铅锌矿区土壤重金属的EDXRF分析

EDXRF Analysis of Soil Heavy Metals on Lead-Zinc Orefield

铅锌矿区及附近土壤由于受铅锌矿开采和选冶影响,受到普遍污染,Pb和Zn含量高,浓度范围宽。由于谱线重叠,高含量Pb严重干扰As的测定。同时高含量Pb和Zn的土壤标样缺乏。针对以上3个问题,该工作研究探讨了有效解决途径,建立了铅锌矿区土壤重金属Pb,As,Cd,Cu和Zn等的EDXRF分析方法。所建方法的可测量浓度,Pb为4.4~23 600μg.g-1,Zn为7.0~39 400μg.g-1,方法检出限分别为1.1和0.9μg.g-1,平均相对误差分别为7.6%和6.2%。

Due to the impact of lead-zinc mining and smelting, the soil of lead-zinc orefield and nearby areas has been widely pol- luted. Moreover, the concentration of lead and zinc was high, and their concentration range was wide. Furthermore, the impact of overlapping interference between low concentration As and high Pb was serious, and the lack of soil standards of lead and zine was also a problem. According to these problems, the present work studied an effective solution to setting up the EDXRF analysis of Pb, As, Cd, Cu and Zn of soil on lead-zinc orefield. The measurable concentration of Pb was 4. 4-23 600μg · g^-1 , and that of Zn was 7.0-39 400 μg·g^-1. The detection limit was 1.1μg·g^-1 for Pb and 0. 9μg · g^-1 for Zn. The average relative error was 7.6 % for Pb and 6.2 % for Zn.