《氟化学杂志》刊登“使用酸化处理的废白土从水溶液中吸附氟”

作者: M Mahramanlioglu, I Kizilcikli, I.O Bicer

杂志：Journal of Fluorine Chemistry, 2002年5月,115卷第1期,41-47

关键词：氟化物；吸附；废白土；去除氟；废水处理；质量转移；粒内扩散；吸附动力学

中文摘要：研究评价酸化处理的废白土从水溶液中吸附氟的能力。吸附等温线符合朗缪尔和弗伦德里希方程模型，从而计算两个等温线的等温线常数。研究吸附剂浓度对吸附效果的影响。研究吸附氟的效果对水溶液pH值的依赖性以确定吸附氟的最佳pH值和更好的吸附机理。结果发现在pH值为3.5时水溶液中吸附氟的量达到最大值。使用二阶方程去描述计算出氟吸附速率和吸附速率常数。计算了粒子内和质量的迁移系数。同时进行添加阴离子对吸附氟效果影响的研究，以模拟工业废水添加阴离子降低酸化废白土（SBE）吸附氟的效果。

Adsorption of fluoride from aqueous solutionby acid treated spent bleaching earth

Authors：M Mahramanlioglu, I Kizilcikli, I.O Bicer

Journal: Journal of Fluorine Chemistry,28 May 2002, Volume: 115; Issues: 1,41-47

Key words：Fluoride; Adsorption; Spent bleaching earth; Fluoride removal; Waste water treatment; Mass transfer; Intraparticle diffusion; Adsorption kinetics

Abstract: Acid treated spent bleaching earth was studied to assess its capacity for the adsorption of fluoride from aqueous solutions.Adsorptionisotherms have been modeled by Langmuir and Freundlich equations and isotherm constants for both isotherms were calculated.The effect ofthe adsorbent concentration on the adsorption was studied. The dependence of the adsorption of fluoride on the pH of the solution has beenstudied to achieve the optimum pH-value and a better understanding of the adsorption mechanism. It has been found that maximum adsorptionof fluoride from aqueous solutions takes place at pH-value of 3.5. Second-order equation was used to describe the adsorption rate of fluorideand adsorption rate constant was calculated. Intraparticle and mass transfer coefficients were calculated. The influence of addition of theanions on the adsorption of fluoride was also studied to simulate industrial waste waters and the addition of anions decreased the adsorption offluoride on the acid treated spent bleaching earth (SBE).

原文链接：http://www.sciencedirect.com/science/article/pii/S0022113902000039