Inicio  /  Water  /  Vol: 8 Núm: 12 Par: 0 (2016)  /  Artículo
ARTÍCULO
TITULO

Distribution and Potential Health Risks of Arsenic, Selenium, and Fluorine in Natural Waters in Tibet, China

Yuan Tian    
Chengqun Yu    
Xinjie Zha    
Jianshang Wu    
Xing Gao    
Chujian Feng    
Kunli Luo    

Resumen

The contents of major and trace elements were analyzed in 204 different types of water samples in 138 villages across 51 counties and cities of Tibet. The average concentrations of arsenic (As), selenium, and fluorine for each water category decreased in the following order: arsenic (in µg/L: hot spring 241.37 > lake 27.46 > stream 22.11 > shallow well 11.57 > deep well 6.22), selenium (in µg/L: deep well 0.85 > shallow well 0.68 > stream 0.62 > hot spring 0.39 > lake 0.36), and fluorine (in mg/L: hot spring 2.10 > lake 1.06 > deep well 0.45 > stream 0.20 > shallow well 0.15). The distribution of arsenic in Tibetan waters ranged between 77.35 µg/L in Ali prefecture and 1.17 µg/L in Chamdo prefecture, with intermediate values of 4.39, 2.52, 2.10, 1.68, and 1.51 µg/L in the prefectures of Shigatse, Nagchu, Lhasa, Lhoka, and Nyingchi, respectively. Carbonatite is a major source of elements in these waters. The non-carcinogenic risk in Tibet caused by heavy metals in drinking water is low overall, except in Ali prefecture?s surface and shallow ground waters, which contain high levels of As. Thus, deep well water in Tibet is safe to drink.

 Artículos similares

       
 
Bingbin Feng, Yancheng Tao, Xiansheng Xie, Yingying Qin, Baoqing Hu, Renming Jia, Lianghao Pan, Wenai Liu and Weiguo Jiang    
Mangrove forests are significant blue carbon pools on the Earth with strong carbon sequestration capacity and play an important role in combating climate change. To improve the capacity of regional carbon sinks, China has implemented a Special Action Pla... ver más

 
Ozren Grozdanic, Ana-Marija Cindric, Iva Finderle and Dario Omanovic    
In this study, we examined for the first time the spatio-temporal distribution of trace metal (TM) contaminants (Zn, Cd, Pb, Cu, Ni and Co) in the seawater column of Pula Bay. The bay has been known for decades as one of the most industrialized regions o... ver más

 
Xinyue Yan, Xin Chen, Wenyan Zheng, Guilin Zhang and Aiguo Dong    
Fifty-one surface sediment samples from Dongshan Bay, China, were analyzed for heavy metals to evaluate their distribution, pollution status, and controlling factors. The enrichment factor is suggestive of the potential pollution status, ranging from min... ver más
Revista: Water

 
Sooyoun Nam, Kidae Kim, Sujin Jang, Jaeuk Lee, Shinwoo Gi, Minseok Kim, Jin Kwan Kim and Sukwoo Kim    
Identifying potential sources of suspended sediment (SS) in headwater catchments is crucial for water quality management. To differentiate these potential SS sources, we investigated the distribution of two fallout radionuclides (FRNs), 137Cs and 210Pbex... ver más
Revista: Water

 
Ze Liu, Jingzhao Zhou, Xiaoyang Yang, Zechuan Zhao and Yang Lv    
Water resource modeling is an important means of studying the distribution, change, utilization, and management of water resources. By establishing various models, water resources can be quantitatively described and predicted, providing a scientific basi... ver más
Revista: Water