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以腐植酸(HA)为原料,经两步酯化制备了改性腐植酸(HAE)吸附材料,用IR,SEM对HAE进行了表征,并考察了p H值、温度、离子浓度和时间等因素对其吸附行为的影响。实验结果表明:HAE对稀土离子的吸附在30 min左右即可达到平衡,p H值和离子浓度对La~(3+)和Ce~(3+)吸附量有较大影响,但温度对Ce~(3+)吸附量的影响较小。La~(3+)和Ce~(3+)在p H=5.5,T=35℃条件下的饱和吸附容量分别
The humic acid (HA) was used as the raw material to prepare modified humic acid (HAE) adsorbent by two-step esterification. The HAE was characterized by IR and SEM, and the p H value, temperature, ion concentration and time Effect of factors on its adsorption behavior. The experimental results show that adsorption of rare earth ions by HAE can reach equilibrium in about 30 min, p H value and ion concentration have a great effect on the adsorption amount of La 3+ and Ce 3+, ~ (3 +) adsorption amount of less affected. The saturated adsorption capacity of La ~ (3+) and Ce ~ (3+) at p H = 5.5 and T = 35 ℃