CAJ | 학술논문

为探索铜冶炼厂周边农田区大气重金属沉降的时空变异特征，以冶炼厂为中心，四周等距离均匀分设8个监测点，于2012年5月至2013年4月，根据酸沉降检测技术规范，采收大气干湿沉降混合样品，利用原子吸收分光光度法分析样品中Cu、Cd、Pb、Zn、Cr含量，计算各监测点所代表区域各类重金属沉降通量。结果显示，研究区重金属Cu、Cd、Pb、Zn、Cr的年沉降通量分别为638、6.56、70.0、225、22.7 mg·m-2·a-1。五种重金属沉降量具有一定的时间变化特征，其中Cd、Zn和Cr的月际间变化显著（P﹤0.05，n＝96）， Pb、Zn、Cr季节间变化显著（P﹤0.05，n＝32），而Cu无显著的月间或季间变化。空间上，Cu、Cd、Pb年沉降通量有极显著性差异（P﹤0.01，n＝8），以铜冶炼厂西南方向的九牛岗监测点最高，而Zn和Cr则无显著性差异。
위탐색동야련엄주변농전구대기중금속침강적시공변이특정，이야련엄위중심，사주등거리균균분설8개감측점，우2012년5월지2013년4월，근거산침강검측기술규범，채수대기간습침강혼합양품，이용원자흡수분광광도법분석양품중Cu、Cd、Pb、Zn、Cr함량，계산각감측점소대표구역각류중금속침강통량。결과현시，연구구중금속Cu、Cd、Pb、Zn、Cr적년침강통량분별위638、6.56、70.0、225、22.7 mg·m-2·a-1。오충중금속침강량구유일정적시간변화특정，기중Cd、Zn화Cr적월제간변화현저（P﹤0.05，n＝96）， Pb、Zn、Cr계절간변화현저（P﹤0.05，n＝32），이Cu무현저적월간혹계간변화。공간상，Cu、Cd、Pb년침강통량유겁현저성차이（P﹤0.01，n＝8），이동야련엄서남방향적구우강감측점최고，이Zn화Cr칙무현저성차이。
Atmospheric deposition is one of transport approaches of heavy metals. Farmland is facing heavy metal pollution from the sur-rounding industries. In this study, we selected a typical farmland area to explore the spatial-temporal variation characteristics of heavy metal deposition around a copper smelter. Between May, 2012 to April, 2013, atmospheric deposition samples(dry and wet)were collected month-ly at 8 monitoring sites. The annual deposition fluxes of heavy metals were 638.0 mg·m-2·a-1, 6.56 mg·m-2·a-1, 70.0 mg·m-2·a-1, 225.0 mg· m-2·a-1, and 22.7 mg·m-2·a-1 for Cu, Cd, Pb, Zn and Cr, respectively. These heavy metals showed temporal variations. Zinc and Cr deposi-tions had significant monthly and seasonal variations(P﹤0.05), but Cd showed significant monthly variation only(P﹤0.05, n=96), and Pb seasonal differences only(P﹤0.05, n=32). However, no significant monthly or seasonal variations were found for Cu deposition. The annual deposition fluxes of Cu, Cd and Pb had markedly difference between monitoring sites(P﹤0.01, n=8), but not for Zn and Cr(P﹥0.05, n=8).