Investigation of trace elements in agricultural soils by BCR sequential extraction method and its transfer to wheat plants
Investigation of trace elements in agricultural soils by BCR sequential extraction method and its transfer to wheat plants
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DOI：
10.1007/s10661-010-1513-5
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发表时间：
2011-04-01
影响因子：
3
通讯作者：
Ibar, Hilmi
中科院分区：
文献类型：
--
作者：
Bakircioglu, Dilek;Kurtulus, Yasemin Bakircioglu;Ibar, Hilmi
在这项研究中，土壤样品收集埃迪尔内，土耳其在夏季和冬季，并进行了修改的社区参考局（BCR）连续提取程序，以调查土壤中的化学分配的金属和预测重金属的小麦籽粒在相同的土壤中生长的吸收。对样品进行BCR提出的三阶段浸提程序。这三个相按以下顺序分离出来：（1）碳酸盐，交换性，（2）铁锰氧化物，（3）有机质。用电感耦合等离子体原子发射光谱法测定了土壤组分和粮食样品中的金属含量。采用微波酸消解法对小麦样品进行分析。王水消化后测定金属的伪总浓度。通过使用标准参考物质（BCR 142 R轻质桑迪土壤、NIST 2711蒙大拿土壤和NIST 2704布法罗河沉积物）评价该方法的分析准确度。采用改良BCR连续提取法提取土壤样品中重金属含量与土壤样品中重金属伪总量之和计算回收率。为了评价金属的生物有效性，小麦金属和土壤提取金属浓度之间的关系进行了比较。
In this study, soil samples were collected from Edirne, Turkey in both summer and winter seasons and subjected to the modified Community Bureau of Reference (BCR) sequential extraction procedure in order to investigate the chemical partitioning of metals in soils and to predict heavy metals uptake by wheat grains which grown at the same soils. The samples were subjected to a three stage extraction procedure proposed by the BCR. The three phases that were separated out in the following order: (1) carbonate, exchangeable, (2) Fe-Mn oxides, and (3) organic matter. Metal concentrations of soil fractions and grain samples were determined by inductively coupled plasma atomic emission spectroscopy. The wheat samples were prepared to analysis using microwave acid digestion procedure. The pseudo-total concentrations of metals were determined after aqua regia digestion. The analytical accuracy of the method was evaluated by using the Standard Reference Materials (BCR 142R Light Sandy Soil, NIST 2711 Montana Soil, and NIST 2704 Buffalo River Sediment). The sum of the metal contents obtained from the modified BCR sequential extraction procedure and pseudo-total metal contents for soil samples were used to calculate recovery values. In order to evaluate the bioavailability of metals, the relationships between the wheat-metal and soil-extractable metal concentrations were compared.