本文以棉花为模板，浸渍醋酸锰溶液进而再煅烧的方法制备出具有棉花生物遗态的氧化锰。以氧化锰为基底，采用水热合成法制备出氧化锰基镁铝水滑石。利用热重差热（ TG?DTA）分析、X射线衍射（ XRD）和扫描电镜（ SEM）对其进行表征。将所得样品在500℃下煅烧，研究所得氧化物对铅离子的吸附性能，对吸附剂用量、初始浓度、温度、时间等对吸附有影响的因素进行了系统的研究。结果表明，在25℃下，50 mg生物遗态氧化锰基镁铝氧化物吸附浓度为50 mg·L－1的铅离子溶液，去除率可达99％以上，吸附可在120 min基本达到平衡，吸附动力学模型符合准二级动力学。吸附等温线符合D?R模型，吸附属于物理吸附，且升温有利于吸附。
In this paper, biomorphic manganese oxide was prepared by the method of impregnation and calcination using cotton as the template. MgAl Layered double hydroxides ( LDHs ) based on biomorphic manganese oxide was synthesized by a hydrothermal synthetic method. The structure of MgAl LDHs based on manganese oxide was characterized by thermogravimetric?differential thermal analysis ( TG?DTA) , X?ray diffraction ( XRD) and scanning electron microscopy ( SEM) . The as?prepared sample was calcined at 500 ℃, and its adsorption properties for lead ions from aqueous solution were investigated. The adsorbent dosage, initial concentration, temperature, time and other factors on the adsorption properties were examined in detail. It was shown that the adsorption reaction reached the equilibrium within 2 h and the remove efficiency reached more than 99% with 50 mg adsorbent, 50 mg·L-1 pb2+at 25℃. The kinetic data fit the pseudo?second?order kinetic model. The adsorption isotherm was fit to the D?R model and the adsorption mechanism was physical adsorption. Moreover, the temperature was favorable for the adsorption.
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