摘要
2014年7月对淮北煤田主要河流及地下水系统采集20个水样,测试了水样中常规水化学及氢氧同位素含量,利用多元统计及传统图示方法探讨了水化学类型及水化学过程,并对水样适用性进行评价。结果表明,水样整体呈弱碱性,水样中TDS含量偏高,阳离子以Na++K+为主,阴离子以SO2-4和HCO-3为主,水化学类型主要为Na-SO4和Na-HCO_3型;水样具有较好的灌溉适用性,但处理前不宜直接饮用;水样δD在-53.07‰^-22.07‰之间变化,平均值为-38.30‰,δ18O在-6.97‰^-1.23‰之间变化,平均值为-4.09‰,受到了明显的蒸发作用影响,δD和δ18O关系方程为δD=5.21δ18O-16.90,可作为区域蒸发线的参考;Gibbs和主成分分析显示水样中元素含量特征主要受到岩石风化和蒸发作用的影响。
Twenty water samples were collected in Huaibei coalfield,China in July,2014,and major ions and isotopes of hydrogen and oxygen contents in water samples were tested; Water type,hydrochemistry process and applicability of the water samples were also discussed. Based on multivariate statistical analysis and traditional graphic methods,results show that water samples present weak alkaline,with high TDS concentrations. The water samples are mainly Na-SO4 and Na-HCO3 type,with high concentrations of Na＋＋K＋and SO2-4＋HCO-3in anions and cations,respectively. The water samples are suitable for irrigation,whereas are not suitable for drinking before treatment. The δD and δ18O are varied from-53. 07‰ to-22. 07‰ and-6. 97‰ to-1. 23‰,with average value-38. 30‰ and-4. 09‰,respectively. The formula between δD and δ18O（ δD = 5. 21 δ18O-16. 90） is clear affected by evaporation,what could be as reference for regional evaporation line. Elements contents in water samples were mainly influenced by rock weathering and evaporation,according to the analysis of Gibbs and principal component.
出处
《地球与环境》
CAS
CSCD
2016年第4期414-421,共8页
Earth and Environment
基金
国家自然科学基金项目(41373095)
宿州学院博士科研启动基金项目(2015jb08)
宿州学院博士后研究项目(2015BHB01)
关键词
河流
地球化学
同位素
淮北煤田
river
geochemistry
isotope
Huaibei coalfield
