大孔球形纤维素吸附剂的制备及性能研究

本课题以天然棉纤维为原料，通过碱化、老化、碳化以及溶解，制得纤维素粘胶，按一定比例加入Ca-CO3，然后，采用反相悬浮再生法，制备纤维素球，在HCl-NaCl-CaCl2。混合溶液中除去CaCO3后，得大孔球形纤维素经SEM对整体结构和表面结构进行了表征。这种大孔球经环氧化后，制备了一种开链氮杂冠醚化大孔球形纤维素吸附剂（PSC-OCAC），测定了PSC-OCAC对几种常见金属离子的吸附性能，并应用到江河水体中几种金属的分离、富集，建立起PSC-OCAC-分离富集-火焰原子吸收分光光度法，测定水体中痕量重金属总量的方法，测定了南充境内两河、嘉陵江水体中的几种常见重金属含量。

Preparation and property of porous spherical cel iulose sorbent

Viscose was prepared by alkalization,age,xanthation and dissolution of raw material-cotton,Viscose was mixed with CaCO3 powder,then spherical cellulose beads were prepared by applying the thermal solution-gel transition technique.The product was suspended in HCl-NaCl-CaCl2 to get rid of the CaCO3,and then Porous cellulose sphere(PCS)was prepared and characterized by SEM and IR.Porous cellulose sphere(PCS)was modified by the open chain azacrown,adsorption capacities of PSC-OCAC for some common metal ions were determined,and then apply to separate and enrich heavy metals in river water,and then set up a method of determination of heavy metals.