In this study, the atomic spectroscopic methods for determination of some trace elements were established. ICP-AES was used for determination the trace elements Co, Ni, Cu, Cr, etc. For the laboratory research work, all the coal samples were digested with a mixture of acids (HNO3- HF- HCLO4) after burned at 650 C0 for one hour. Based on the establishment of atomic spectroscopic determination methods of trace elements, Tessier sequential speciation and separation methods were used in the study of speciation distribution of some heavy metals in different size of particles released from coal combustion of Qingshan thermoelectric plant. The transition elements in two samples from Qingshan thermoelectric plant (with different combustion condition) were extracted into five fractions by sequential extraction. In each fraction a suitable reagents with an optimum pH and time were used. Different circumstance of combustion results in different distribution of elements. The released metals increase with the decreasing of pH and the concentration of salts of leashing reagents.
展开▼
