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以FeSO4·7H2O、聚乙烯吡咯烷酮(PVP)和柠檬酸钠为原料,通过水热法制备了粒径为5μm左右的朵状Fe2O3亚微球。将其用于吸附重金属离子,考察了该微粒对Pb2+的吸附性能。结果表明,在吸附剂用量为0.05g,Pb2+初始浓度为1g·L-1,反应时间为1h时,达到饱和吸附终点。而三种不同PVP加入量(mpvp=0.25g,mpvp=0.75g,mpvp=1g)所生成产物的饱和吸附容量分别为:30mg·g-1、98.5mg·g-1和23.5mg·g-1。
Fe2O3-Fe2O3 submicrospheres with particle size of about 5μm were prepared by hydrothermal method using FeSO4 · 7H2O, polyvinylpyrrolidone (PVP) and sodium citrate as raw materials. It was used to adsorb heavy metal ions, and the adsorption of Pb2 + by the particles was investigated. The results show that when the amount of adsorbent is 0.05g, the initial concentration of Pb2 + is 1g · L-1 and the reaction time is 1h, the end point of saturated adsorption is reached. The saturated adsorption capacities of the products formed by three different PVP loadings (mpvp = 0.25g, mpvp = 0.75g, mpvp = 1g) were 30 mg · g -1, 98.5 mg · g -1 and 23.5 mg · g -1, 1.