摘要
研究了蔗渣焚烧灰改性和脱除焦糖色素色度条件并利用扫描电镜和比表面分析仪对其进行结构分析,结果表明：经过氢氧化钡溶液（Ba（OH）2）的改性后,蔗渣焚烧灰对焦糖色素的色度去除率提高了3倍多;改性后蔗渣焚烧灰对焦糖色素色度脱除的最优反应条件为在每50 m L标准焦糖色度溶液投加3 g改性后蔗渣焚烧灰,反应时间为30~60 min,反应p H在4~5左右可达到98%最高脱色率;经扫描电镜和比表面分析仪分析改性后蔗渣焚烧灰脱色能力提升主要源于Ba2＋的作用下孔架的结构强度得到提升,使比表面积较改性前增加了50.12%。
Bagasse ash modification and removal of caramel color conditions were studied, and the structure analysis experiments were carried out. It was found that the caramel color removal rate increased by about 3 times, after the bagasse ash modified by barium hydroxide solution. The decolorization rate can reach to 98% when 3 g modified bagasse ash added in 50 mL standard solution of caramel color, with reaction time 30-60 min and pH 4~5. The surface of modified bagasse ash were analyzed with the scanning electron microscopy and specific surface area analyzer, results showed that the decolorization ability of modified bagasse ash mainly came from the strength improving of structure hole frame under the action of Ba2＋, and the surface area of modified bagasse ash increased by 50.12% compared with initial bagasse ash.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2015年第5期44-47,174,共5页
Environmental Science & Technology
基金
广西科技攻关计划项目(桂科攻1355003-7)
广西高校科学研究项目(桂教科研[2013]7号)
关键词
蔗渣焚烧灰
改性
反应条件
比表面积
孔隙率
bagasse ash
modifying
reaction conditions
specific surface area
porosity
