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首页> 外文期刊>RSC Advances >Enhancing the adsorption capability of areca leaf biochar for methylene blue by K2FeO4-catalyzed oxidative pyrolysis at low temperature
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Enhancing the adsorption capability of areca leaf biochar for methylene blue by K2FeO4-catalyzed oxidative pyrolysis at low temperature

机译：低温K2FeO4催化氧化热解的亚甲基蓝炭的吸附能力

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Catalytic oxidative pyrolysis is a promising method for the preparation of highly adsorptive biochar by introducing oxygen-containing groups. Here, a K _(2) FeO _(4) -catalyzed oxidative pyrolysis was described for enhancing the adsorption capability of areca leaf biochar toward methylene blue at low temperature. It was shown that the maximum adsorption capacity of the biochar pyrolyzed at 200 °C was greatly improved from 122.67 to 251.95 mg g ~(?1) with the catalysis of K _(2) FeO _(4) due to the introduction of surface oxygen-containing groups. In addition, a high adsorption capability was observed over a wide pH range for the K _(2) FeO _(4) -modified biochar and nearly neutral pH was obtained after adsorption, further demonstrating the great advantages of K _(2) FeO _(4) -catalyzed oxidative pyrolysis. Mechanistic studies revealed that the adsorption of the pristine biochar was mainly determined by hydrogen bonding and electrostatic interaction. Whereas, the adsorption of the K _(2) FeO _(4) -modified biochar was attributed to cation exchange besides hydrogen bonding and electrostatic interactions.
机译：催化氧化热解是通过引入含氧基团制备高度吸附生物炭的有希望的方法。这里，用于在低温下提高催化氧化热解，用于提高Areca叶Biochar的Areca叶Biochar的吸附能力。结果表明，200℃下热解的Biochar的最大吸附能力从122.67〜251.95mg g〜（β1）大大提高了K _（2）Feo _（4）的催化，这是由于表面的引入含氧基团。此外，在宽的pH范围内观察到高吸附能力，对于K _（2）Feo _（4） - 制定的生物炭，并且在吸附后获得几乎中性pH，进一步证明了K _（2）Feo的显着优点_（4） - 催化氧化热解。机械研究表明，原始Biochar的吸附主要由氢键和静电相互作用决定。然而，除了氢键和静电相互作用之外，k _（2）Feo _（4）-mo _（4）的吸附归因于阳离子交换。

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