不同类型骨炭对氟化物的吸附机制和吸附容量的评价。
Evaluation of Fluoride Adsorption Mechanism and Capacity of Different Types of Bone Char.
机构信息
International Postgraduate Program in Environmental and Hazardous Waste Management, Graduate School, Chulalongkorn University, Bangkok 10300, Thailand.
Faculty of Environment and Resource Studies, Mahidol University, Nakhon Pathom 73170, Thailand.
出版信息
Int J Environ Res Public Health. 2021 Jun 26;18(13):6878. doi: 10.3390/ijerph18136878.
The fluoride adsorption capacity of three types of bone char (BC), including cow BC (CBC), chicken BC (CKBC), and pig BC (PBC), was examined. At the optimum charring conditions (temperature and time), PBC had the highest hydroxyapatite (HAP) content (0.928 g-HAP/g-BC), while CBC had the highest specific surface area (103.11 m/g-BC). CBC also had the maximum fluoride adsorption capacity (0.788 mg-F/g-HAP), suggesting that fluoride adsorption capacity depends more on the specific surface area of the BC than the HAP content. The adsorption data of CBC, CKBC, and PBC fit well with the pseudo-second-order model and the Langmuir isotherm. The maximum fluoride adsorption capacity of BC reached the maximum value when the solution had a pH of approximately 6.0. Lastly, the highest fluoride desorption occurred when the BCs were soaked in solutions with a pH higher than 11.0.
研究了 3 种类型的骨炭（BC），包括牛骨炭（CBC）、鸡骨炭（CKBC）和猪骨炭（PBC）对氟的吸附能力。在最佳炭化条件（温度和时间）下，PBC 具有最高的羟基磷灰石（HAP）含量（0.928 g-HAP/g-BC），而 CBC 具有最高的比表面积（103.11 m/g-BC）。CBC 还具有最大的氟吸附能力（0.788 mg-F/g-HAP），这表明氟的吸附能力更多地取决于 BC 的比表面积，而不是 HAP 的含量。CBC、CKBC 和 PBC 的吸附数据均很好地符合伪二级动力学模型和 Langmuir 等温线。当溶液的 pH 值约为 6.0 时，BC 的最大氟吸附容量达到最大值。最后，当 BC 浸泡在 pH 值高于 11.0 的溶液中时，氟的解吸量最高。
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