西藏地区天然水的水化学性质和元素特征（英文）

编号 zgly0001584749

文献类型 期刊论文

文献题名 西藏地区天然水的水化学性质和元素特征（英文）

作者 田原  余成群  雒昆利  查欣洁  武建双  张宪洲  倪润祥 

作者单位 InstituteofGeographicSciencesandNaturalResourcesResearch  CAS  UniversityofChineseAcademyofSciences  Xi’anUniversityofScienceandTechnology 

母体文献 Journal of Geographical Sciences 

年卷期 2015年06期

年份 2015 

分类号 P342 

关键词 elementconcentrations  hydrochemicalspecies  waterchemistry  waterquality  Tibet 

文摘内容 Sixty water samples(35 groundwater samples, 22 surface water samples and three hot-spring water samples) were collected at 36 points from villages and towns in Lhasa city, Nagchu(Nagqu) prefecture, Ali(Ngari) prefecture and Shigatse(Xigaze) prefecture(Tibet) in 2013 to study the hydrochemical characteristics and element contents of natural waters. The concentrations of elements were determined in the water samples and compared with the concentrations in water samples from other regions, such as southeast Qinghai, south Xinjiang, east Sichuan and west Tibet. The hydrochemical species in different areas were also studied. Water in most parts of Tibet reaches the requirements of the Chinese national standard and the World Health Organization international standard. The p H values of the water samples ranged from 6.75 to 8.21 and the value for the mean total dissolved solids was 225.54 mg/L. The concentration of arsenic in water from Ali prefecture exceeded the limit of both the Chinese national standard and the international standard and the concentration of fluoride in water from Shuanghu exceeded the limit of both the Chinese national standard and the international standard. The main hydrochemical species in water of Tibet is Ca(HCO3)2. From south to north, the main cation in water changes from Ca2+ to Na+, whereas the main anions in water change from HCO–3 to Cl– and SO2–4. The chemistry of river water and melt water from ice and snow is dominated by the rocks present at their source, whereas the chemistry of groundwater is affected by many factors. Tectonic divisions determine the concentrations of the main elements in water and also affect the hydrochemical species present.