scholarly journals Speciation and Determination of Selenium Oxyanions at the Drinking Water Pollution Concentration Levels

Separations ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 27
Author(s):  
Kyriaki Kalaitzidou ◽  
Evangelia Bidiou ◽  
Anastasios Zouboulis ◽  
Manassis Mitrakas
Keyword(s):  
Natural Organic Matter ◽  
Natural Waters ◽  
Major Ions ◽  
Ph Value ◽  
Selective Adsorption ◽  
Polluted Waters ◽  
Relevant Material ◽  
Total Selenium ◽  
Concentration Levels

The research on selenium presence in water resources has revealed the need to determine the respective aquatic species. As selenium oxyanions SeO32− (SeIV) and SeO42− (SeVI) predominate in natural waters, their determination is essential, mainly due to different ecotoxicity properties, as well as to different removal options from relevant-polluted waters. This study focuses on the SeO32−/SeO42− speciation/separation and determination through the selective adsorption of SeO32− only onto specific iron oxy-hydroxides (FeOOHs). For this purpose, the laboratory prepared FeOOHs examined along with the commercially available relevant material (Bayoxide), which was found to present optimum results for the speciation of selenium oxyanions, at the low concentration range 10–100 μg/L, using a dose of 0.5 g/L of adsorbent and gently stirring for 30 min at the usually encountered pH value of 7.3 ± 0.2. Moreover, the relevant experiments showed that the other major ions Cl−, HCO3−, NO3−, SO42−, Ca2+, Mg2+, Na+, possibly found in most natural waters at the concentration range 0–200 mg/L, as well as silicon, total organic carbon (TOC) of natural organic matter (NOM) and iron at the concentration range 0–50 mg/L, 0–5 mg/L and 0–1 mg/L, respectively, did not interfere with the selective adsorption of Se(IV). Furthermore, the most important advantage of this selective speciation method is its implementation/combination with all commonly applied analytical methods for the determination of total selenium.

Determination of molybdenum in natural waters after selective adsorption on sephadex gel

1982 ◽  
Vol 142 ◽  
pp. 101-107 ◽  
Author(s):  
Kazuhisa Yoshimura ◽  
Soichi Hiraoka ◽  
Toshikazu Tarutani
Keyword(s):  
Natural Waters ◽  
Selective Adsorption

scholarly journals Separation and determination of dimethylarsenate in natural waters

2012 ◽  
Vol 77 (6) ◽  
pp. 775-788 ◽  
Author(s):  
Issa Ben ◽  
Aleksandar Marinkovic ◽  
Ljubinka Rajakovic
Keyword(s):  
Natural Waters ◽  
Ph Value ◽  
Fixed Bed ◽  
Inorganic Arsenic ◽  
Standard Addition ◽  
Arsenic Species ◽  
Arsenic Adsorption ◽  
Strong Base ◽  
Relative Standard

A simple and efficient method for separation and determination of dimethylarsenate DMAs(V) was developed in this work. Two resins, a strong base anion exchange (SBAE) resin and iron-oxide coated hybrid (HY) resin were tested. By simple adjusting pH value of water at 7.00, DMAs(V) passed through the HY column without any changes, while all other arsenic species [inorganic arsenic and monomethylarsonate, MMAs(V)] were quantitatively bonded on HY resin. The resin capacity was calculated according to the breakthrough points in a fixed bed flow system. At pH 7.00 the HY resins bonded more than 4150 ?g g-1 of As(III), 3500 ?g g-1 of As(V) and 1500 ?g g1 of MMAs(V). Arsenic adsorption behavior in the presence of impurities showed tolerance with the respect to potential interference of anions commonly found in natural water. DMAs(V) was determined in the effluent by ICP-MS. The detection limit was 0.03 ?g L?1 and relative standard deviation (RSD) was between 1.1?7.5 %. Proposed method was established performing standard procedures: with external standard, certified reference material and the standard addition method.

The Determination of Trace Elements in Natural Waters Using the Stabilized Temperature Platform Furnace

1983 ◽  
Vol 37 (1) ◽  
pp. 1-11 ◽  
Author(s):  
D. C. Manning ◽  
W. Slavin
Keyword(s):  
Trace Elements ◽  
Natural Water ◽  
Natural Waters ◽  
Detection Limits ◽  
Clean Room ◽  
Concentration Levels ◽  
Recovery Experiment

We have developed procedures to determine 12 trace elements, Al, As, Be, Cd, Co, Cr, Cu, Mn, Ni, Pb, Se, and V, in natural water using the stabilized temperature platform furnace. Suitable matrix modifiers were tested. Confirmation of the techniques was obtained by recovery experiments at four different concentration levels. Only simple aqueous standards were required and the method of additions was not used. A simple recovery experiment was satisfactory confirmation of freedom from chemical interferences. The detection limits in the natural waters were less than 1 μg/liter, closer to 0.1 μg/liter for most of the elements. The precision was 10 to 15%. The work did not require clean-room facilities.

Spectrophotometric determination of vanadium in natural waters and rocks after selective adsorption on sephadex gel

1981 ◽  
Vol 130 (2) ◽  
pp. 345-352 ◽  
Author(s):  
Kazuhisa Yoshimura ◽  
Hiroyuki Kaji ◽  
Eishi Yamaguchi ◽  
Toshikazu Tarutani
Keyword(s):  
Spectrophotometric Determination ◽  
Natural Waters ◽  
Selective Adsorption

scholarly journals Analysis of Interlaboratory Performance in the Determination of Total Selenium in Water

1999 ◽  
Vol 82 (6) ◽  
pp. 1466-1473 ◽  
Author(s):  
Peter J Steinhoff ◽  
Brain W Smith ◽  
Dewey W Warner ◽  
Gregory Möller
Keyword(s):  
Reference Material ◽  
Analytical Methods ◽  
Natural Waters ◽  
Hydride Generation ◽  
Sample Introduction ◽  
Superior Performance ◽  
Statistical Uncertainty ◽  
Interlaboratory Variability ◽  
Total Selenium

Abstract This study explored the performance of experienced laboratories in the analysis for total selenium in water by a variety of analytical methods. The goal of the study was to examine intra- and interlaboratory variability. Replicates (n = 7) of 7 sample types that included a reference material of known Se concentration, natural waters, and treated wastewaters were submitted to 7 laboratories with prequalified Se analytical experience. Results of the study indicated wide ranges in minimum and maximum results, distinct differences in laboratory precision, and routine reporting of numerical results below statistical limits of quantitation. Hydride generation as a sample introduction technique demonstrated superior performance. In general, the study supports a caution advisory about using low-level Se data, especially results lower than about 10 µg Se/L, without quantitating the statistical uncertainty of the data. Because this study used data from samples that were submitted in bulk to participating laboratories prequalified for Se analytical expertise and experience, it can be considered a best-case demonstration of performance.

Sign in / Sign up

Export Citation Format

Share Document