环境化学
姜良艳,周仕学,王文超,吴峻青,卢国俭.活性炭负载锰氧化物用于吸附甲醛[J].环境科学学报,2008,28(2):337-341
活性炭负载锰氧化物用于吸附甲醛
- Adsorption of formaldehyde by activated carbon loaded with manganese oxides
- 基金项目:国家自然科学基金项目(No50574054);教育部留学回国人员科研基金项目(No2005383)
- 姜良艳
- 山东科技大学化学与环境工程学院, 青岛 266510
- 周仕学
- 山东科技大学化学与环境工程学院, 青岛 266510
- 王文超
- 山东省煤田地质局山东煤炭质量检测中心, 泰安 271000
- 吴峻青
- 山东科技大学化学与环境工程学院, 青岛 266510
- 卢国俭
- 山东科技大学化学与环境工程学院, 青岛 266510
- 摘要:以活性炭为载体,利用浸渍法将KMnO4负载在活性炭上,再经热处理使其转化为锰氧化物(MnOx).研究了KMnO4溶液浓度和热处理温度对负载MnOx活性炭吸附甲醛效果的影响.结果表明,在KMnO4溶液浓度为0.079mol·L-1和热处理温度为650℃的条件下制得的负载MnOx活性炭,在浓度为600mg·L-1甲醛溶液中的甲醛吸附量可高达5.51mg·g-1.X射线光电子能谱(XPS)和傅立叶变换红外光谱(FTIR)测试表明,负载MnOx活性炭表面的碳原子和锰原子可对甲醛产生化学吸附.
- Abstract:KMnO4 was loaded on activated carbon by soaking and then was converted into manganese oxides (MnOx) by heat-treatment. The effects of KMnO4 concentration and heat-treatment temperature on the formaldehyde adsorption capacity of the activated carbon loaded with MnOx were studied. The experimental results showed that the adsorption capacity of activated carbon soaked in 0.079 mol·L-1 KMnO4 solution and subsequently heat-treated at 650 ℃ was up to 5.51 mg·g-1from a 600 mg·L-1 formaldehyde solution. The XPSand FTIRanalyses suggested that formaldehyde was chemisorbed by the carbon and manganese atoms on the surface of the MnOx-loaded activated carbon.
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