使用含铝化合物去除水中的氟化物。
Removal of fluoride from water using aluminium containing compounds.
机构信息
Department of Chemistry, Gandhigram Rural University, Gandhigram 624302, India.
出版信息
J Environ Sci (China). 2009;21(11):1513-8. doi: 10.1016/s1001-0742(08)62448-1.
Batch adsorption studies were undertaken to assess the suitability of aluminium titanate (AT) and bismuth aluminate (BA) to remove fluoride ions from water. The effect of pH, dose of adsorbent, contact time, initial concentration, co-ions and temperature on fluoride removal efficiency were studied. The amounts of fluoride ions adsorbed, at 30 degrees C from 4 mg/L of fluoride ion solution, by AT and BA were 0.85 and 1.55 mg/g, respectively. The experimental data fitted well to the Freundlich and Langmuir isotherms. Thermodynamic parameters such as deltaH0, deltaS0 and deltaG0 indicated that the removal of fluoride ions by AT was exothermic and non-spontaneous while that by BA was endothermic and spontaneous. Fourier transform infrared (FT-IR) analysis and X-ray diffraction (XRD) patterns of the adsorbent before and after adsorption indicated that fluoride ions were chemisorbed by these adsorbents.
进行了批量吸附研究，以评估铝钛酸盐（AT）和铝酸铋（BA）从水中去除氟离子的适宜性。研究了 pH 值、吸附剂用量、接触时间、初始浓度、共存离子和温度对氟去除效率的影响。在 30°C 下，从 4mg/L 的氟离子溶液中，AT 和 BA 吸附的氟离子量分别为 0.85 和 1.55mg/g。实验数据很好地符合 Freundlich 和 Langmuir 等温线。热力学参数如ΔH0、ΔS0 和ΔG0 表明，AT 去除氟离子是放热和非自发的，而 BA 去除氟离子是吸热和自发的。吸附前后吸附剂的傅里叶变换红外（FT-IR）分析和 X 射线衍射（XRD）图谱表明，氟离子被这些吸附剂化学吸附。
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