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首页> 外文期刊>Desalination and water treatment >Palm oil mill effluent sludge ash as adsorbent for methylene blue dye removal
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Palm oil mill effluent sludge ash as adsorbent for methylene blue dye removal

机译：棕榈油厂废水污泥作为吸附剂去除亚甲蓝染料

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This work was aimed to evaluate the adsorptive nature of palm oil mill effluent sludge ash for methylene blue dye removal in aqueous solution. Two types of palm oil mill effluent sludge collected from different treatment ponds, i.e. anaerobic and biopolishing were burnt to ash, and treated with 5 M HCl. The treated and untreated adsorbents were characterized for surface area and morphology. Methylene blue dye adsorption was carried out in laboratory at room temperature, and the adsorption data were analyzed based on equilibrium isotherm and kinetic models. The surface area of ash-adsorbents was found to increase more than 12 times after HC1 treatment. The highest surface area recorded was 218 m~2/g. Equilibrium data of ash-adsorbents obeyed Langmuir isotherm to linear approximation suggesting the monolayer uptake of methylene blue dye. The highest maximum uptake of 50.7 mg/g methylene blue dye (50% removal) was demonstrated by HCl-treated biopolishing ash-adsorbent at initial concentration of 200 mg/L and pH 5.8 ± 0.1. The kinetic data for selected HCl-treated ash-adsorbent were fitted to Ho's pseudo-second-order model, indicating chemisorption process. Results showed that ash obtained from palm oil mill effluent sludge after simple treatment with HCl could be employed as effective adsorbent for the removal of methylene blue dye.
机译：这项工作旨在评估棕榈油厂废水污泥灰分对水溶液中亚甲基蓝染料去除的吸附性能。从不同的处理池中收集的两种类型的棕榈油厂废水污泥，即厌氧和生物抛光，被燃烧成灰烬，并用5 M HCl处理。对经处理和未经处理的吸附剂的表面积和形态进行表征。在室温下于实验室进行亚甲基蓝染料的吸附，并根据平衡等温线和动力学模型分析了吸附数据。在HC1处理后，发现灰分吸附剂的表面积增加了12倍以上。记录的最高表面积为218 m〜2 / g。灰分吸附剂的平衡数据服从Langmuir等温线至线性近似，表明亚甲基蓝染料的单层吸收。在初始浓度为200 mg / L和pH值为5.8±0.1的条件下，通过HCl处理的生物抛光灰分吸附剂证明了50.7 mg / g亚甲基蓝染料的最高最大吸收量（去除50％）。将选定的HCl处理的灰分吸附剂的动力学数据拟合到Ho的拟二级模型，表明了化学吸附过程。结果表明，棕榈油厂废水污泥经HCl简单处理后得到的灰分可作为有效的吸附剂去除亚甲基蓝染料。

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