摘要
选用廉价的粉煤灰对焦化废水中的挥发酚吸附去除。考察了粉煤灰不同用量、吸附时间、初始pH、不同盐度和不同温度等条件对吸附的影响,讨论了粉煤灰对焦化废水中挥发酚的吸附特性和吸附机理。结果表明,焦化废水复杂体系中挥发酚在粉煤灰上的吸附规律更符合准二级动力学吸附模型和Langmuir等温模式。粉煤灰对挥发酚的最大平衡吸附量为39.5 mg/g,可以作为焦化废水的预处理手段,实现"以废治废"。
Low-cost fly ash has been used for the adsorptive removal of volatile phenols from coking wastewater. The effects of different fly ash dosages,adsorption time,initial pH,different salinities,different adsorption temperatures,etc. on adsorption are investigated. The adsorption mechanism and characteristics of volatile phenols in the complicated systems of coking wastewater treated by fly ash are investigated. The results indicate that the adsorption law of volatile phenols of the complicated systems of coking wastewater on fly ash fits the pseudo second order kinetics adsorption model and the Langmuir equilibrium isotherm model well. The maximum adsorption capacity of fly ash for volatile phenols is 39.5 mg/g. Therefore,fly ash could be used as a pretreatment measure for coking wastewater,realizing the idea ＂treating waste with waste＂.
出处
《工业水处理》
CAS
CSCD
北大核心
2015年第7期68-72,共5页
Industrial Water Treatment
关键词
粉煤灰
吸附
焦化废水
挥发酚
fly ash
adsorption
coking wastewater
volatile phenols
