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以可溶性淀粉为原料,N,N′-亚甲基双丙烯酰胺(MBAA)为交联剂,采用反相悬浮聚合得到中性淀粉微球,再用Na3P3O9进行阴离子化得到阴离子淀粉微球,用红外光谱和扫描电镜对其进行表征分析。研究阴离子淀粉微球对Hg2+的吸附行为,考察了pH、时间、温度等因素对其吸附性能的影响。结果表明:在40℃、吸附时间150min、pH6的条件下,对Hg2+的吸附效果最好,最大吸附容量为2.30mmol/g;阴离子淀粉微球对Hg2+的吸附行为既符合Langmiur等温吸附方程又符合Freundlich等温吸附方程。
Using neutral starch microspheres with soluble starch as raw material and N, N’-methylene bisacrylamide (MBAA) as cross-linking agent, neutral starch microspheres were obtained by reversed-phase suspension polymerization and then anionized with Na3P3O9 to obtain anionic starch microspheres. Infrared spectroscopy and scanning electron microscopy analysis of its characterization. The adsorption behavior of Hg2 + by anionic starch microspheres was investigated. The effects of pH, time and temperature on the adsorption properties of Hg2 + were studied. The results showed that Hg2 + was best adsorbed at 40 ℃ for 150min and pH6, and the maximum adsorption capacity was 2.30mmol / g. The adsorption behavior of Hg2 + by anionic starch microspheres was in accordance with Langmiur isotherm equation Freundlich isotherm equation.