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首页> 外文期刊>Chemical Science International Journal >Quantification and Speciation of Lead, Cadmium and Chromium in Dandora Dumpsite Soils
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Quantification and Speciation of Lead, Cadmium and Chromium in Dandora Dumpsite Soils

机译：丹参垃圾堆土壤中铅，镉和铬的量化和形态

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Open dumpsites are one of the main sources of heavy metals and as a result, lots of research has been undertaken on the pseudo-total content of heavy metals in dumpsite soils, but little research on the forms in which they exist. The current research was carried out to determine levels of chromium, lead and cadmium in the various fractions of Dandora dumpsite soil and how they are fractionated in the topsoil and subsoil horizons. Samples were obtained from eight sites with depths of (0-30 cm) and (30-60 cm) for topsoil and bottom soils respectively. The modified Community Bureau of Reference (BCR) sequential extraction procedure was used and metal analysis performed using flame atomic absorption spectrophotometry. The metals (lead, chromium and cadmium) total concentration (μg/g) in the upper soil profile ranged from 42.22 to 1096.21, 38.26 to 180.60 and 11.23 to 44.22 while the lower soil profiles were 54.19 to 239.28, 30.56 to 76.48 and 9.47 to 22.56, respectively. The concentration of lead in various fractions of the upper soil profile followed the order; reducible > oxidisable > residual > exchangeable, while that of chromium was residual > oxidisable > reducible > exchangeable. Cadmium followed the order exchangeable > residual > reducible > oxidisable. The percentage of the metals in non-residual fraction were Pb (78%), Cr (58.7%) and Cd (70%). Their mobility factors were (Pb) 39.7 (Cr) 7.75 and (Cd) 5.02 in the upper soil profiles. Thus, the results suggest that Dandora dumpsite is highly polluted with the selected heavy metals.
机译：开放式垃圾场是重金属的主要来源之一，因此，已经对垃圾石土壤的重金属伪总含量进行了大量研究，但对它们存在的形式进行了研究。进行目前的研究，以确定丹麦酒垃圾滴土壤的各种级数中的铬，铅和镉水平以及它们在表土和底土视野中的分馏。将样品从八个位点获得，深度为（0-30cm）和（30-60cm），分别用于表土和底部土壤。使用改进的社区参考局（BCR）序列提取方法，使用火焰原子吸收分光光度法进行金属分析。上层土壤曲线中的金属（铅，铬和镉）总浓度（μg/ g）范围为42.22至1096.21,38.26至180.60和11.23至44.22，而下部土壤剖面为54.19至239.28,30.56至76.48和9.47分别为22.56。上土轮廓的各种部分的铅浓度遵循秩序;可再氧化>氧化>残留>可更换，而铬的可储存>可氧化>可更换。镉遵循订单可交换>残留>可再氧化>氧化。非残留级分中金属的百分比为Pb（78％），Cr（58.7％）和Cd（70％）。它们的迁移率因子是（Pb）39.7（Cr）7.75和（CD）5.02在上部土壤剖面中。因此，结果表明Dandora Dumpsite与所选择的重金属受到高度污染。

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