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以红薯淀粉、丙烯腈(AN)为主要原料,硝酸铈铵为引发剂,得到腈基淀粉微球,再用N,N-二甲基甲酰胺作为溶剂,在反相溶液中以盐酸羟胺还原,得到拥有大量氨基的改性淀粉絮凝剂。通过对该絮凝剂的红外表征、形貌观察、孔径分布和比表面积测试,可初步判断其吸附的有效官能团—NH_2和—OH是存在的,初步获得吸附所需的孔径分布和比表面积。由此特性,完成以硝酸铅配制模拟吸附溶液,探讨其在不同投入量、pH值及吸附时间等条件下对Pb~(2+)的吸附能力,从而达到最佳的吸附率,确立优化条件,对西安市昆明路和汉城湖污水中的Pb~(2+)进行吸附,其吸附率约在60%左右。
Using sweet potato starch, acrylonitrile (AN) as main raw material and ammonium cerium nitrate as initiator, nitrile starch microspheres were obtained, and then N, N-dimethylformamide was used as solvent to reduce hydroxylamine hydrochloride in the reverse phase , Get a large number of amino modified starch flocculant. Through the infrared characterization, morphology observation, pore size distribution and specific surface area test of the flocculant, it can be preliminarily determined that the effective functional groups -NH2 and -OH are present, and the pore size distribution and the specific surface area are obtained preliminarily. Based on this characteristic, the simulated adsorption solution was prepared by using lead nitrate, and the adsorption capacity of Pb 2+ under different input amount, pH value and adsorption time was discussed so as to achieve the best adsorption rate and establish the optimum conditions , The adsorption of Pb ~ (2+) in Kunming Road and Seoul Lake in Xi’an was about 60%.