摘要
为了用廉价吸附剂去除有色污水中的染料,提出用焙烧或酸洗对硅藻土、粉煤灰及膨润土进行改性.研究了改性前后三种吸附剂材料的性能变化,比较了它们对阳离子、酸性、活性染料溶液及印染污水的处理效果.结果表明,硅藻土的染料吸附效果和对污水化学需氧量(COD)的去除力均比粉煤灰及膨润土高.改性前硅藻土及膨润土对阳离子染料吸附力大于阴离子染料,粉煤灰与此相反.硅藻土450℃焙烧后大部分有机杂质被去除,对染料的吸附性能获得提高.粉煤灰酸洗后对阳离子染料吸附能力提高,对酸性及活性染料的吸附能力降低.膨润土酸洗后对阳离子、酸性染料的吸附性能提高,对活性染料降低.
To remove dyes from colored wastewater using low cost absorbents, raw diatomite, fly ash and bentonite were modified by heat or acid treatment. The characteristics of raw and modified absorbents were studied, and their ability to remove dyes from cationic, acidic, reactive dye solutions and textile wastewater were compared. The results show that the dye absorption and elimination capabilities for chemical oxygen demand （COD） of diatomite are higher than bentonite and fly ash. Diatomite and bentonite before modification has higher cationic dye absorption ability than anionic dyes, while fly ash has the contrary. The organic impurity of diatomite enhances the dye absorption capability when most of the organic impurity are removed after calcining at 450℃. Acid treatment of fly ash increases adsorption capability for cationic dye, but decreases the capability for acid and reactive dye. Acid treatment of bentonite increases adsorption capability for cationic and acid dyes, but decreases the capability for reactive dyes.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2006年第12期2031-2036,2062,共7页
Journal of Zhejiang University：Engineering Science
基金
浙江省重大科技攻关资助项目(2004C11020)
