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Synthesis of activated carbon from peanut shell as dye adsorbents for wastewater treatment

机译:从花生壳的合成活性炭作为废水处理染料吸附剂

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摘要

In this study, the adsorption capacities of peanut shell activated carbon samples prepared using three types of peanut shell as raw material were compared. The effects of activation state, carbonization temperature, carbonization time, adsorption time during decolorization, and dosage on the performance of the peanut shell activated carbon samples were investigated. The performance of the modified peanut shell (activated carbon) on the decolorization of reactive brilliant blue X-BR and the adsorption kinetics were evaluated systematically. Among the three types of peanut shell activated carbon, the activated carbon that was first activated by phosphoric acid and then carbonized at 450 degrees C for 3 h displayed the best performance, with an optimum dosage of 4 gl(-1) and an optimum adsorption time of 2 h. The pseudo-second-order kinetics equation and the intraparticle diffusion equation could well describe the adsorption behavior of the activated carbon prepared by phosphoric acid activation. Intraparticle diffusion was not the only factor affecting the adsorption rate of the activated carbon on reactive brilliant blue X-BR.
机译:在这项研究中,比较了使用三种花生壳作为原料制备的花生壳活性炭样品的吸附能力。研究了脱色期间活化状态,碳化温度,碳化时间,吸附时间的影响,以及花生壳活性炭样品的性能的剂量。系统地评估了改性花生壳(活性炭)对反应性辉煌蓝X-Br的脱色和吸附动力学的性能。在三种类型的花生壳活性炭中,首先由磷酸活化的活性炭,然后在450℃下碳化3小时,呈现最佳性能,具有4G1(-1)的最佳剂量和最佳吸附时间为2小时。伪二阶动力学方程和桐县扩散方程可以很好地描述通过磷酸活化制备的活性炭的吸附行为。椎间内部扩散不是影响活性碳对反应性辉煌蓝X-BR上的吸附速率的唯一因素。

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