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以自制亚胺二乙酸和羧酸基功能纤维为吸附材料,系统研究了有限浴及柱吸附条件下对Ni~(2+)、Ca~(2+)和Mg~(2+)共存废水的选择性吸附性能。结果表明,与羧酸基纤维相比,亚胺二乙酸纤维具有很好的选择性吸附功能(有限浴条件下k_(Ca)~(Ni)和k_(Mg)~(Ni)分别为4.63和11.33;柱吸附条件下k_(Ca)~(Ni)和k_(Mg)~(Ni)分别为5.26和136.17),且对Ni~(2+)的饱和吸附容量可达100mg/g左右;以2.5mol/L硫酸溶液为洗脱剂,Ni~(2+)回收率≥94%;自制纤维经5次使用与再生循环后,对Ni~(2+)吸附容量基本不变,具有良好的实际应用前景。
The effects of Ni (superscript 2 +), Ca 2+ and Mg 2+ coexisting wastewater on the adsorption of iminodiacetic acid and carboxylic acid-based functional fibers were investigated systematically in a limited bath and column adsorption conditions Selective adsorption properties. The results showed that the iminodiacetic acid fiber has a good selective adsorption capacity compared with the carboxylic acid based fiber (K_ (Ni) and k_ (Mg) ~ (Ni) are 4.63 and 11.33; the adsorption capacities of k_ (Ca) ~ (Ni) and k_ (Mg) ~ Ni are 5.26 and 136.17, respectively), and the saturated adsorption capacity of Ni ~ (2+) 2.5mol / L sulfuric acid solution as eluent and Ni 2+ recovery ≥94%. After 5 cycles of self-made fiber and regeneration cycle, the adsorption capacity of Ni 2+ did not change basically, and had good Practical application prospects.