Table 1.
Summary of soil characteristics in the media
| Characteristics | Size, value, or concentration |
|---|---|
| Particles (mm) | < 0.002 |
| pH* | 6.9 |
| Organic carbon (%)† | 1.95% |
| Metal ion (mg/Kg)‡ | |
| Cu | ND |
| Zn | 38.3 |
| Mn | 14.9 |
| Cr | ND |
| Ni | ND |
| Cd | ND |
| Pb | ND |
| Fe | 190.2 |
*
The pH was measured in a 1:2.5 soil:water suspension and electrical conductivity was determined using a saturation paste extract.
†
The organic matter concentration was determined by the dichromate oxidation method.
‡
The heavy metal content was analyzed by microwave extraction according to method 3051A of the United States Environmental Protection Agency (USEPA, 1998). The concentration was determined by flame (air-acetylene) atomic absorption spectroscopy (FAAS).
ND = not determined.