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核桃壳活性炭对靛蓝的吸附

WANG Yan,FAN Xiaoyuan,XU Jingjing, GUO Xian, WANG Fang

Textile Auxiliaries(2022)

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Abstract
以核桃壳为原料,采用磷酸活化法制备核桃壳活性炭,表征活性炭对亚甲基蓝的吸附值、孔结构和表面形貌,考察吸附剂用量、吸附时间和pH对吸附效果的影响,并对吸附机理进行分析.结果表明,AC2颗粒大小不一,表面光滑,亚甲基蓝吸附值、比表面积和孔体积分别为16 mL/0.1 g、1127.8 m2/g、1.077 cm3/g.在酸性、AC2用量0.25 g、吸附时间90 min的条件下处理20 mL 1 mmol/L靛蓝溶液,靛蓝的脱色率达到99.82%,处理效果较好.AC2对靛蓝的吸附符合准二级动力学方程,吸附过程较好地符合了Langmuir吸附等温模型.
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