【摘要】：以聚乙烯醇(PVA)為黏合劑,將FeSO_4和KMnO_4以摩爾比5∶1復(fù)合制備了顆粒態(tài)鐵錳復(fù)合氧化物,采用掃描電鏡和紅外光譜對其進(jìn)行表征,并考察了其對溶液中磷的吸附特征及影響因素。結(jié)果表明,顆粒態(tài)鐵錳復(fù)合氧化物表面粗糙、孔隙結(jié)構(gòu)發(fā)達(dá),含有豐富的表面基團(tuán);顆粒態(tài)鐵錳復(fù)合氧化物對水中的磷具有良好的吸附效果,對磷的吸附量隨時(shí)間增加而增大,400min時(shí)可達(dá)吸附平衡,準(zhǔn)二級動力學(xué)方程能較好地描述該吸附動力學(xué)過程;Langmuir方程可較好地?cái)M合不同溫度時(shí)的等溫吸附數(shù)據(jù),且反應(yīng)溫度越高,平衡吸附量越大;離子強(qiáng)度變化及NO_3~ ,SiO_3~(2 ),SO_4~(2 )和CO_3~(2 )等共存離子存在對顆粒態(tài)鐵錳復(fù)合氧化物的吸附除磷過程影響不大;pH可顯著影響顆粒態(tài)鐵錳復(fù)合氧化物對磷的去除效果,pH≤5時(shí)磷的去除率較高且基本保持不變,pH5時(shí)去除率隨pH升高而降低。
[Abstract]:Using polyvinyl alcohol (PVA) as adhesive, particulate Fe-mn composite oxide was prepared by using FeSO_4 and KMnO_4 at molar ratio of 5:1. The composite oxide was characterized by scanning electron microscope (SEM) and infrared spectroscopy (IR). The adsorption characteristics and influencing factors of phosphorus in solution were investigated. The results show that the surface of the particulate Fe-mn composite oxide is rough, the pore structure is developed, and it contains rich surface groups. The particulate Fe-mn composite oxide has a good adsorption effect on phosphorus in water, the adsorption capacity of phosphorus increases with the increase of time, and the adsorption equilibrium can be reached at 400min. The quasi-second-order kinetic equation can well describe the adsorption kinetic process. The Langmuir equation can well fit the isotherm adsorption data at different temperatures, and the higher the reaction temperature is, the greater the equilibrium adsorption capacity is, and the change of ion strength and the existence of co-existing ions such as NO_3~, SiO_3~ (2 /), SO_4~ (2 /) and CO_3~ (2 /) have little effect on the adsorption and phosphorus removal process of particulate Fe-mn composite oxides. PH can significantly affect the removal efficiency of phosphorus by particulate Fe-mn composite oxides. The removal rate of phosphorus is high and basically unchanged at pH 鈮，

本文編號：2523266