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首页> 外文期刊>RSC Advances >Treatment of oil refinery effluent using bio-adsorbent developed from activated palm kernel shell and zeolite
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Treatment of oil refinery effluent using bio-adsorbent developed from activated palm kernel shell and zeolite

机译：使用生物吸附剂从活性棕榈籽壳和沸石的生物吸附剂处理炼油厂的炼油厂

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This study investigated the potential of palm kernel shell (PKS) as a biomass feed for adsorbent production. This work aims at synthesizing green adsorbent from activated PKS by integrating iron oxide and zeolite. The newly developed adsorbents, zeolite-Fe/AC and Fe/AC, were analyzed for surface area, chemical composition, magnetic properties, crystallinity, and stability. The adsorbent efficiency in removing effluent from the palm oil mill was evaluated. The influence of operating parameters, including adsorbent dosage, H _(2) O _(2) , reaction time, and initial solution pH for adsorption performance was studied. The Fourier transform infrared analysis revealed that the adsorbents contain functional groups including OH, N–H, CO and CC, which are essential for removing pollutants. The SEM-EDX analysis shows holes in the adsorbent surface and that it is smooth. The adsorption study revealed that under optimized conditions, by using 4 g L ~(?1) of adsorbent and 67.7 mM H _(2) O _(2) , zeolite-Fe/AC was able to remove 83.1% colour and 67.2% COD within 30 min. However, Fe/AC requires 5 g L ~(?1) of adsorbent and 87.7 mM to remove 86.8 percent and 65.6 percent, respectively. This study also showed that zeolite-Fe/AC has higher reusability compared to Fe/AC. Among Freundlich and Temkin models, the experimental data were found to be best fitted with the Langmuir isotherm model. The kinetic analysis revealed that for both adsorbents, the adsorption process fitted the pseudo-second-order model ( R ~(2) = 0.9724). The finding reflects monolayer adsorption of zeolite-Fe/AC and Fe/AC. This study thus demonstrates the applicability of low-cost green adsorbents produced from PKS to treat oil refinery effluent and other recalcitrant wastewaters.
机译：本研究研究了棕榈仁壳（PKS）作为吸附剂生产的生物质饲料的潜力。该工作旨在通过整合氧化铁和沸石来合成来自活化的PKS的绿色吸附剂。分析新开发的吸附剂，沸石-FE / AC和Fe / Ac，用于表面积，化学成分，磁性，结晶度和稳定性。评估了从棕榈油磨机中除去流出物的吸附效率。研究了操作参数的影响，包括吸附剂剂量，H _（2）O _（2），反应时间和初始溶液pH的吸附性能。傅里叶变换红外分析显示，吸附剂含有官能团，包括OH，N-H，CO和CC，这对于除去污染物是必不可少的。 SEM-EDX分析显示吸附剂表面中的孔，它是光滑的。吸附研究显示，在优化条件下，通过使用4g L〜（α1）的吸附剂和67.7mm H _（2）O _（2），沸石-FE / Ac能够去除83.1％的颜色和67.2％鳕鱼30分钟内。然而，Fe / Ac需要5g L〜（α1）吸附剂，87.7毫米分别去除86.8％和65.6％。本研究还表明，与Fe / Ac相比，沸石-FE / AC具有更高的可重用性。在Freundlich和Temkin模型中，发现实验数据最好与Langmuir等温线模型合作。动力学分析显示，对于两个吸附剂，吸附过程拟合伪二阶模型（R〜（2）= 0.9724）。该发现反映了沸石-FE / AC和Fe / Ac的单层吸附。因此，该研究表明，低成本绿色吸附剂的适用性由PKS治疗炼油厂流出物和其他顽固的废水。

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