| The environmental pollution of heavy metal ions (HMI) has already become serious problems that influence the survival environment of human being and other creatures. It will have wide application prospect in environment protection, resources recovery and reclamation to find a good and cheap adsorbent, which are both environmental friendly and can adsorb HMI effectively.In this thesis, Coal-based chelated humic resin which was synthesized in a process including condensation, restructuring and granulation was prepared by polymerization of humic resin and polyamine monomers. It was a new adsorbent that had functions as adsorption and separation and cost low. The structures were also characterized by FTIR.It was determined that coal-based chelated humic resin with Sodium humate and PEPA in a ratio of 4:1 and Sodium humate and sodium alginate in a ratio of 4:1, exhibited a good performance in HMI (Cu2+, Zn2+ and Ni2+) adsorption. Through the FTIR analysis of coal-based chelated humic resins, confirmed that the introduction of resins containing N functional groups and the nitrogen atoms in the state to pay. The structural characteristics matched with the expected formation of the polyamines briquette-chelating resin.The static adsorption properties such as swelling properties, adsorption capacities, dynamics, isothermal adsorption and reclamation for HMI (Cu2+, Zn2+ and Ni2+) were studied. The mechanism of adsorption was also investigated. The results indicated that: (1) The coefficient of resin swelling decreased with lower of the polar solvent. It can swell in acid or base solutions without flowing away and can be reused. (2) The resin had higher adsorption capacities for HMI (Cu2+, Zn2+ and Ni2+) and the adsorption was Cu2+>Zn2+>Ni2+. (3) The Langmuir and Elovich dynamics equation were used for simulating the experimental data. It could be found out that the Langmuir dynamics equation can accurately describe adsorption dynamics of the resin. It was mainly monomolecular adsorption. (4) The adsorption isotherms approximately fitted the Langmuir or Freundlich equation within the range of experimental concentrations and was monomolecular adsorption. (5) The resins had also high adsorption capacities after being regenerated. They are promising to be widely used in dealing with industrial sewage containing HMI (Cu2+, Zn2+ and Ni2+).Lastly, the factors, such as adsorption time, granularity, dosage, temperature, PH value, original consistency were investigated to make sure the effects on HMI adsorption. The suitable adsorption conditions were that temperature was 20～25℃, granularity was about 1mm, the dosage was 0.5g in the experiment of 50mL solvent which original consistency was 100mg/L, pH=5.0～7.0.This condition was good for HMI (Cu2+, Zn2+ and Ni2+) adsorption on the Coal-based chelated humic resin. |
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