Monitoring of Total Pb, As, Cd, Se, and Cr as Trace Pollutants in Sewage Sludge of Riyadh Second Industrial City by ICP-MS PDF

Keywords

Sewage sludge, Riyadh, industrial city, pollutants, monitoring, ICP_MS, deviation range

Abstract

The concentration levels of Pb, As, Cd, Se, and Cr in sewage sludge of the Riyadh second industrial city environment were monitored using ICP-MS. Samples were collected from five different reservoirs three times a day for a period of four weeks during the summer season. The microwave acid digestion method was developed for sample preparation. Sample reference material was analysed ten times to determine the precision and accuracy of the method. Better results were obtained using external standard calibration with the addition of Yttrium (Y) as an internal standard. Relative standard deviation ranged between 1- 10% for all elements, with percentage recovery values ranging between 99% - 106%. The concentrations of the elements obtained with the proposed method were in good agreement with the given certified values