干旱区生态环境知识资源中心(Arid): Strategies to characterize the geochemical interrelationship between coastal saline groundwater and seawater

Arid

DOI	10.1007/s12665-021-09924-9
	Strategies to characterize the geochemical interrelationship between coastal saline groundwater and seawater
	Sabarathinam, Chidambaram; Bhandary, Harish; Ali, Ameena
通讯作者	Sabarathinam, C (corresponding author), Kuwait Inst Sci Res, Water Res Ctr, Kuwait, Kuwait.
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2021
卷号	80 期号:18
英文摘要	Groundwater contamination by the adjacent seawater has been a global problem. To address the process and evolution of salinity in groundwater, different procedures such as major ion ratios, standard plots, geophysical techniques, isotopic techniques, and modelling methods were adopted. It is difficult to distinguish the groundwaters' with salinity, similar or greater than the seawater by adopting major ions. Saline to hypersaline conditions are reported in coastal groundwater of the arid regions. In order to address the sources of salinity, evolution and geochemical nature, groundwater samples were collected near the shore along with adjacent seawater. The ion-ratio and the Piper diagram did not show a clear demarcation between groundwater and seawater, but the fact that seawater values were within a narrow range than the groundwater. Whereas the Cl/Br and Br/Si ratios, thermodynamic stability plots of K-Silica system, Plagioclase stability and carbonate system with respect to logpCO(2) reflected geochemical variation between the seawater and groundwater samples. Since the silica values of seawater samples were lesser, they proved to be a significant tracer to characterize the non-contaminated groundwater samples. The seawater-groundwater interaction was inferred from the study and probable locations of SGD were identified. The evolution mechanism of the brine composition with the present scenario was studied considering the saturation states of halite, silicates, carbonate and sulfate minerals. It was identified that the evolutionary pathway of brine from groundwater composition is governed by the Ca ion, which is a common ion for most of the carbonate and sulfate minerals. The groundwater chemistry indicates the Cl-SO4 brine evolution pathway leading to the formation of Mg-SO4 brine. Thus, the study proves that ratios of Cl/Br, Br/Si, thermodynamic stability plots with respect to silicate minerals and logpCO(2) along with saturation states of minerals can serve as significant tool to characterize the hypersaline groundwater.
英文关键词	Geochemical characterization Hypersaline groundwater Thermodynamic stability plots
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000696238800005
WOS关键词	WASTE-WATER IRRIGATION ; TAMIL-NADU ; DISCHARGE SGD ; TRACE-METALS ; SHALLOW GROUNDWATER ; PONDICHERRY REGION ; TUTICORIN DISTRICT ; MARINE-ENVIRONMENT ; DISSOLVED SILICA ; MASS-BALANCE
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363109
作者单位	[Sabarathinam, Chidambaram; Bhandary, Harish; Ali, Ameena] Kuwait Inst Sci Res, Water Res Ctr, Kuwait, Kuwait
推荐引用方式 GB/T 7714	Sabarathinam, Chidambaram,Bhandary, Harish,Ali, Ameena. Strategies to characterize the geochemical interrelationship between coastal saline groundwater and seawater[J],2021,80(18).
APA	Sabarathinam, Chidambaram,Bhandary, Harish,&Ali, Ameena.(2021).Strategies to characterize the geochemical interrelationship between coastal saline groundwater and seawater.ENVIRONMENTAL EARTH SCIENCES,80(18).
MLA	Sabarathinam, Chidambaram,et al."Strategies to characterize the geochemical interrelationship between coastal saline groundwater and seawater".ENVIRONMENTAL EARTH SCIENCES 80.18(2021).