摘要
以污水厂的剩余污泥为原料,采用化学活化法制备污泥活性炭,全面研究了吸附时间、pH、温度和离子强度对污泥活性炭吸附罗丹明效果的影响,确定了三种温度下(25℃、35℃、45℃)的吸附等温模型和吸附动力学模型。结果表明:最佳吸附时间为25 h,此时吸附率达96.56%;35℃时吸附率效果最佳;碱性条件下吸附效果较好;离子强度对于吸附行为影响不大。其吸附规律可用Freundlich模型描述,其动力学参数符合伪二级动力学模型。
The excess sludge of the wastewater treatment plant as raw materials,using chemical activation prepared by sludge activated carbon.A comprehensive study of the adsorption time,pH,temperature,and ionic strength of sludge activated carbon adsorption of rhodamine.Studied at three different temperatures（25 ℃,35 ℃,45 ℃） adsorption isotherm model and adsorption kinetics model.The results showed that： the best adsorption time for 25 h,then the adsorption rate of 96.56 %.35 ℃ when the adsorption effect is the best.Adsorption effect is preferably under basic conditions.Ionic strength has little effect on the adsorption behavior.The Adsorption available Fruendlich model description.The kinetic parameters correspond to the pseudo-second-order kinetic equation.
出处
《广东化工》
CAS
2013年第15期3-4,6,共3页
Guangdong Chemical Industry
基金
国家水体污染控制与治理科技重大专项(2012ZX07205-002)
关键词
污泥活性炭
罗丹明
吸附等温线
吸附动力学
sludge activated carbon
Rhodamine
adsorption properties
adsorption kinetics
