，可溶性硫酸根阴离子的平均浓度为2~3 mg/L。IW-20的离子组成中，可溶性钠、钙阳离子同样占显著优势，单一样本中二者浓度分别为7.27 mg/L与50.0 mg/L；该样本中氯离子浓度达13.72 mg/L，可溶性硫酸根阴离子的平均浓度为2~4 mg/L，最高可达22.24 mg/L。可溶性钙阳离子含量为6~20 mg/L（极少数可达42~53 mg/L），钾阳离子浓度为0.7~3 mg/L。……