Competitive Biosorption of Lead Mercury Chromium and Arsenic Ions onto Activated Sludge in Batch Adsorber

Abstract

A wide range of batch experiments were carried out for estimation of the key process parameters in competitive biosorption of Pb 2+ , Hg 2+ , Cr 3+ and As 5+ from simulated of wastewater onto dry activated sludge in batch adsorber. Eleven isotherm models were used for single component and five models for multi-component systems. The Langmuir model gave the best fit for the data of single component, while the binary, ternary and quaternary systems were fitted successfully with extended Langmuir model. The biosorption capacity for single metal decreased by 11-51 %, 53-88 % and 79-94 % in the binary, ternary and quaternary systems respectively at the optimum agitation speed 600-800 rpm. An order of metal biosorption capacity onto dried activated sludge was the same in the case of . FT-IR analysis was carried out before and after biosorption to determine which functional groups were responsible for binding the heavy metals. Kinetic study showed that pseudo-second order model was well fitted for all metals ions. R 2 used to enhance the justification analysis for each used model.

STUDY OF BINARY AND SINGLE BIOSORPTION BY THE FLOATING AQUATIC MACROPHYTE Salvinia natans

“…These results confirm the better fit of the Langmuir model. It is possible to observe that, in the competitive system (Figure 2-(c) Sulaymon et al (2013) who studied the competitive biosorption of lead, mercury, chromium and arsenic ions onto activated sludge in batch. The authors found that Pb 2+ was always adsorbed more favourably onto activated sludge than the other ions when present in the binary, ternary and quaternary systems.…”

Removal of Cadmium from Polluted Aqueous Solutions Using Agricultural Wastes

“…• The most severe from Cd (II) toxicity in humans is "itai-itai", a disease characterized by excruciating pain in the bone (Sulaymon and abdul-Hameed, 2010).…”