Fast screening of metal contaminated soil using a x-ray fluorescence method

• Main Authors: Guo-wei Zeng, 曾國威
• Other Authors: Jie-Chung Lou
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/60019246099218630539

碩士 === 國立中山大學 === 環境工程研究所 === 98 === The purpose of this research is to develop a rapid determination method for heavy metals in soil. Using X-ray fluorescence to obtain soil metals decision limit (CCα) and detection capability (CCβ), to establish the scope of soil metal concentration selection. Then aqua regia digestion digestion and ICP-OES analysis of Pb, Cd, Zn, Ni, Cr, Cu area to check the accuracy of screening. Operating conditions; First, the soil standard samples for the Establishment and assessment of the applicability of the standard. Finally,using of the soil near the control standard establish methods and explore ways to establish the applicability and potential impact. I hope this research can provide a fast, accurate, and sensitivity of soil heavy metal screening, to achieve savings of cost. The results show that the standard reference soil Cu: screening rate was 79.7%, sensitivity was 43.6% and an specificity of 87.7%; reference standard soil Pb: screening rate was 91.5%, a sensitivity of 8.3% specificity 91.5%;reference standard soil Cr:screening rate was 100%, sensitivity was 0%, 100% specificity; reference standard soil Ni: screening rate was 96.1%, sensitivity was 0%, specificity 92.4%; reference standard soil Zn: screening rate was 82.4%, sensitivity was 69.2%, specificity 87.1%; reaching control values of soil Cu: screening rate was 83.0%, sensitivity was 30.8%, specificity of 84.3%. Screening rate and specificity with 80%, the sensitivity poor areas, water was the major disturbance factor.