This composite material not only exhibits better recyclability but can also cope with a higher concentration of Pb(II). Additionally, it has good potential for the removal of Pb(II) from water and liquid food. 2. Materials and Methods 2.1. Materials Pb(NO3)2, Zn(CH3CO2)2·6H2O, 1,4-...
A portion (0.2000 g) of each soil sample was digested with aqua regia for the determination of Hg and As, and a mixture of HNO3-HF-HClO4 for the measurement of Cd, Pb, Cr, Cu, Zn, Ni. The concentrations of Hg and As in soil were measured by atomic fluorescence spectroscopy (AFS-...