Sludge-adsorbents from palm oil mill effluent for methylene blue removal
Sludge-adsorbents from palm oil mill effluent for methylene blue removal
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DOI：
10.1016/j.jece.2013.08.026
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发表时间：
2013-12
影响因子：
7.7
通讯作者：
M. Zaini;Muaz Zakaria;S. Mohd-Setapar;M. A. Che-Yunus
中科院分区：
文献类型：
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作者：
M. Zaini;Muaz Zakaria;S. Mohd-Setapar;M. A. Che-Yunus
本工作的目的是表征污泥吸附剂从棕榈油厂废水中去除亚甲基蓝。在吸附剂的制备中使用了ZnCl2和KOH两种化学试剂。采用市售活性炭进行比较。根据吸附剂的比表面积，元素组成，表面形态和可用的官能团进行表征。在27 ± 1 °C条件下对亚甲基蓝进行吸附实验，采用平衡等温线和动力学模型对吸附数据进行分析。结果表明，污泥吸附剂对亚甲基蓝的去除效果与市售活性炭相当，尽管前者的比表面积远不如后者。亚甲基蓝的吸附符合Langmuir吸附动力学模型，而准一级和准二级吸附动力学模型能很好地拟合吸附动力学数据。结果表明，污泥吸附剂可以作为潜在的吸附剂候选人，从废水中去除亚甲基蓝。
This work was aimed to characterize sludge-adsorbents from palm oil mill effluent for methylene blue removal. Two chemical agents, ZnCl2and KOH were used in adsorbent preparation. Commercial activated carbon was employed for comparison. The adsorbents were characterized according to surface area, elemental composition, surface morphology and available functional groups. Methylene blue adsorption was carried out at 27 ± 1 °C, and the adsorption data was analyzed based on the models of equilibrium isotherm and kinetics. Results show that the methylene blue removal by sludge-adsorbents is comparable to that of commercial activated carbon, although the surface area of the former is much inferior to the latter. The adsorption of methylene blue could be well described by the Langmuir model while the pseudo-first-order and the pseudo-second-order models sufficiently fit the kinetics data. Results indicate that sludge-adsorbents could be employed as potential adsorbent candidate for methylene blue removal from wastewater.