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Adsorption behaviors of humic acid absorbing by activated carbon from natural water

机译：自然水中活性炭吸收腐殖酸吸收的吸附行为

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The powder activated carbon (PAC) is used as adsorbents to study the adsorption performance of humic acid (HA) in aqueous solutions. The adsorption capacity of HA onto PAC increased with HA initial concentration, and decreased with pH and temperature, The maximum adsorbed amounts of HA onto PAC calculated by the Langmuir model at 25°C is 33.898 mg/g, according to Langmuir isotherm model, The n value 1.44 of Freundlich isotherm model is greater than 1.0, it indicates that PAC is feasible for the HA adsorption. Experiment results exhibits kinetic adsorption reached equilibrium about 120 minutes; the best selection in kinetic models is Pseudo second-order equation model. According to thermodynamic analysis, the adsorption of HA onto PAC is an exothermic process. Adsorption of HA by PAC has a good performance with higher HA concentration, lower pH and lower temperature.
机译：粉末活性炭（PAC）用作吸附剂，以研究腐殖酸（HA）在水溶液中的吸附性能。 HA在PAC上的吸附容量随着HA初始浓度而增加，并用pH和温度降低，通过Langmuir等温模型的Langmuir模型在25℃下计算的最大吸附量的HA达到PAC，是33.898mg / g， FReundlich等温模型的N值1.44大于1.0，表明PAC可用于HA吸附。实验结果表现出动力吸附达到约120分钟的平衡;动力学模型中的最佳选择是伪二阶方程模型。根据热力学分析，HA上的吸附于PAC是一种放热过程。 HA通过PAC的吸附具有良好的性能，具有较高的HA浓度，降低pH和更低的温度。

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