《Water Research》杂志刊登“使用颗粒状氢氧化铁（GFH）从水溶液中除氟”

作  者：Eva Kumar, Amit Bhatnagar, Minkyu Ji, Woosik Jung, Sang-Hun Lee, Sun-Joon Kim, Giehyeon Lee, Hocheol Song, Jae-Young Choi, Jung-Seok Yang, Byong-Hun Jeon

刊  物：《Water Research》，2009年，43卷第2期，490-498页

关键词：除氟；颗粒状氢氧化铁（GFH）；吸附等温线；动力学模型；pH；温度影响；竞争离子

摘  要：本研究旨在评价使用颗粒状氢氧化铁（GFH）从水溶液中去除氟的可行性。进行动态试验研究，诸如接触时间（1min-24h）、初始氟浓度（1-100mg L^-1）、温度（10和25ºC）、pH（3-12）不同试验参数的影响，和GFH吸附氟时存在竞争的离子。动力学数据显示，开始时氟化物的吸附速率很快，95%的吸附是在10min之内完成的，而吸附平衡在60min内实现。吸附过程可以很好的使用伪一级反应和孔扩散模型解释。GFH对氟化物的最大吸附容量为7.0mg g^-1。同时发现吸附是一个吸热的过程，并且数据与朗缪尔模型吻合。在pH值处于4-8之间时最适宜氟的去除。磷酸盐的存在会降低氟化物的吸附容量，其次是碳酸盐和硫酸盐。研究结果证实GFH具有成为一种饮用水除氟可行技术的潜在可能性。

Defluoridation from aqueous solutions by granular ferric hydroxide (GFH)

Authors: Eva Kumar, Amit Bhatnagar, Minkyu Ji, Woosik Jung, Sang-Hun Lee, Sun-Joon Kim, Giehyeon Lee, Hocheol Song, Jae-Young Choi, Jung-Seok Yang, Byong-Hun Jeon

Journal: Water Research, Volume 43, Number 2 (2009), 490-498

Key words: Defluoridation; Granular ferric hydroxide (GFH); Adsorption isotherms; Kinetic modeling; pH; Temperature effect; Competing anions

Abstract: This research was undertaken to evaluate the feasibility of granular ferric hydroxide (GFH) for fluoride removal from aqueous solutions. Batch experiments were performed to study the influence of various experimental parameters such as contact time (1 min-24 h), initial fluoride concentration (1-100 mg L^-1), temperature (10 and 25 ºC), pH (3-12) and the presence of competing anions on the adsorption of fluoride on GFH. Kinetic data revealed that the uptake rate of fluoride was rapid in the beginning and 95% adsorption was completed within 10 min and equilibrium was achieved within 60 min. The sorption process was well explained with pseudo-first-order and pore diffusion models. The maximum adsorption capacity of GFH for fluoride removal was 7.0 mg g^-1. The adsorption was found to be an endothermic process and data conform to Langmuir model. The optimum fluoride removal was observed between pH ranges of 4-8. The fluoride adsorption was decreased in the presence of phosphate followed by carbonate and sulphate. Results from this study demonstrated potential utility of GFH that could be developed into a viable technology for fluoride removal from drinking water.

原文链接：http://www.sciencedirect.com/science/article/pii/S0043135408004910