Water Science and Engineering 2010, 3(3) 282-291 DOI:   10.3882/j.issn.1674-2370.2010.03.004  ISSN: 1674-2370 CN: 32-1785/TV

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water-rock reaction
Pengyang County
LI Pei-Ru
WU Jian-Hua
Article by Li,P.R
Article by Qian,h
Article by Wu,J.H
Article by Ding,j

Geochemical modeling of groundwater in southern plain area of Pengyang County, Ningxia, China

Pei-yue LI1, Hui QIAN1, Jian-hua WU1, Jia DING1

1. School of Environmental Science and Engineering, Chang’an University, Xi’an 710054, P. R. China


The purpose of the paper is to study the evolution mechanism of hydrochemical field and to promote unpredictable benefits to the living standards of local people and to the local economy in the southern plain area of Pengyang County, Ningxia, China. Based on the understanding of the hydrogeological conditions in Pengyang County, the chemical evolution characters of groundwater in the plain area were analyzed. PHREEQC geochemical modeling software was used to perform a hydrochemical modeling for water-rock interaction and to analyze quantitatively the evolution processes and the forming mechanism of the local groundwater. Geochemical modeling results showed that along path ①, Na+ adsorption played the leading role in the precipitation process and its amount was the largest, up to 6.08 mmol/L, cation exchange was obvious on path ①, while on simulated path ② albite took up the largest amount of dissolution, reaching 9.06 mmol/L, the cation exchange was not obvious along path ②. Some conclusions were summarized according to the modeling results that along the groundwater flow path, calcite and dolomite in the whole simulation showed oversaturated status with a precipitation trend, while the fluorite and gypsum throughout the simulated path were not saturated and showed a dissolution trend. Total dissolved solids (TDS) increased and water quality become worse along the flow path. Dissolution reactions of albite, CO2 and halite, exchange adsorption reaction of Na+ as well as precipitation action of sodium montmorillonite and calcite are the primary hydrogeochemical reactions which resulted in changes of hydrochemical ingredients.

Keywords hydrogeochemistry   water-rock reaction   modeling   groundwater   Pengyang County  
Received 2010-03-01 Revised 2010-08-06 Online: 2010-09-27 
DOI: 10.3882/j.issn.1674-2370.2010.03.004

SRF for ROCS, SEM;Ningxia Land and Resources Office “Research of drinking water environment and endemic in new socialist countryside, villages and small towns;SRF for ROCS, SEM

Corresponding Authors: Pei-yue Li
Email: lipy2@163.com
About author:


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