Surface adsorption of poisonous Pb(II) ions from water using chitosan functionalised magnetic nanoparticles

Abstract

In this study, chitosan functionalised magnetic nano-particles (CMNP) was synthesised and utilised as an effective adsorbent for the removal of Pb(II) ions from aqueous solution. The experimental studies reveal that adsorbent material has finer adsorption capacity for the removal of heavy metal ions. Parameters affecting the adsorption of Pb(II) ions on CMNP, such as initial Pb(II) ion concentration, contact time, solution pH, adsorbent dosage and temperature were studied. The adsorption equilibrium study showed that present adsorption system followed a Freundlich isotherm model. The experimental kinetic studies on the adsorption of Pb(II) ions exhibited that present adsorption process best obeyed with pseudo-first order kinetics. The maximum monolayer adsorption capacity of CMNP for the removal of Pb(II) ions was found to be 498.6 mg g. The characterisation of present adsorbent material was done by FTIR, energy disperse X-ray analysis and vibrating sample magnetometer studies. Thermodynamic parameters such as Gibbs free energy (Δ°), enthalpy (Δ°) and entropy (Δ°) have declared that the adsorption process was feasible, exothermic and spontaneous in nature. Sticking probability reported that adsorption of Pb(II) ions on CMNP was favourable at lower temperature and sticking capacity of Pb(II) ions was very high.

Magnetic Nanocomposite Material Containing Chitosan Polymer Used in Wastewater Depollution Processes

“…For the wastewater having the pH in the basic range, the results are shown in Figures 6, 7 and 8. The results of wastewater treatment yield reach 100% treatment efficiencies compared to that presented in other scientific literature, which showed a yield of approximately 90% [22].…”

“…This maximum efficiency represents a more efficient wastewater treatment comparing with other research, which revealed the obtaining of a treatment efficiency of about 30%. [22].…”

Fabrication, calibration, and preliminary testing of microcantilever‐based piezoresistive sensor for BioMEMS applications

“…Many researchers use adsorption techniques to remove the HMIs from groundwater [21][22][23][24][25][26] and help to remove the hazardous heavy metals after the contaminated source is detected. The proposed sensor platform can be used as an early warning system to identify the contaminated source at the picomolar range.…”

Highly selective sensor for the detection of Hg 2+ ions using homocysteine functionalised quartz crystal microbalance with cross‐linked pyridinedicarboxylic acid

“…A carbon nanotubes‐based sensor also used to detect the HMIs selectively but at micromolar range [7, 8] and single‐walled boron nitride nanotube and triple‐walled boron nitride nanotube‐based biosensor simulation approach capable of detecting zeptogram of mass [9, 10] but need to check the sensitivity and complexity of the fabricated device. Many authors used Au/Ag nanoparticles (NPs) for the selective detection of mercury and other biomolecules, but measurements mainly taken in the laboratory‐based analytical instruments and on‐site detection is not possible [11–27]. The mesoporous silica‐based optical selective detection and removal of Hg 2+ ions using nanocomposite material by Shahat et al [28] is a highly pH‐dependent approach, and lower concentration in the nanomolar range is not possible.…”