The adsorption kinetic process for Cr（VI）on peat was studied. The results show that pH values and initial mass concentrations of Cr（VI）have great influences on adsorption of Cr（VI）. Smaller pH values with higher positive charge on the surface of peat and lower initial mass concentration of Cr(VI) were favor for higher adsorption of Cr（VI）. New L-F kinetic model can describe procedures of adsorption of Cr（VI）on peat excellently in the 10~20 mg/L of initial mass concentration of Cr(VI). Intercepts derived from new L-F kinetic equation, Co/(Co-Ce) reflects the adsorption strength of peat. The "more to one " means can deduce fitting function relation between initial concentration of Cr(VI) and adsorption constants

      Magnetic poly(acrylate methyl ester) resin (RM) was prepared by suspension polymerization using N,N'-methylenebisacrylamide as a crosslinker. Then RM was modified with ethylenediamine to give a novel amine-chelating magnetic resin(RMA). This adsorbent was characterized by thermal analysis (DTA/TGA) and FT-IR. The adsorption behaviour of the adsorbent toward Cu ²⁺ ions was investigated. The results show that the diameter of RMA is 30~60 μm and the mass fraction of Fe ₃O ₄ is 6.7%. The isotherm adsorption data obeyed the Langmuir model. In the aspect of maximum adsorptiom capacity, RMA displayed higher (2.13 mmol/g) for Cu ²⁺ than that of RM (1.15 mmol/g). Kinetics studies indicate that the adsorption reaction followed the pseudo-second order kinetics. Thermodynamic analysis indicates that the adsorption process was spontaneous, and that the value of enthalpy changes was -17.88 kJ/mol, the entropy changes was -2.06 J/(mol· K) and the Gibbs free energy was -17.26~ -17.19 kJ/mol. Regeneration of the adsorbent was achieved using 1 mol/L HCl with the desorption ratio of more than 97%.

  0.684 4）and common logarithm of adsorption index （1.693 2，1.711 5）for peat and humin are almost equal. They indicate that humin may control the binding ability of Ni ²⁺ onto peat. The results show that humin can act as a potential material for permeable reactive barrier.