SciELO - Scientific Electronic Library Online

 
vol.59 issue1STUDY ON ESSENTIAL OIL COMPOSITION OF THE ROOTS OF CRASSOCEPHALUM CREPIDIOIDES (BENTH.) S. MOOREEFFECT OF VIRGIN HETEROPHASIC PP COPOLYMER CONTENT ON MOISTURE ABSORPTION, THERMAL AND MECHANICAL PROPERTIES OF RECYCLED POLYETHYLENE WOOD FLOUR COMPOSITES author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


Journal of the Chilean Chemical Society

On-line version ISSN 0717-9707

Abstract

COPAJA, SYLVIA. V; NUNEZ S, VESNA  and  VELIZ, DAVID. DETERMINATION OF SOLUBLE SALTS IN INTERSTITIAL WATER OF FLUVIAL SEDIMENTS BY IE-HPLC. J. Chil. Chem. Soc. [online]. 2014, vol.59, n.1, pp.2366-2372. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072014000100026.

An ionic exchange high resolution liquid chromatography (IE-HPLC) method for determination of cations and anions in interstitial water of sediments, affluent and effluent of dams is proposed in this paper. Cations: Na+, Ca2+, K+, and Mg2+ and anions: Cl-, CO32-, NO3- and SO42- were analyzing by IE-HPLC method. Optimized analytical conditions were validated in terms of accuracy, recovery and detection limit. The method of flame spray atomic absorption spectrophotometer (AAS) was used as an additional method for the determination of Ca and Mg. It must be indicated that cations may be analyzed by several analytical methods such as AAS, ICP, etc., but there are not enough methods to analyze anions; IE-HPLC methods are good alternative to determine these ions. The aim of this study was to determine ions in interstitial water in the affluent and effluent of the Chilean dams Cogotí, Corrales, La Paloma, Rapel and Recoleta in order to determine if the water is suitable for irrigation or human consumption and estimate the effect of dams on water quality. The results indicate that the highest concentrations observed were for the cations: Ca2+ (mean 43.5 mgL-1), Na+ (mean 16.4 mgL-1), Mg2+ (mean 12.6 mgL-1), and K+ (mean 2.3 mgL-1). The highest concentration of anions was found for CO32- (mean 55.9 mgL-1); the concentrations of SO42-, Cl- and NO3- reached 59.3 mgL-1, 12.8 mgL-1 and 27.0 mgL-1, respectively. The results indicate that although the origin of soluble salts is lithogenic, the high concentrations of these salts found in some places indicate anthropogenic effect, either by direct or indirect discharges or by diffuse pollution. These high concentrations may be significant, considering that these waters are used mainly for irrigation, which would affect the quality of agricultural soils irrigated with this moderately saline water.

Keywords : Fluvial sediments; IE-HPLC (high-resolution ion exchange liquid chromatography); dams; soluble salts.

        · text in English     · English ( pdf )