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生物基质活性炭对挥发性有机物的吸附

Keywords: 咖啡渣,柚子皮,活性炭,挥发性有机物,吸附

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Abstract:

以咖啡渣和柚子皮生物基质为原料用磷酸活化法制成活性炭,探讨了制备条件对活性炭制备的影响,并研究了其对正丁烷的吸附行为。磷酸活化过程中磷酸的用量为生物基质质量的1.5倍为宜,咖啡渣采用超声干燥法,柚子皮采用水热法制备。制备的活性炭对正丁烷均有较好的吸附能力,以柚子皮为原料、磷酸用量为原料质量两倍活化制成的活性炭吸附性能最佳,最大吸附量约为商用活性炭的2倍。吸附剂均能较好地与兰格缪尔曲线相拟合,计算了不同正丁烷覆盖度下的等量吸附热,其变化规律与吸附曲线变化规律相一致。

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