Chatterjee Somak, Jha Sanjay, De Sirshendu
a Department of Chemical Engineering , Indian Institute of Technology , Kharagpur , West Bengal , India.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2018 Jul 29;53(9):832-846. doi: 10.1080/10934529.2018.1455378. Epub 2018 Apr 13.
Low cost naturally available bone meal was carbonized and its fluoride adsorption capacity was explored. Carbonized bone meal (CBM) produced at 550°C, 4 h carbonization time and a heating rate of 60°C/min, showed fluoride adsorption capacity of 14 mg g. Adsorbent was characterized using scanning electron microscopy, X-ray diffraction, X-ray fluoroscence, thermogravimetric analysis and Fourier transform infrared spectroscopy to highlight its physical and chemical properties. Best fluoride uptake capacity was observed for 0.2 mm particle size, 7 g L adsorbent concentration and at pH 6.5. Fluoride uptake was endothermic and chemisorption in nature. Effective diffusivity and mass transfer coefficient were obtained as 6 × 10 m s and 9 × 10 m s from shrinking core model. Sulphate and carbonate showed the highest interference effect on adsorption of fluoride by CBM. Maximum desorption was observed at basic pH (pH 12). Fixed bed study was performed and effect of different parameters (bed height, inlet flow rate and initial concentration) was investigated. Efficiency of the adsorbent using real life fluoride contaminated groundwater solution was also observed.
对低成本且天然可得的骨粉进行碳化处理，并探究其氟吸附能力。在550°C、碳化时间4小时以及加热速率60°C/分钟的条件下制备的碳化骨粉（CBM），其氟吸附能力为14毫克/克。使用扫描电子显微镜、X射线衍射、X射线荧光、热重分析和傅里叶变换红外光谱对吸附剂进行表征，以突出其物理和化学性质。对于粒径0.2毫米、吸附剂浓度7克/升以及pH值为6.5的情况，观察到最佳的氟吸收能力。氟吸收本质上是吸热的且为化学吸附。根据收缩核模型，有效扩散率和传质系数分别为6×10米/秒和9×10米/秒。硫酸盐和碳酸盐对CBM吸附氟的干扰作用最大。在碱性pH值（pH 12）下观察到最大解吸。进行了固定床研究，并考察了不同参数（床层高度、入口流速和初始浓度）的影响。还观察了该吸附剂对实际受氟污染的地下水溶液的使用效率。
