Jaradat Qasem M, Massadeh Adnan M, Zaitoun Mohammed A, Maitah Baheyah M
Chemistry Department, Mutah University, Jordan.
Environ Monit Assess. 2006 Jan;112(1-3):197-210. doi: 10.1007/s10661-006-0356-6.
Chemical and physical size fractionation of heavy metals were carried out on 20 soil samples from the scrap yard area. Tessier method was used in sequential extraction. Cadmium showed the highest levels among the other elements studied in the exchangeable fraction (about 33%), while other elements showed low levels in this fraction (> or =1%). Lead and manganese were mostly found in the Fe-Mn oxide fraction, zinc and iron were mostly in residual fraction, while copper was mostly found in the organic fraction of the soil. Soil samples were size-fractionated into four sizes: 1000-500, 500-125, 125-53, and less than 53 microm. The highest levels of Fe, Cu, Pb, Mn, and Cd were found in the medium fraction (500-125 mum), while zinc showed its highest levels in the fine fraction (125-53 microm). The order of heavy metal load in the size fractions was found to be medium > fine > coarse > silt for Fe, Mn, Cu, Pb, and Cd, where it was found as fine > medium > coarse > silt for zinc.
对来自废品场区域的20个土壤样本进行了重金属的化学和物理粒度分级。采用 Tessier 方法进行连续萃取。在所研究的其他元素中，镉在可交换态部分的含量最高（约33%），而其他元素在该部分的含量较低（≥1%）。铅和锰主要存在于铁锰氧化物部分，锌和铁主要存在于残渣部分，而铜主要存在于土壤的有机部分。土壤样本被粒度分级为四种大小：1000 - 500、500 - 125、125 - 53和小于53微米。铁、铜、铅、锰和镉在中等粒度部分（500 - 125微米）含量最高，而锌在细粒度部分（125 - 53微米）含量最高。发现铁、锰、铜、铅和镉在粒度部分的重金属负载顺序为中等粒度＞细粒度＞粗粒度＞粉砂粒级，而锌的顺序为细粒度＞中等粒度＞粗粒度＞粉砂粒级。
