载镧羧甲基魔芋葡甘聚糖凝胶微球的吸附除磷性能

Adsorption and Removal Performance of Phosphorus of the CMKGM Gel Microspheres Loaded with Metal Ions

采用魔芋葡甘聚糖羧甲基化并负载稀土金属镧的方法制备出载镧羧甲基魔芋葡甘聚糖凝胶微球吸附剂(CMKGM-La),研究了该吸附剂对模拟废水中磷的吸附去除特性,并用SEM-EDX和FT-IR分析技术对吸附剂形貌及吸附机理进行表征和分析。在pH值为4、吸附剂剂量为1 g/L、磷初始浓度为10 mg/L的条件下CMKGM-La凝胶微球吸附剂对磷的最大去除率可达95.45%。CMKGM-La凝胶微球吸附剂去除磷的可能吸附机理是稀土金属镧与磷之间的软硬酸碱相互作用和质子化羟基与磷之间的静电引力。

A gel microsphere absorbent of Carboxymethyl konjac glucomannan loaded with lanthanum was prepared by the method of Konjac Glucomannan Carboxymethylation and loading rare earth metal lanthanum. The characteristics of adsorption and removal of phosphorus in simulated waste water were investigated. The morphology and adsorption mechanism of adsorbent were characterized and analyzed by SEMEDX and FT-IR analysis technique. The removal ratio of the CMKGM-La gel microspheres for phosphorus is 95. 45% at the optimum conditions： pH = 4,the adsorbent dose of 1 g/L,initial phosphorus concentration of 10 mg/L. The possible adsorption mechanism of the CMKGM-La gel microspheres for phosphorus is soft and hard acid-base interaction between rare earth metal lanthanum and phosphorus,and the electrostatic attraction between protonated hydroxyl and phosphorus.