STRUCTURE OF CUPRIC COMPLEX WITH BIS—SCHIFF BASE

<正> The cupric complex CCu(PyNOpn)](ClO4)2 of bis-Schiff base was prepared by condensation of picolinaldehyde N-oxide (PyNO) with 1,2-propane di-amine (pn). Mr = 546. 76, monoclinic, space group P21/n, a = 6. 968(1), b = 12. 696(2), c=23. 122(5)(?), β = 97. 04(1)°, 7 = 2029: 98(?)3, 2 = 4, D, =1. 789g/ cm3, μ=14.0cm-1, F(000) = 1108, R = 0. 045 and Rw = 0. 051 for 1130 observed reflections. The ligand (PyNOpn) plays as a distorted square planar N2O2 donor via amide nitrogen atoms and N-oxide oxygen atoms coortinated to the Cu(Ⅱ) atom.     

ADSORPTION OF DINITROPHENOLS ONTO POLYMERIC ADSORBENTS AND ITS MECHANISM

The adsorption of 2,4-dinitrophenol and 2,6-dinitrophenol on non-polar and polar adsorbents was studied.The results showed that the equilibrium adsorption did not comply with the Langmuir equation and was not mono-layer adsorption .It is of interest to notice that the effect of pH on the adsorption of 2,4-or 2,6-dinitrophenol onto ADS-7 and ADS-21 was very small,The result is explained by hydrogen bonding interaction between 2,4-or 2,6-dinitrophenol and the adsorbent ADS-21.The large adsorption capacity of dinitrophenol onto ADS-21,which was about 500mg/g at an equilibrium concentration of 400mg/L,and the small dinitrophenol leakage in the effluent from ADS-21 column presented a good prospect for treatment of wastewater containing dinitrophenol with adsorbent ADS-21.