水利水电技术2017，Vol.48Issue(3)：93-98,6.DOI:10.13928/j.cnki.wrahe.2017.03.017
无定形氢氧化铝吸附剂的制备及其除氟性能研究
Study on preparation of amorphous aluminum hydroxide adsorbent and its fluoride removal performance
摘要
Abstract
The defluoridation measure has an important significance for the safety of the resident drinking water.The technique of fluoride removal with adsorption method is widely used,but it has the difficulty to be adaptable to the partial acid environment.By taking enhancing the adaptability of the pH value of high-fluorine groundwater as the objective,the amorphous aluminum hydroxide adsorption materials are prepared through controlling the pH value during the reaction process,the adsorption isotherm,adsorption kinetics,pH adaptability,competing ion,reusable performance and adsorption mechanism of amorphous aluminum hydroxide adsorbent are tested.The result shows that the adsorption of fluoride ion from the amorphous aluminum hydroxide belongs to the favorable adsorption,and the maximum adsorption capacity of Langmuir is 166.67 mg/g.Compared with the conventional adsorption materials of Al203,the amorphous aluminum hydroxide adsorption materials can slow down the lowering rate of the fluoride removal effect,and then the adaptability of pH value can be enhanced.The fluoride removal rate is decreased along with the increases of the ion concentrations of HCO3-,CO23-,P034-etc.in the solution.When the initial fluoride concentration is 5.00 mg/L,the amorphous aluminum hydroxide adsorbent can be reused for five cycles.Therefore,the improvement of the preparing process of the aluminum adsorption material can significantly enhance the adsorption performance and the adaptability of high-fluorine groundwater,which is an important tendency for the development and improvement of the adsorption materials concerned.关键词
无定形氢氧化铝/pH值/氟浓度/吸附/氟去除率/高氟地下水/饮水安全Key words
amorphous aluminum hydroxide/pH value/fluoride concentration/adsorption/fluoride removal rate/high-fluorine groundwater/drinking water safety分类
建筑与水利引用本文复制引用
李连香,刘文朝,孙瑞刚,李铁光..无定形氢氧化铝吸附剂的制备及其除氟性能研究[J].水利水电技术,2017,48(3):93-98,6.基金项目
重大水专项“农村饮用水安全保障技术标准化研究及规模化应用示范”(2015ZX07402003) （2015ZX07402003）
