The distribution of trace elements in different grain-size fractions inferred from road surface soils in Harbin City, Heilongjiang Province

Abstract：The samples of urban road surface soils were collected from Harbin City of Heilongjiang Province and divided into different grain size fractions (bulk sample, >63μm, 63-30μm, 30-11μm and <11μm). These samples were analyzed to obtain the composition of trace elements and rare earth elements (REE). The results indicate that the variation degree of trace elements in different size fractions increases in order of Sr

Keywords:
• different size fraction, 
• geochemistry, 
• trace elements, 
• rare earth element (REE), 
• granularity effect