Major hydrogeochemical processes controlling arsenic enrichment in groundwater of the Datong basin, Northern China

Y. Wang, S. L. Shvartsev

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

As concentration and speciation were studied of 146 groundwater samples of the Datong basin, northern China. Itwas shownthatAstot,As(III) andAs(V) are in the range of 0.4-1932, 0.2-1060 and 0.2-872μg/l respectively and the ratio of As(III)/As(V) is 0.36-4.1, with an average of 1.4. High arsenic groundwaters from the Datong basin are mostly soda waters, with TDS between 0.4 and 10.5 g/l and pH between 7.6 and 9.1. Geochemical modeling indicates that the waters are oversaturated with respect to calcite and clay minerals such as kaolinite, and are always undersaturated with respect to primary rock forming minerals such as anorthite and albite. The water chemistry is also affected by continental salinization. Results of our hydrogeochemical studies indicate that the occurrence of sodawater is one natural stage ofwater-aluminosilicates interaction,which happens when the water is saturated with respect to calcite, and under the condition that salt accumulation of evaporative enrichment is not strong or even absent. The soda-forming process creates a favorable geochemical environment for As enrichment in groundwater at Datong.

Original languageEnglish
Title of host publicationWater-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12
Pages1123-1126
Number of pages4
Volume2
Publication statusPublished - 2007
Event12th International Symposium on Water-Rock Interaction, WRI-12 - Kunming, China
Duration: 31 Jul 20074 Aug 2007

Other

Other12th International Symposium on Water-Rock Interaction, WRI-12
CountryChina
CityKunming
Period31.7.074.8.07

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Water Science and Technology

Fingerprint Dive into the research topics of 'Major hydrogeochemical processes controlling arsenic enrichment in groundwater of the Datong basin, Northern China'. Together they form a unique fingerprint.

Cite this