《Journal of Environmental Management》杂志刊登“连续流电凝聚反应器对氟的去除”

作  者：Mohammad M. Emamjomeh, Muttucumaru Sivakumar

刊  物：《Journal of Environmental Management》，2009年，90卷第2期，1204-1212页

关键词：电化学；化学反应器；电凝聚反应器；氟化物去除

摘  要：长期饮用高氟地下水，引起氟斑牙和氟骨症。电凝聚是一种电化学技术，用于去除水溶液中悬浮物及有害物质。本文采用单级铝电极进行除氟试验，研究了电流密度（12.5-50A/m²）、流速(150–400mL/min)、pH值（4-8）、起始氟浓度（5-25mg/L）等运行参数对除氟效果的影响。试验结果表明，当pH值为6-8时，电凝聚处理效率高，除氟效果主要取决于电流密度、流速、和初始氟浓度。采用X射线光谱分析所产生沉淀物的成分。在上述运行条件下，沉淀成分中含量较高的是Al(OH)₃，表明电凝聚除氟的主要机理是氟和铝形成氟铝络合物[Al_nF_m(OH)_3n-m]。试验结果表明电凝聚是一种有效可靠的饮用水除氟方法，并且也可以应用于工业废水除氟。

Fluoride removal by a continuous flow electrocoagulation reactor Authors:

Mohammad M. Emamjomeh, Muttucumaru Sivakumar

Journal: Journal of Environmental Management, Volume 90, Number 2 (2009), 1204-1212

Key words: Electrochemistry; Chemical reactors; Electrocoagulation reactor; Fluoride removal

Abstract: Long-term consumption of water containing excessive fluoride can lead to fluorosis of the teeth and bones. Electrocoagulation (EC) is an electrochemical technique, in which a variety of unwanted dissolved particles and suspended matter can be effectively removed from an aqueous solution by electrolysis. Continuous flow experiments with monopolar aluminium electrodes for fluoride removal were undertaken to investigate the effects of the different parameters such as: current density (12.5–50 A/m²), flow rate (150–400 mL/min), initial pH (4–8), and initial fluoride concentration (5–25 mg/L). The highest treatment efficiency was obtained for the largest current and the removal efficiency was found to be dependent on the current density, the flow rate and the initial fluoride concentration when the final pH ranged between 6 and 8. The composition of the sludge produced was analysed using the X-ray diffraction (XRD) spectrum. The strong presence of the aluminium hydroxide [Al(OH)₃] in the above pH range, which maximizes the formation of aluminium fluoride hydroxide complex [Al_nF_m(OH)_3n−m], is the main reason for defluoridation by electrocoagulation. The results obtained showed that the continuous flow electrocoagulation technology is an effective process for defluoridation of potable water supplies and could also be utilized for the defluoridation of industrial wastewater.

原文链接：http://www.sciencedirect.com/science/article/pii/S0301479708001552