SHEWei-qiang,HUOZhao-cui,LIFang,et al.Application of New Functional Materials for Determination of Trace Antimony in Water Samples[J].China Water & Wastewater,2023,39(8):149-154.
Application of New Functional Materials for Determination of Trace Antimony in Water Samples
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第8期
Page:
149-154
Column:
Date of publication:
2023-04-17
- Keywords:
- functional materials; flame atomic absorption spectrophotometer; enrichment and concentration
- Abstract:
- To accurately determine trace antimony (Sb) in environmental water, the ester synthesized by polyvinyl alcohol and thioglycolic acid by flocculation of ferrous sulfate heptahydrate were used to prepare functional materials to enrich and detect trace antimony in environmental water in combination with flame atomic absorption spectrophotometer. The optimal pH value for functional materials to adsorb Sb was 6. The adsorption process conformed to the Langmuir equation and quasi second-order kinetic equation. The adsorption process was dominated by monolayer adsorption and chemical adsorption, and the maximum adsorption capacity was 232.56 μg/mg. The solid-phase extraction column was filled with 0.02 g functional material to enrich Sb solution (volume of 25 mL and concentration of 5 μg/mL) at the flow rate of 1.04 mL/min, and 10% phosphoric acid (elution agent) was used to elute Sb at the flow rate of 1.25 mL/min. After 12 parallel experiments, the RSD of Sb removal efficiency in the solid-phase extraction column was 1.78%. The RSD of elution rate was 4.62%, the RSD of recovery rate was 4.23%, and the average recovery rate was 97.42%. The actual water samples were pretreated and then concentrated by solid?phase extraction column filled with functional materials. The concentration of Sb was 0.86 μg/L.
Last Update:
2023-04-17