溶剂气浮法去除水中的刚果红的研究

以十六烷基三甲基溴化铵为表面活性剂, 与阴离子型染料刚果红形成缔合物, 对该缔合物的溶剂气浮过程进行研究. 研究多种参数对溶剂气浮过程的影响, 如气浮速率、共存溶质的量、pH等参数对溶剂气浮去除率的影响. 研究表明表面活性剂与染料的物质的量之比为2∶1, 约24 min水中刚果红的去除率可达97%;NaCl会大大降低溶剂气浮的去除率;溶剂气浮的速率随着气流速率的增加而增加, 但高速率反而降低溶剂的去除率;共存溶质乙醇存在会使去溶剂去除率降低, 有机溶剂的量对溶剂气浮影响较小;pH中性去除率最佳;考察了不同温度下溶剂气浮的热力学及动力学, 研究表明, 溶剂气浮过程遵从一级动力学, 计算了该过程中的气浮表观活化能为7.48 kJ/mol.

Studies on the removal of congo red from water by solvent sublation

A study of dye-surfactant ion complexes,Congo red(CR),an anionic dye,with Cetyltrimethyl ammonium bromide(CTAB) complex,is carried out.The effects of many parameters,such as airflow rates,electrolytes(e.g.NaCl),non-hydrophobic organics(e.g.ethanol),and pH were studied.The mole ratio of surfactant to the dye is the most effective for the removal,with over 97% of the dye removed from the aqueous solution in 24 min by solvent sublation.NaCl greatly decreased the removal efficiency of the solvent sublation.Different temperatures of the solvent sublation were investigated.The solvent sublation process followed first order kinetics.A characteristic parameter,apparent activation energy of attachment of the sublation to bubbles,was estimated at a value of 7.48 kJ/mol.