标题：Phosphate Removal from Aqueous Solution by Adsorption on Modified Giant Reed
作者：Qin-Yan Yue;Wen-Yi Wang;Bao-Yu Gao
作者机构：[Yue, Q.-Y] School of Environmental Science and Engineering, Shandong University, Num 27 ShanDaNanLu, Jinan 250100, China;[ Wang, W.-Y] School of Envi 更多
通讯作者地址：[Yue, QY]Shandong Univ, Sch Environm Sci & Engn, Num 27 ShanDaNanLu, Jinan 250100, Peoples R China.
来源：Water Environment Research
关键词：modified giant reed;phosphate;adsorption;kinetics;thermodynamics
摘要：The use of modified giant reed (MGR) as an adsorbent to remove phosphate from an aqueous solution was investigated. The dosage of MGR, pH of the phosphate solution, thermodynamics, and the effects of several factors on kinetics (concentration of phosphate solution, solution temperature, and shaking speed) were studied in batch experiments. The results showed that MGR was particularly effective to remove phosphate and that the effective pH range for the phosphate removal was between 4 and 9. The adsorption process could reach equilibrium in 25 minutes. Three kinetic models have been evaluated to fit the experimental data. It was shown that the pseudo-second-order model best described the adsorption kinetics of phosphate on MGR. The low activation energy of the adsorption suggested a physisorption process for phosphate adsorption. The equilibrium isotherm showed that the adsorption system was consistent with the Langmuir equation. The negative values of standard free energy (AG) and enthalpy (AH) indicated that the adsorption of phosphate onto MGR was a spontaneous and exothermic process.