The groundwater characteristics in two areas, Tushan town (TS) in Laizhou County and Puzhuang town (PZ) in Changyi County, were compared to discuss the dynamics of fluorine enrichment. Groundwater has average fluorine levels of 2.33 mg/L in PZ town ranging from 0.65 to 9.87 mg/L and of 0.91 mg/L ranging from 0.27 to 1.25 mg/L in TS town. The geochemical indexes indicate seawater intrusion in the both areas, the more serious seawater intrusion in PZ town causes the higher pH, electrical conductivity (EC), total dissolved solids (TDS), HCO3− and Na+ than TS town, which can accelerate fluorine leach ability from rock/soil and result in higher fluorine than in TS town. So, the seawater intrusion is related to groundwater fluorine levels. Moreover, the groundwater shows the contrary process of cation exchange. That is, the exchange of Na+ to Ca2+ in TS town occurs and that of Ca2+ to Na+ occurs in PZ town during seawater intrusion. As a result, PZ town has relatively higher Na+ and lower Ca2+ than TS town, and the groundwater types transform from Ca-Cl type in TS town to Na-Cl type in PZ town with the ongoing seawater intrusion. Such a process decreases fluorine solubility in groundwater and contributes to lower fluorine levels in TS town. Therefore, the seawater intrusion and the special cation exchange explain well the different fluorine levels in the two areas, which should be considered when the fluorine enrichment is discussed in coastal regions.
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Research Article|
December 02 2014
Comparative analysis of groundwater fluorine levels and other characteristics in two areas of Laizhou Bay and its explanation on fluorine enrichment Available to Purchase
L. F. Wang;
L. F. Wang
1MOE Key Laboratory of Metallogenic Prediction of Nonferrous Metals, School of Geosciences and Info-Physics, Central South University, Changsha 410083, China
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Q. Chen;
2Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, College of Earth Sciences and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
E-mail: [email protected]
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X. P. Long;
X. P. Long
3State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
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X. B. Wu;
X. B. Wu
1MOE Key Laboratory of Metallogenic Prediction of Nonferrous Metals, School of Geosciences and Info-Physics, Central South University, Changsha 410083, China
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L. Sun
L. Sun
2Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, College of Earth Sciences and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
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Water Supply (2015) 15 (2): 384–394.
Article history
Received:
June 05 2014
Accepted:
November 18 2014
Citation
L. F. Wang, Q. Chen, X. P. Long, X. B. Wu, L. Sun; Comparative analysis of groundwater fluorine levels and other characteristics in two areas of Laizhou Bay and its explanation on fluorine enrichment. Water Supply 1 April 2015; 15 (2): 384–394. doi: https://doi.org/10.2166/ws.2014.124
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