CAJ | 학술논문

为揭示银川平原及周边地区表层土壤中多环芳烃分布特征，分析了银川平原及周边地区37个表层土壤样品中16种美国环保署优先控制多环芳烃的含量与组成特征。结果表明，研究区域内表层土壤中多环芳烃含量为17.2~1199.3 ng·g-1（干重）之间，算数均值为190.6依232.2 ng·g-1，几何均值为125.9 ng·g-1，与国内外相关研究相比处于较低水平。多环芳烃以三环和二环为主要组分，荧蒽与菲为主要污染物，主要来源为区域内的燃烧源排放。多环芳烃在研究区域内呈南北高、东西低的分布态势，人类生产、生活排放和土壤中有机质对多环芳烃的吸附性是影响其空间分布的重要因素。耕地中多环芳烃含量高于草地与荒地，接近我国东部地区耕地，且受土壤总有机碳影响，高环组分所占丰度高于草地和荒地。
위게시은천평원급주변지구표층토양중다배방경분포특정，분석료은천평원급주변지구37개표층토양양품중16충미국배보서우선공제다배방경적함량여조성특정。결과표명，연구구역내표층토양중다배방경함량위17.2~1199.3 ng·g-1（간중）지간，산수균치위190.6의232.2 ng·g-1，궤하균치위125.9 ng·g-1，여국내외상관연구상비처우교저수평。다배방경이삼배화이배위주요조분，형은여비위주요오염물，주요래원위구역내적연소원배방。다배방경재연구구역내정남북고、동서저적분포태세，인류생산、생활배방화토양중유궤질대다배방경적흡부성시영향기공간분포적중요인소。경지중다배방경함량고우초지여황지，접근아국동부지구경지，차수토양총유궤탄영향，고배조분소점봉도고우초지화황지。
The emissions of polycyclic aromatic hydrocarbons(PAHs)can result in contamination of soils and agricultural products. In this study, 37 surface soil samples were collected from Yinchuan Plain and the surrounding areas. Sixteen US EPA priority pollutant PAHs were measured individually to address their geographical distribution pattern in soils. The total concentrations of the 16 PAHs varied from 17.2 to 1 199.3 ng·g-1 with arithmetic and geometrical means of 190.6±232.2 ng·g-1 and 125.9 ng·g-1, respectively, which were generally lower than those reported for other areas. The dominant PAHs were two or three ring compounds, typically anthracene and phenanthrene. The isomer based source apportionment suggested that the PAHs were primarily originated from combustion. Uneven spatial distribution was observed with relatively high concentrations found in the north and south areas and relatively low in the east and west ones. The spatial distribution pattern of PAHs was associated with that of emission sources and soil total organic carbon(TOC). The concentrations of PAHs in crop-land soils were much higher than those in grassland and sparsely-vegetated land soils, likely due to high TOC contents in the cropland soils.