摘要
采用镁盐与亚铁盐混合复配对活性染料印染废水进行脱色处理。考察该复合混凝剂的组分配比、pH值和投加量对脱色率的影响,并与单一组分混凝剂的脱色效果作对比,同时初步分析了复合混凝剂的脱色机理。结果表明:复合混凝剂MgSO4-FeSO4.7H2O的脱色效果明显优于单一组分,表现出显著的协同效应;对于80 mg/L的活性黑KN-B印染废水(色度为1000倍),在复合混凝剂投加量为556 mg/L、pH值在10.9左右时,脱色率可以达到99.07%;主要脱色机理表现为镁盐和亚铁盐在高pH值的环境下共沉淀生成氢氧化物絮状物吸附溶液中的染料分子一起沉降。该吸附主要为电中和吸附。吸附等温线符合Langmu ir方程,复合吸附剂的饱和吸附量达1.1614 g/g。
Decoloration of reactive dye wastewater by coagulant blended with magnesium salt and ferrite is studied. The optimum unit ratio of the blend coagulant is investigated. The effects of pH and the blend coagulant dosages are studied. Also, the decoloration efficiency of the blend coagulant and the one of its each unit is compared. The mechanism of the decoloration is studied, too. The results show that the decoloration efficiency of the coagulant blended with MgSO4 and FeSO4 · 7H2O is better than the one of MgSO4 or FeSO4 · 7H2O. The decoloration rate reaches 99.07% treating reactive black KN-B dye wastewater, dosage of which is 80 mg/L and color of which is 1000 times, under the appropriate conditions of pH 10.9 and the blend coagulant dosage of 556 mg/L. The mechanism of the decoloration is due to the neutralization-adsorption. The data are confirmed with the Langmuir isotherm equation and the saturation adsorbing capacity of blend sorbent of 1. 1614 g/g is achieved.
出处
《环境污染治理技术与设备》
CSCD
北大核心
2006年第2期93-96,共4页
Techniques and Equipment for Environmental Pollution Control
基金
福建省自然科学基金资助项目(E0210022)
关键词
活性染料
脱色
复合混凝剂
吸附
reactive dye wastewater
decoloration
blend coagulant
adsorption
