Removal of Fluoride Ion by Bone Char Produced from Animal Biomass
Removal of Fluoride Ion by Bone Char Produced from Animal Biomass
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DOI：
10.5650/jos.58.529
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发表时间：
2009-10-01
影响因子：
1.5
通讯作者：
Yamaguchi, Isao
中科院分区：
文献类型：
--
作者：
Kawasaki, Naohito;Ogata, Fumihiko;Yamaguchi, Isao
通过碳化四种动物生物质制备骨炭（BC），并研究其对氟离子的吸附和磷酸根离子的洗脱。结果发现，随着碳化温度的升高，BC产率下降，并且碳化温度对表面pH值、碱或酸消耗没有显着影响。低碳化温度下生产的BC中氟离子吸附增加。 BCs对氟离子的吸附机制可能是单层吸附。 BC 有可能用于去除饮用水中的氟离子。然而，发现BC中的磷酸根离子由于氟离子的吸附而被洗脱，并且摄入大量的磷酸根离子会抑制人体内钙的重吸收。因此有必要研究磷酸根离子的洗脱行为。 BC上氟离子的吸附机理是BC上的物理吸附，BC中的磷酸根离子交换为氟离子。
Bone char (BC) was prepared by carbonizing four types of animal biomass, and the adsorption of fluoride ions and elution of phosphate ions were investigated. It was found that the BC yield decreased as carbonization temperature increased, and that carbonization temperature had no significant effect on surface pH, base or acid consumptions. Fluoride ion adsorption was increased in BC produced at a low carbonization temperature. The adsorption mechanism of fluoride ion on BCs might be monolayer adsorption. BC can potentially be used to remove fluoride ions in drinking water. However, it was found that phosphate ions from BC are eluted due to adsorption of fluoride ions, and that ingestion of large amounts of phosphate ions inhibits reabsorption of calcium in the human body. Thus there is a need to study the elution behavior of phosphate ions. The adsorption mechanisms of fluoride ions onto BC would be a physical adsorption onto BC and phosphate ion in BC is exchanged to fluoride ion.