Simple method for removal of cadmium ions (ІІ)‎ from industrial wastewater using calcinated porcellanite

Abstract EN

A simple method is developed for the removal of cadmium ions from industrial wastewater.

Batch process has been used with natural and calcinated Iraqi porcellanite as adsorbent.

Experimental parameters were given, concentration cadmium ion 10-50 mg / L, pH from (2-10), time was 60 min and maximum adsorption was achieve at 30°C.The present study had indicated appositive relationship between the removal efficiency of Cadmium ions with the increasing weight of adsorbents.

Adsorption process was pseudo second- order kinetics, and followed Langmuir isotherm model which gave a better fit to the experimental data in comparison with the Temkin and Freundlich equations.

Thermodynamic studies of two different surfaces were also given and showed endothermic process.ΔH°, ΔG° and ΔS° values were measured and showed that adsorption is spontaneous.ΔH° was positive, while ΔG° was negative.

ΔS° was increased and showed activity of surface for adsorption.

X-RAY and FT-IR spectroscopy were used to prove that calcinated porcellanite was more efficient than natural porcellanite.