Comparisons of Cd, Cu, Pb and Zn concentrations in reagent blanks with their instrumental and analytical Trichostatin A HDAC inhibitor detection limit for soils and plants are shown in Table 1. In addition, comparisons between observed and recommended scientific study concentrations of metals in international certified materials are summarized in Table Inhibitors,Modulators,Libraries 2.Table 1.The results of QA/QC in chemical analysis for soils and plants (Units: ��g g?1).Table Inhibitors,Modulators,Libraries 2.Comparison between observed and recommended concentrations of metals in international certified materials (Units: ��g g?1).3.?Results3.1. Heavy metal concentrations in surface soils and their characteristicsThe range and mean concentrations of Cd, Cu, Pb and Zn in surface soils sampled in and around the mine are summarized in Table 3.
The mean value for Cd in surface soils taken in the mine dump sites is 4.
4 ��g g?1 with a range from 1.0 to 16.7 ��g g?1. Cadmium concentrations in soils sampled from other sites Inhibitors,Modulators,Libraries are slightly lower than the dump site, ranging from 0.4 to 5.1 ��g g?1. The Cu in surface soils of the mine dump sites ranges from 111 to 7,910 ��g g?1 with a mean Inhibitors,Modulators,Libraries value of 1,953 ��g g?1. Soils Inhibitors,Modulators,Libraries samples of both uncultivated and household garden sites (within 1.2 km of the mine) contain similar levels of Cu with mean values of 183 and 269 ��g g?1, respectively. However, the concentrations of Cu in the control soils, not influenced by mining, ranged from 19 to 49 ��g g?1 which s close to the world average of 30 ��g g?1 [18].
The mean value for Pb in the mine dump sites is Inhibitors,Modulators,Libraries 1,030 ��g g?1 with a range of 146 to 3,020 ��g g?1, compared to the mean value for the control counterpart (18 ��g g?1), which is similar to the world average of 15 ��g g?1 [19].
The mean value for Zn in the mine dump sites (419 ��g g?1) with a range from 55-2,370 ��g g?1 was significantly higher than that in the control area (97 ��g g?1). However, some mine dump soils showed highly elevated levels of Zn with a maximum of 2,370 ��g g?1.Table 3.Heavy metal concentrations in surface soils and Inhibitors,Modulators,Libraries their physical and chemical properties.The general properties of surface soils in the study area are also described in Table 3. Soil pH in mine dump samples ranged from 3.0 to 5.7 with an average of 4.1. Soil pH sampled from the other sites was around 5.6.
Inhibitors,Modulators,Libraries Most soils had very low organic matter content, less than 10 % loss-on-ignition. In addition, soils in the mine dump sites had a relatively low cation exchange capacity of 11.
5 meq/100g, whilst cultivated soils, including household garden soils and control soils, Brefeldin_A exhibited a high capacity for cation exchange (23.2 and 30.1 meq/100g, Batimastat respectively). Most mine dump soils had a sandy texture with small selleck chem DAPT secretase amounts of silt and clay.3.2. Heavy metal concentrations in plantsThe further info concentrations of Cd, Cu, Pb and Zn in plants grown on soils in and around the mine are summarized in Table 4.