《Desalination》杂志刊登“再生漂土对Kuhbonan区域的地下水除氟案例研究”

作  者：M. Malakootian, A. Fatehizadeh, N. Yousefi, M. Ahmadian, M. Moosazadeh

刊  物：《Desalination》，2011年，277卷第1-3期，244-249页

关键词：吸附等温线；吸附动力学；吸附能力；再生

摘  要：本着资源重复利用的原则，采用工业废料-漂土（SBE）作为吸附剂去除地下水中的氟化物。所采用的漂土（SBE）主要来源于石油工业废料，使用前采用酸和碱处理恢复活性。本文通过柱试验，研究了pH值、吸附剂投加量、起始氟浓度和接触时间等影响参数对SBE除氟效果的影响，试验用水选择伊朗南部克尔曼省的Kuhbonan地区的地下水。试验结果表明，随着吸附剂剂量的增加、接触时间的增长、pH值的升高，SBE吸附剂除氟效率升高。在pH=7.0，平衡时间为180min时，SBE吸附容量达到最大；随着起始氟浓度的升高，除氟效率下降。起始氟浓度2.5-8.0㎎/L、吸附剂投加量10g/L、pH=7.0的运行条件下，SBE吸附容量为0.6 mg/g。通过动力学试验表明，SBE吸附剂的吸附速率是0.64 mg/g•min0.5。针对伊朗南部克尔曼省的Kuhbonan地区的地下水，SBE吸附剂投加量10g/L时，出水氟化物浓度达到WHO的要求。

Fluoride removal using Regenerated Spent Bleaching Earth (RSBE) from groundwater: Case study on Kuhbonan water

Authors: M. Malakootian, A. Fatehizadeh, N. Yousefi, M. Ahmadian, M. Moosazadeh

Journal: Desalination, Volume 277, Number 1-3 (2011), 244-249

Key words: Adsorption isotherm; Adsorption kinetic; Adsorption capacity; Regeneration

Abstract: The aim of this study was to recover industrial waste (spent bleaching earth (SBE)) and use it as an adsorbent in fluoride removal from aqueous solution. Waste SBE was obtained from the oil industry, and acid and alkaline were used to recover it. Experiments were carried out in a batch system, and the effects of parameters including pH, adsorbent doses, fluoride initial concentration and contact time on the adsorption of fluoride using regenerated spent bleaching earth (RSBE) were examined. In addition, the optimum conditions obtained in this study were tested on Kuhbonan water. The results revealed that as the adsorbent dose, contact time and pH increased, the fluoride removal efficiency increased as well. The maximum fluoride adsorption was obtained at pH = 7 and an equivalent time of 180 min. Furthermore, when the fluoride initial concentration in water increased, fluoride removal efficiency decreased. The maximum adsorption capacity of RSBE was 0.6 mg/g fluoride (2.5–8 mg F⁻/L, 10 g RSBE/L and pH = 7). The kinetics analysis showed that the rate of fluoride adsorption on RSBE was 0.64 mg/g·min0.5. In addition, the results showed that when 10 g RSBE/L was added to Kuhbonan water, fluoride residual can reach levels allowable by WHO guidelines.

原文链接：http://www.sciencedirect.com/science/article/pii/S0011916411003572

翻译：孙瑞刚；审核：陈康宁