稻壳吸附柱处理Cu2+废水的动态试验  

Dynamic Sorption of Cu(Ⅱ) from Waste Water by Rice Husk in Fixed Bed Column

作　　者：邓再芳[1] 罗学刚[1] 林晓艳[1] 

机构地区：[1]西南科技大学环境与资源学院

出　　处：《林产化学与工业》2010年第4期69-72,共4页Chemistry and Industry of Forest Products

基　　金：“十一五”国家科技支撑计划资助(2007BAB18B08)

摘　　要：主要研究稻壳对水中Cu2＋的吸附。以稻壳为填料,填入直径为3cm、长为50cm的吸附柱中,分别填入高为9、12、15cm的稻壳,让质量浓度为12mg/L的Cu2＋溶液,以10mL/min的速度连续流过吸附柱。穿透时间（ta）和耗竭时间（tb）随填料高度（h）增加而增加,其关系为：ta=0.15h-0.467,tb=0.15h＋0.639。质量浓度12mg/L的Cu2＋溶液,以不同流速,分别连续流过填料高度为15cm的稻壳柱,吸附带长（δ）随流速（V）的增加而增长,其关系式为δ=0.245V＋3.99,R2=0.992。动态实验研究表明：此稻壳对Cu2＋的吸附能较好地符合博哈特（Bohart）和亚当斯（Adams）方程式;在此稻壳吸附柱动态实验的基础上,发现此稻壳对Cu2＋有较好的吸附效果。流速在5～25mL/min之间,吸附容量为1.96～1.20mg/g。The column adsorption of rice husk to Cu2＋ in water was studied. Putting rice husk into glass column of a diameter 3cm, and a length of 50cm, with bed depths of 9, 12 and 15cm respectively. The column was eluted with Cu2＋ solution of 12 mg/L at 10 mL/min continuously. The breakthrough time（ta） and exhaust time（tb） were increased with the increase of bed length（h） under the correlation of ta=0.15h-0.467, tb=0.15h＋0.639. For the column of bed depth 15cm, Cu2＋solutions of 12 mg/L concentration at different flow rates were eluted respectively, the length of adsorption zone increased under the correlation of δ=0.245V＋3.99, R2=0.992. Research on dynamic test showed that adsorption of Cu2＋ by the rice husk could be described by Bohart-Adams model; and the material was found to be an efficient media for the removal of Cu2＋ in continuous mode using fixed bed column. Adsorption capacity reached 1.96-1.20 mg/g at flow rate from 5 to 25 mL/min.

关 键 词：稻壳 吸附柱 动力学 

分 类 号：TQ351[化学工程] TS79[轻工技术与工程—制浆造纸工程]