Research Article

Behavior and Distribution of Heavy Metals Including Rare Earth Elements, Thorium, and Uranium in Sludge from Industry Water Treatment Plant and Recovery Method of Metals by Biosurfactants Application

Table 2

Physical-chemical characteristics of original sludge and polluted sludge.

ParametersOriginal sludgePolluted sludge

pH(H2O)5.784.47
pH(KCl)5.084.42
EC, μS·cm−13601926
Moisture content, %6.107.13
Permeability, cm·s−11.75 × 10−51.72 × 10−5
Organic matter content, %14.014.0
Cation exchange capacity (CEC), cmol·kg−133.630.5
BET-specific surface area (SSA), m2·g−1
Langmuir-specific surface area (SSA), m2·g−1
36.0
56.2
29.4
45.8