Study on Preparation and Application of Adsorption Copper Ionsby Amino-grafted Fiber

In this paper, using bleaching bagasse pulp cellulose as substrate, diethylene triamine as monomer and cerium ammonium nitrate as initiator, amino-grafted fiber was prepared, then it attained efficient heavy metals adsorbent. The influence of monomer dosage, initiator dosage, temperature, time and other factors on the preparation of amino-grated fiber were investigated. The structure of amino-grafted fiber was characterized by FTIR spectra, X-ray diffraction and scanning electron microscope analysis. In addition, it studied amino-grafted fiber absorbent on Cu( Ⅱ) ions, which did adsorption research to explore better adsorption conditions from the following aspects including temperature, time, pH value, grafted fiber content and the initial concentration of copper ions solution. The results showed that mass ratio both oven dried bagasse fiber and monomer diethylene triamine was 1:1, the dosage of ammonium ceric nitrate was 25%, temperature was70℃, time was 2h, which could receive higher adsorption capacity for copper ions reaching 12.8 mg/g. The structure of grafted fiber was characterized by FTIR spectra and scanning electron microscope analysis. Eventually, better conditions for amino-grafted fiber adsorption of copper ion solution were: time was 20min, temperature was 30℃, pH value was 4.5, the initial concentration was 300~400mg/L. Doing kinetics research on adsorption process, Lagrange second-order kinetic equations y=0.0116x+0.021 was determined.