Resource recovery of waste incineration fly ash: Synthesis of tobermorite as ion exchanger
Resource recovery of waste incineration fly ash: Synthesis of tobermorite as ion exchanger
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垃圾焚烧飞灰的资源化：合成雪硅钙石作为离子交换剂
DOI：
10.1557/jmr.1999.0601
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发表时间：
1999
影响因子：
2.7
通讯作者：
M. Miyake
中科院分区：
文献类型：
--
作者：
Z. Yao;C. Tamura;M. Matsuda;M. Miyake
以垃圾焚烧飞灰为原料，在氢氧化钠溶液存在下，采用水热法成功合成了托贝莫来石。雪硅钙石合成作为反应温度，时间和NaOH浓度的函数进行了检查。在180 °C下用NaOH处理的所有粉煤灰中鉴定出雪硅钙石的形成，随后随着NaOH浓度的增加和反应时间的延长，少量生成方钠石和钙霞石相。NaOH处理的粉煤灰表现出对Cs^+和NH_4 ^+的吸收行为，而未经NaOH处理的粉煤灰则表现出对Cs ^+和NH_4 ^+的吸收行为。在180 °C下用2.0 M NaOH处理飞灰20 h，测得产物的吸收量：Cs^+为0.40 mmol/g，NH_4 ^+为0.35 mmol/g。
Tobermorite was synthesized successfully from waste incineration fly ash by hydrothermal treatment in the presence of sodium hydroxide solution. The tobermorite synthesis was examined as a function of reaction temperature, time, and NaOH concentration. The formation of tobermorite was identified in all of the fly ash treated with NaOH at 180 °C, followed by the minor generations of sodalite and cancrinite phases with increasing NaOH concentration and extending reaction time. The NaOH-treated fly ash revealed the uptake behaviors for Cs^+ and NH_4 ^+, whereas the fly ash untreated with NaOH solution did not show that. The uptake amounts of resulting products were also determined: 0.40 mmol/g for Cs^+ and 0.35 mmol/g for NH_4 ^+ in the fly ash treated with 2.0 M NaOH at 180 °C for 20 h.