The adsorption of phosphate from an aquatic environment using metal-loaded orange waste
The adsorption of phosphate from an aquatic environment using metal-loaded orange waste
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DOI：
10.1016/j.jcis.2007.03.072
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发表时间：
2007-08-15
影响因子：
9.9
通讯作者：
Kawakita, Hidetaka
中科院分区：
文献类型：
--
作者：
Biswas, Biplob Kumar;Inoue, Katsutoshi;Kawakita, Hidetaka
使用负载 La(III)、Ce(III) 和 Fe(III) 的橙色废物研究了水生环境中磷酸盐的去除。考察了吸附等温线、吸附动力学以及 pH 对磷酸盐去除的影响。使用负载 La(III) 和 Ce(III) 的橙色废凝胶去除磷酸盐的百分比随着 pH 在 5-7 范围内的增加而增加，但当 pH 值增加到超出该范围时则减少。观察到平衡吸附符合 Langmuir 型吸附，并且所有三种类型的凝胶的最大吸附容量被评估为 13.94 mg P/g 干凝胶。动力学研究表明，在批量实验中 15 小时足以达到平衡。固定床吸附实验证实了这种简单修饰的凝胶的连续磷酸盐吸附和洗脱能力。由于其低成本、可用性和显着高的吸附能力，负载金属的 SOW 凝胶可以有效地用于去除水中的磷酸盐。 (c) 2007 Elsevier Inc. 保留所有权利。
Phosphate removal from an aquatic environment was investigated using La(III)-, Ce(III)- and Fe(III)-loaded orange waste. The adsorption isotherm, the kinetics of adsorption and the effect of pH on the removal of phosphate have been examined. The % removal of phosphate using La(III)- and Ce(III)-loaded orange waste gel increases with increasing pH within the range of 5-7 but decreases when the pH is increased beyond this range. The equilibrium sorption was observed to be in accordance with Langmuir type adsorption and the maximum adsorption capacity was evaluated as 13.94 mg P/g of dry gel for all the three types of gels. Kinetic studies revealed that 15 h is enough to reach equilibrium in batch experiments. Fixed bed sorption experiments confirmed the continuous phosphate adsorption and elution capability of such simply modified gels. Due to their low cost, availability and significantly high adsorption capability, metal-loaded SOW gels can be effectively employed for the removal of phosphate from water. (c) 2007 Elsevier Inc. All rights reserved.