Removal of Reactive Red 2 and Methylene Blue from Aqueous Solutions by Adsorption Using Soybean Meal as Adsorbent

Na Peng, Kaifeng Wang
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引用次数: 1

Abstract

The removal of reactive red 2 and methylene blue from aqueous solution was studied using soybean meal as an adsorbent. The effects of some parameters such as solution pH and contact time on the adsorption were investigated. The equilibrium time was found to be more than 60 min for equilibration. Equilibrium data conformed to the Freundlich, Langmuir and Redlich¨CPeterson isotherm models, where the maximum adsorption capacity of methylene blue was 50.2 mg g-1 for the Langmuir isotherm at 25 ¡æ, but the maximum adsorption capacity of reactive red 2 was low (16.4 mg g-1). Soybean meal, which are easily available and inexpensive, could be employed as a promising adsorbent for the removal of methylene blue, but not for reactive red 2.
以豆粕为吸附剂吸附去除水溶液中的活性红2和亚甲基蓝
研究了以豆粕为吸附剂对水溶液中活性红2和亚甲基蓝的去除效果。考察了溶液pH和接触时间等参数对吸附性能的影响。发现平衡时间大于60 min。平衡数据符合Freundlich、Langmuir和Redlich¨peterson等温线模型,其中25℃时Langmuir等温线对亚甲基蓝的最大吸附量为50.2 mg g-1,而对活性红2的最大吸附量较低(16.4 mg g-1)。豆粕是一种容易获得且价格低廉的吸附剂,可作为去除亚甲基蓝的吸附剂,但对活性红2的吸附效果较差。
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