日本遗弃化学武器销毁残渣中元素分析及砷形态分析

A Study on Speciation Analysis of Arsenic in Residues of Japanese Abandoned Chemical Weapons

采用X射线荧光光谱法对日本遗弃在华化学武器销毁残渣元素分布进行了分析,同时用土壤连续提取法对残渣样品的砷形态进行了提取。结果表明,黄剂及红剂销毁残渣样品中主要元素均为铁、铜、砷、钛、铅等,其中砷元素占比大且危害最深。进一步对样品进行分析结果显示,残渣中砷形态主要为Fe-结合态、Ca-结合态、残渣态等。分析结果对销毁残渣的二次处理提供了必要的技术支撑,在敦促日方改进销毁技术方面具有重要的现实意义。

In this paper,X-ray fluorescence(XRF)technique was used to analyze the distribution of elements in the residues of chemical weapons abandoned by Japan in China.The speciation of arsenic in the residues was determined by soil continuous extraction method.The results showed that the main components of the HD/L residue and the DC/DA residue were iron,copper,arsenic,titanium,plumbum,etc.Among them,the arsenic content was the highest and the arsenic was the worst hazard.Further analysis of the samples showed that the main arsenic speciation in the residue was Fe-bound,Ca-bound,and residuals.The experimental results provided the necessary technical support for the secondary disposal of the destructive residue and had an important practical significance in urging Japan to improve the destructive technology.