Copper ferrite (CuFe2O4), a novel type of nanoparticle manufactured from industrial sludge, has been found to be effective for Pb remediation in aqueous solutions. Our results indicated that over 90% of Pb was removed/recovered from solutions at pH 4.5 and 298 K. A significant negative relationship was detected between the amount of Pb adsorbed and the concentrations of NaCl, indicating that the Pb adsorption onto CuFe2O4 was dominated by the outer-sphere complex. This relationship successfully showed a fast kinetics process during Pb adsorption with the implementation of kinetic models, while the simultaneous monolayer and multilayer mechanisms in Pb adsorption could be well described using isotherm models. Additionally, in simulated seawater adsorption, Pb adsorption was independent of coexisting cations, thereby confirming the Pb removal/recovery potential of CuFe2O4 in the seawater matrix. In desorption experiments, the recovering sequence of desorption reagents was HNO3 ≅ HCl > H2SO4 > H3PO4. This result indicated that Pb desorption efficiency was highly dependent upon reagent concentration, and 0.005 N HNO3 was sufficient for Pb desorption. CuFe2O4 is a good and low-cost solution for simultaneously resolving industrial sludge and remediating aqueous Pb.
|頁（從 - 到）||197-205|
|期刊||Journal of the Taiwan Institute of Chemical Engineers|
|出版狀態||Published - 2017 二月 1|
All Science Journal Classification (ASJC) codes
- 化學 (全部)
- 化學工程 (全部)