Journal of Chemistry / 2015 / Article / Tab 1

Research Article

Relationship between Cadmium Fractions Obtained by Sequential Extraction of Soil and the Soil Properties in Contaminated and Uncontaminated Paddy Soils

Table 1

Soil properties.

SoilSoil typea pH 
(H2O)
pH 
(KCl)
T-C T-N CECExchangeable cations Base saturation Available phosphate PAC Particle size distr.Free iron oxideOxalate extractable
CaMgKClaySiltSandAloFeoAlo + 1/2 Feo
(g kg−1)(cmolc kg−1) (cmolc kg−1)(%)(mg kg−1)(g kg−1)(10−2 kg kg−1)(g kg−1) (g kg−1)

Uncontaminated-1Fluvaquents5.54.025.42.718.75.21.70.338.02729.228.234.137.78.93.25.56.0
Uncontaminated-2Fluvaquents6.55.520.71.69.16.01.50.386.79124.74.418.277.49.43.12.84.4
Uncontaminated-3Endoaquands5.84.862.14.425.89.82.70.851.743410.538.431.530.08.54.73.86.6
Uncontaminated-4Fluvaquents5.84.215.80.98.72.70.70.241.71883.88.612.379.15.52.01.83.8
Uncontaminated-5Fluvaquents5.94.324.41.816.16.31.40.349.63275.816.419.763.95.02.71.64.3
Uncontaminated-6Fluvaquents5.54.022.91.813.33.61.10.438.51486.013.817.868.53.12.22.24.4
Uncontaminated-7Epiaquepts5.54.133.62.220.65.42.10.238.11459.822.823.753.510.93.44.78.1
Uncontaminated-8Fluvaquents5.54.025.51.617.65.42.00.545.41607.717.530.452.111.02.45.47.9
Uncontaminated-9Fluvaquents6.14.619.61.79.93.81.30.354.82365.611.619.169.39.23.91.95.8
Uncontaminated-10Fluvaquents6.04.418.82.115.27.22.60.366.22247.218.823.757.69.62.44.97.3

Contaminated-1Fluvaquents5.74.532.02.614.34.30.90.137.05706.614.117.368.67.73.12.94.6
Contaminated-2Fluvaquents5.54.332.62.510.63.10.80.238.42774.310.115.074.94.72.22.03.2
Contaminated-3Fluvaquents5.64.746.33.717.66.01.90.647.97087.614.822.163.19.14.14.76.5
Contaminated-4Fluvaquents6.14.532.62.612.13.41.00.338.84014.214.414.770.94.52.72.94.2
Contaminated-5Fluvaquents5.94.937.82.815.46.21.30.350.75146.610.223.566.36.33.72.24.8
Contaminated-6Endoaquands6.25.143.52.920.56.92.70.448.888010.416.517.166.49.65.82.77.1
Contaminated-7Endoaquands5.64.548.23.717.45.21.20.539.63499.023.731.644.711.44.63.46.3
Contaminated-8Fluvaquents5.74.512.71.08.22.00.60.234.01432.95.67.886.612.30.93.42.6
Contaminated-9Fluvaquents5.94.715.21.28.32.91.10.351.81753.67.011.781.39.71.03.12.5
Contaminated-10Fluvaquents5.94.933.52.618.47.91.90.254.75288.522.336.241.513.94.25.46.9

Uncontaminated-AV5.84.426.92.115.55.51.00.351.03057.018.123.158.98.13.03.55.9
Contaminated-AV5.84.733.42.614.34.80.80.344.24556.413.919.766.48.93.23.34.9

T-C, total carbon; T-N, total nitrogen; CEC, cation exchange capacity; PAC, phosphate absorption coefficient.
aClassified by Soil Taxonomy [23].