Evaluation of kinetics and equilibrium studies of biosorption potentials of bamboo stem biomass for removal of Lead (II) and Cadmium (II) ions from aqueous solution

Abstract

The discharged of lead and cadmium above maximum permissible limits into surface water and environment without any pre-treatment methods has caused severe heath challenges to humanity. In other to minimize the reoccurrence, this research aim to ascertain biosorption capacity of bamboo stem biomass to remove lead and cadmium from aqueous solution. Batch experiment and data evaluation under optimum removal conditions (such as pH, contact time, temperature, biosorbent dosage, initial heavy metal concentration) were determined. Maximum optimum removal was observed for both metal ions at pH 5, 90 min contact time, 298K temperature with 50 ppm of initial concentration for 95.92 and 80.98% removal for lead and cadmium. Lead revealed better results at all concentrations for bamboo stem biomass with increase in percentage removal as concentration of heavy metal increases. Kinetics and isotherms models were applied and this shows that kinetic models are described and fitted well with pseudo-second order reaction while adsorption isotherm model supported Freundlich model with high R 2 values. Thermodynamically, biosorption of lead and cadmium was exothermic and lead was greater than cadmium in the order of spontaneity and entropy. From these results, it can be concluded that bamboo stem biomass has been shown to be productive in removal of heavy metals from aqueous solution.

Elimination of Cadmium (II) in aqueaous solution using corn cob (Zea mays) in batch system: adsorption kinetics and equilibrium

“…Increasing the temperature can reduce the adsorption powers between the adsorbate and the adsorption destinations on the biomass surface, causing a reduction in the adsorption limit. This phenomenon is observed in the results presented in this study, as well as in others when using various biomasses such as bamboo stems (Akinyeye et al, 2020), microalgae Parachlorella sp. (Dirbaz & Roosta, 2018), and Aphanothece sp.…”

“…Thus, more cadmium ions escape from the solid phase, according to what was reported by Cherik & Louhab (2018) and Naseem et al (2019). It has been found that at high temperature, the thickness of the boundary layer decreases due to the expanded inclination of the metallic particle to escape from the surface of the biomass to the disposition stage, which causes a decrease in adsorption as the temperature increases (Akinyeye et al, 2020). Increasing the temperature can reduce the adsorption powers between the adsorbate and the adsorption destinations on the biomass surface, causing a reduction in the adsorption limit.…”

Equilibrium isotherm and kinetic study of biosorption of cadmium from synthetic water using wastes leaves of Averrhoa carambola

“…The Freundlich isotherm depends on the interaction between adsorbed ions. It is expressed as by equation (5).…”

Domestic Water Filter for Treatment of Arsenic Contaminated Water

“…With the aim of addressing sustainable development and environmental pollution, researchers around the world proposed and implemented several pollution reduction methods. Existing water treatment technologies adopted for the removal of Arsenic include oxidation, chemical settling, exchange of ions, adsorption, separation of membrane, electrodialysis, coagulation-precipitation and reverse osmosis etc (17)(18)(19)(20). Due to their high energy demand, low efficiency in metal removal, generation of sludge, high capital cost, expensive maintenance, membrane replacement and chance of clogging etc (21)(22)(23), there is a high demand for simple, versatile technology that will help in cost process.…”