We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Major ion geochemistry of the Nansihu Lake basin rivers, North China: chemical weathering and anthropogenic load under intensive industrialization.
- Authors
Li, Jun; Yuan, Guo-Li; Deng, Xian-Rui; Jing, Xiu-Ming; Sun, Tian-He; Lang, Xin-Xin; Wang, Gen-Hou
- Abstract
To explore the chemical weathering processes and the anthropogenic disturbance of weathering, 20 water samples were collected from the tributaries in the Nansihu Lake basin, a growing industrial area. The major ions in river waters were analyzed to identify and quantify the contributions of the different reservoirs. Based on stoichiometric analyses and end-member determination, the contributions of individual reservoirs were calculated for each tributary. In the study region, the averaged contributions of atmospheric inputs, anthropogenic inputs, evaporite weathering, carbonate weathering and silicate weathering were 2, 37, 28, 25 and 8 %, respectively. Combined with information regarding runoff and drainage area, the annual average contribution of TDS to waters was estimated to be 1.90 ± 0.95 ton/km from silicate weathering, 5.68 ± 2.84 ton/km from carbonate weathering. Furthermore, the associated consumption of CO was calculated to be approximately 7.50 × 10 mol/a. The industrial and mining activities were the main sources for anthropogenic inputs, and they produced non-CO acids (NCA). Of all protons involved in chemical weathering, 34 % was presumed to be originated from NCA, causing 2.74 × 10 mol/a of CO degassing. Moreover, industrial inputs could play a major role in the modification of the chemicals in the water system, and they could even change the carbonate weathering rate in such an intensively industrializing region. In North China, the chemical weathering associated with NCA was found to be significant for the first time.
- Subjects
CHEMICAL weathering; STOICHIOMETRY; INDUSTRIAL management; GEOCHEMISTRY; MINES &; mineral resources
- Publication
Environmental Earth Sciences, 2016, Vol 75, Issue 6, p1
- ISSN
1866-6280
- Publication type
Article
- DOI
10.1007/s12665-016-5305-2