Evaluation of Lead Adsorption Using Synthesized Copper Ferrite Magnetic Nano-particles

  • 陳 玫璇

Student thesis: Master's Thesis

Abstract

Lead (Pb) has been used extensively for many industrial purposes since the 19th century industrial revolution However Pb pollution can be found in various aquatic systems due to improper management of Pb contained waste or waste water Being one of the major toxic inorganic pollutants Pb can pose serious threat to living creatures at rather low concentration of 26–100 μg L-1 Once the blood lead (PbB) level of children exceeds 100 μg L-1 the central nervous system would damage and the body function may exhibit anomalous Therefore development of Pb remediation for drinking waters is critical and required In this study copper ferrite nano–particles (CuFe2O4) manufactured from industrial sludge were employed to evaluate aqueous Pb adsorption–desorption under various pHs duration initial Pb concentrations and solution matrix Furthermore a prospective study will be evaluated for Pb pre–concentration through the adsorption and desorption procedure Our results indicated that the function of pH in sorption capacity of CuFe2O4 nano–particles was insignificantly and reached the value of up to 90% at pH of 4 5 The adsorption kinetics fit well with pseudo–second–order model which suggests that Pb adsorption is a fast kinetics Furthermore the sorption isotherm fits well with the Langmuir model and the maximum adsorption capacity of Pb was estimated to be 17 83 mg per gram sorbent at pH of 4 5 and temperature of 298 K On the other hand the ionic strength and coexisting cation showed negligible effect on Pb adsorption under seawater–like matrix In desorption experiments 0 005N HNO3 was evaluated as the best condition for Pb desorption with recovery of 75% in average which enables Pb recycled and regenerated In addition Pb contents in CuFe2O4 were estimated 0 314±0 003 mg g-1 by digestion and we infer that approximately 339 34±2 99 ng of Pb contribute to solution during desorption process Overall the novel low–cost fabricated CuFe2O4 from industrial sludge waste can be applied effectively for Pb remediation in aqueous solutions not only deal with the danger of sludge waste and waste water but also be considered as a reusable and cost–effective technique On the other hand through adsorption–desorption process it demonstrates a potential application in Pb enrichment through simple operation procedure of adsorption and desorption
Date of Award2015 Aug 17
Original languageEnglish
SupervisorChen-Feng You (Supervisor)

Cite this

Evaluation of Lead Adsorption Using Synthesized Copper Ferrite Magnetic Nano-particles
玫璇, 陳. (Author). 2015 Aug 17

Student thesis: Master's Thesis