Changes in fluoride removal ability of chicken bone char with changes in calcination time
Changes in fluoride removal ability of chicken bone char with changes in calcination time
复制标题
鸡骨炭除氟能力随焙烧时间变化的变化
DOI：
10.1002/ces2.10034
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Irie Mitsuteru
中科院分区：
文献类型：
--
作者：
Kikuchi Masanori;Arioka Yuki;Tafu Masamoto;Irie Mitsuteru
通过测定鸡骨炭（CBC）中含碳量（包括有机物）和羟基磷灰石晶粒大小来研究CBC除氟能力的变化。CBC中的碳含量通过在600°C下的加热时间来控制。尽管HAp的晶粒生长温度650°C高于600°C，但CBC中HAp的微晶尺寸随着加热时间而增加。氟离子去除能力与HAp的残碳量呈正相关，与HAp的晶粒尺寸平方呈负相关。这些结果表明，CBC从水中去除氟离子不仅是通过离子交换和/或溶解-沉淀过程，而且还通过碳吸附和/或在磷灰石结构中沉淀之前通过CBC中碳酸盐的微观结构暂时捕获氟离子。
Changes in fluoride removal ability of chicken bone char (CBC) were investigated by both remained amounts of carbon including organic substances and crystallite size of hydroxyapatite in the CBC. Carbon contents in CBC were controlled by heating time at 600°C. Although temperature for crystal‐grain growth for HAp, 650°C, was higher than 600°C, crystallite size of HAp in CBC increased with heating time. Fluoride ion removal ability positively related to the amount of remaining carbon and negatively related to the square of crystallite size, as an index of surface area, of HAp. These results suggested that fluoride ion removal from water by CBC is not only by ion exchange and/or dissolution‐precipitation process, but also by adsorption by carbon and/or temporal capture of fluoride ion by microstructure of carbonate in CBC before immobilize it in apatite structure.