The activated red mud adsorbent was prepared with red mud as raw material and sodium dodecyl benzene sulfonate as ac-tivating agent. The adsorption behavior of activated red mud on methylene blue(MB)dye wastewater had been investigated. The re-sult showed that the adsorption efficiency of methylene blue increased on activated red mud. The adsorption efficiency of MB could get 90％in the condition of contact time 15min,activated red mud dosage 6g·L-1 in neutral solution. The adsorption fitted with Langmuir and Freundlich adsorption isotherm,and the maximum capacity was 16. 37mg·g-1 . The adsorption of methylene blue on activated red mud was exothermal reaction,the low temperature was beneficial to the methylene blue adsorption.%以赤泥为原料,十二烷基苯磺酸钠为活化剂,制备出活化赤泥吸附剂,并对亚甲基蓝(MB)染料废水吸附性能进行研究.结果表明,活化赤泥对亚甲基蓝的吸附效果有一定提高.振荡时间15min,活化赤泥6g·L-1,中性条件下,对40mg·L-1亚甲基蓝吸附率可达90％.吸附符合Langmuir和Freundlich吸附等式,最大吸附量为16.37mg·g-1.活化赤泥吸附亚甲基蓝为放热反应,低温利于亚甲基蓝吸附.
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