CAJ | 학술논문

将壳聚糖与氯乙酸反应,通过控制反应条件制备了取代度为0.71的O-羧甲基壳聚糖,将改性后的O-羧甲基壳聚糖与多聚磷酸钠反应,制备了粒径分布在370-710nm的O-羧甲基壳聚糖纳米微粒,透射电镜观察表明该微粒呈球状,平均粒径为450nm.在此基础上研究了O-羧甲基壳聚糖纳米微粒对工业电镀镍废水Ni~(2+)吸附性能,考察了溶液pH、Ni~(2+)起始浓度、平衡吸附时间、粒径等因素的影响,结果表明:O-羧甲基壳聚糖微粒最佳吸附条件是Ni~(2+)溶液pH为8.0、Ni~(2+)溶液起始浓度为33.28mg/ml、平衡吸附时间为0.5h、粒径较小的O-羧甲基壳聚糖纳米微粒对Ni~(2+)的吸附量要大于粒径较大的吸附量.
장각취당여록을산반응,통과공제반응조건제비료취대도위0.71적O-최갑기각취당,장개성후적O-최갑기각취당여다취린산납반응,제비료립경분포재370-710nm적O-최갑기각취당납미미립,투사전경관찰표명해미립정구상,평균립경위450nm.재차기출상연구료O-최갑기각취당납미미립대공업전도얼폐수Ni~(2+)흡부성능,고찰료용액pH、Ni~(2+)기시농도、평형흡부시간、립경등인소적영향,결과표명:O-최갑기각취당미립최가흡부조건시Ni~(2+)용액pH위8.0、Ni~(2+)용액기시농도위33.28mg/ml、평형흡부시간위0.5h、립경교소적O-최갑기각취당납미미립대Ni~(2+)적흡부량요대우립경교대적흡부량.
The O-carboxymethyl chitosan with 0.71 substitution degree was prepared by chitosan and monochloroacetic acid reaction under the controlled conditions.By the ion gelatin method，a certain concentration of poly-phosphate responsed with the different concentration O-carboxymethyl chitosan olution.The O-carboxymethyl chitosan nanoparticles with particle size distribution in 370-710 nm was formed.TEM observation showed that the spherical nanoparticles had an average diameter of 450 nm.The O-carboxymethyl chitosan nanoparticles to Ni~(2+) adsorption properties including The solution pH value,Ni~(2+) initial concentration,equilibrium adsorption time and nanoparticle size which had effect on O-carboxymethyl chitosan nanoparticles adsorption Ni~(2+) were investigated.The result suggested that the optimum adsorption condition of O-carboxymethyl chitosan nanoparticles for Ni~(2+) is that the pH value was 8.0,Ni~(2+) initial concentration was 33.28mg/ml,and equilibrium adsorption time was 0.5h.Through the comparation of different particle size O-carboxymethyl chitosan nanoparticles adsorption ability,the result discovered that the smaller the O-carboxymethyl chitosan nanoparticles size has,the stronger the adsorption ability to Ni~(2+).