凹凸棒石对水中亚甲基蓝的脱色研究

Decoloration Performance of Palygorskite to Methylene Blue

以亚甲基蓝为目标污染物,以凹凸棒石为吸附剂,研究煅烧温度、吸附温度、吸附时间和凹凸棒石用量对亚甲基蓝水溶液脱色性能的影响。结果表明,煅烧温度、吸附温度、吸附时间和凹凸棒石用量是凹凸棒石吸附亚甲基蓝的重要影响因素。在煅烧温度为350℃时,亚甲基蓝水溶液的脱色率可达69%;随吸附时间的延长,凹凸棒石对水溶液中亚甲基蓝的脱色率增大,吸附时间超过30 min后,凹凸棒石吸附即可达到平衡;随吸附温度的升高,凹凸棒石对亚甲基蓝水溶液的脱色率呈上升趋势;随凹凸棒石用量的增加,水中亚甲基蓝的脱色率随之增大,在投加量为1.0-1.5 g时,单位质量纯凹凸棒石对亚甲基蓝的吸附量较高。

Effects of calcination temperature, adsorption temperature, adsorption time and amount of palygorskite on adsorption properties to methylene blue were investigated with playgorskite as adsorbent. The results suggested that the decoloration rate of methylene blue solution increased and then decreased with increase of calcination temperature, and that the decoloration rate was as high as 69% when calcination temperature was 350 ℃. The decoloration rate of methylene blue solution increased with the rise of adsorption temperature or the passage of adsorption time or amounts of palygorskite. The adsorption capacity of playgorskite was saturated after adsorption for 30 minutes. When dosage of playgorskite ranged from 1.0--1.5 g, the adsorption capacity of each unit weight playgorskite was better than that of others.