Table 2: Physicochemical and metal analysis of the control soil and biosolid sample.

ParameterSamplesMethodG (mg/kg)MCA (mg/kg)
CS (mg/kg)B (mg/kg)

Arsenic16.8<LQSM21 3120B3.541
Barium5.91158SM21 3120B751300
Cadmium<LQ<LQSM21 3120B<0.539
Total calcium25.43939SM21 3120B
Organic carbon (g/kg)12.6279SSSA Cap40
Lead49.3174SM21 3120B17300
Copper37.2276SM21 3120B351500
Electric conductivity (μs/cm)1155389SM21 3120B
Chromium31.2224SM21 3120B401000
Total sulfur15111864SM21 3120B
Total phosphorus18217027SM21 3120B
Total magnesium<LQ358SM21 3120B
Mercury<LQ1.08EPA 7470A0.0517
Molybdenum3.649.55SM21 3120B<450
Nickel13.082.3SM21 3120B13420
Nitrate (mg/Kg)4.406.79SM21 4500- E
Nitrite (mg/Kg)0.061.39SM21 4500- B
Ammoniacal nitrogen (mg/kg)31.8167SM21 4500-NH3 E
Kjeldahl nitrogen (mg/Kg)47621620SM21 4500-Norg B
pH6.208.01EPA 4095 C
Total potassium4062152SM21 3120B
Selenium<LQ<LQSM21 3120B0.25100
Total sodium<LQ<LQSM21 3120B
Solid content0.860.24SM21 2540B
Moisture (g/g)0.140.76SM21 2540B
Zinc23.2825SM21 3120B602800

CS: control soil; B: biosolid; LQ: limits of quantification; IV: inconsistent value; G: guidelines of quality for soil (mg/kg) and groundwater in São Paulo State, according to CETESB (195/2005-E); MCA: maximum concentration allowed in sewage sludge or derivative product, according to CONAMA (375/2006).