Study on Thermodynamics of Resin Adsorption for Metal Ions in Papermaking Wastewater III

use. At the same time, after the author's repeated “adsorption→elution→adsorption” of the resin 5 times, the adsorption rate of the resin is still about 98%, indicating that the resin can be reused and the effect is good.

2 Conclusion

1) Polyvinyl chloride Polyethylene polyamine resin can effectively adsorb metal ions in aqueous solution. The adsorption of metal ions on the resin is an exothermic process. The adsorption amount is related to the adsorption temperature and the concentration of metal ions in the solution.

2) The resin can be reused without secondary contamination. It has also been found that the resin can effectively adsorb organic acids in waste water (the results of the study will be published separately), and it does not contain complex acids. For the papermaking wastewater of metal ions, the resin is an environmentally friendly and efficient wastewater treatment agent.

3) According to the degree of treatment, wastewater treatment methods are divided into primary treatment, secondary treatment, tertiary treatment, and disinfection treatment, and the treatment of metal ions is only in the tertiary treatment, that is, in wastewater treatment. High- and medium-concentration suspended solids, organic matter, and other impurities are treated with metal ions after primary and secondary treatments. At this time, the undesirable factors that interfere with the resin adsorbent basically do not exist, and the adsorption efficiency to it is not Have a big impact.

4) Since the raw materials of the synthetic polyvinyl chloride polyamine polyamine resin are inexpensive and can be reused, the operation is simple, it can replace the traditional EDTA, and no additional equipment and devices are required, so the company will not bring Operational inconvenience and economic pressure. It is a promising papermaking wastewater treatment agent.

(The author / Li Shanyan Jiaying College)

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