Mineralization characteristics and formation mechanism of shallow groundwater in Yinchuan Plain
Journal Title: Energy Environmental Protection - Year 2023, Vol 37, Issue 6
Abstract
Based on the hydrochemical data of shallow groundwater in Yinchuan Plain, the total dissolved solids (TDS), pH and main ions were analyzed using statistical methods, Pipe-trigram, Gibbs model, and correlation analysis to study the formation mechanism of the shallow groundwater. The results showed that: (1) The spatial variability of TDS, Cl^-, SO_2^-4 , K^+, Na^+ and Mg^2+ was relatively large, whereas the spatial variability of Ca^2+ and HCO_3^- is relatively small. (2) The degree of mineralization of shallow groundwater could be divided into three stages: the first stage consisted primarily of HCO_3-SO_4 water or HCO_3-Cl water stage with TDS<1 g·L^-1; the second stage was mainly characterized by SO_4-Cl and SO_4-HCO_3 water, with TDS generally ranging from 3 to 6 g·L^-1 and exceeding 6 g·L^-1 in some areas; the third stage was characterized by Cl-SO_4 and Cl-HCO_3 water, with TDS generally ranging from 3 to 10 g·L^-1 and reaching 10 g·L^-1 or higher in some areas. (3) The degree of mineralization of shallow groundwater was primarily controlled by evaporation, concentration, and rock weathering, with additional influence from cation exchange. Regarding the contribution to the degree of mineralization, the water chemical components followed a descending order of Na^+, Cl^-, SO_2^-4 , Mg^2+, Ca^2+, and HCO_3^-1. For TDS<1 g·L-1, the mineralization of shallow groundwater was mainly influenced by the dissolution of rock salt and carbonate. However, after TDS exceeded 3 g·L^-1, the contribution of gypsum and magnesium sulfate dissolution to the mineralization of shallow groundwater increased.
Authors and Affiliations
SUN Yufang|School of Water Resources and Environment,China University of Geosciences Beijing, China, Hydrology & Environmental Geological Survey Institute of Ningxia Hui Autonomous Region, China, MENG Xuchen|Hydrology & Environmental Geological Survey Institute of Ningxia Hui Autonomous Region, China, JIN Xiaomei*|School of Water Resources and Environment,China University of Geosciences Beijing, China, Li Hongbo|Hydrology & Environmental Geological Survey Institute of Ningxia Hui Autonomous Region, China
Keywords
Related Articles
- EP ID EP738054
- DOI 10.20078/j.eep.20231003
- Views 4
- Downloads 0
Effect of reaction temperature on Mo/Al_2O_3 catalytic hydrodeoxygenation of alkali lignin bio-oils
Alkali lignin, an important source of industrial lignin, can be used for producing aromatic components in biofuels while retaining its aromatic ring structure through hydrothermal liquefaction technology. The temperature...
Response surface methodology to optimize the degradation of 17β-estradiol by iron nanoparticles activated peroxydisulfate
17β-estradiol (E2) is a typical endocrine disrupting compounds (EDCs) commonly found in wastewater and surface water, and is considered to cause potential environmental risks. In this paper, response surface methodology...
The coordination complex formed by oxalic acid and chromate and the mechanism for enhanced photoreduction of Cr(Ⅵ) under visible-light irradiation
Oxalic acid, which mainly originates from root exudation and plant residue decomposition, is one of the most widely existiug carboxylic acids, and has a dramatic impact on the reduction of chromate in natural waters. In...
Measurement techniques new progress of atmospheric fine particles
Atmospheric fine particle pollution has an important impact on regional environment, global climate and human health, so it has been one of the key and difficult points of air pollution prevention and control. In recent...
Situation and prospects of treatment technologies for mine water containing ammonia nitrogen
As the discharge standards for mine water treatment become more stringent, the requirements for effective removal of ammonia nitrogen from mine water are strongly needed. While there are several methods available for tre...