摘要
探讨了改性粉煤灰处理含镍废水的影响因素，结果表明：改性粉煤灰的除镍性能与废水pH值、吸附时间、反应温度等因素有关。当pH小于7时，吸附起主导作用，随着pH值的升高，沉淀逐渐起主导作用。通过动力学及热力学研究表明：改性粉煤灰对含镍废水的吸附符合班厄姆吸附动力学方程及Langmuir吸附等温式，即符合单分子层吸附理论，且为自发、吸热过程。
The influence factors of the modified fly ash on removal of Ni^2 ＋ containing in wastewater were discussed. The results showed that the ability of the modified fly ash removing nickel depended on pH, contact time and temperature. When the pH 〈 7, the absorption played a leading role ; with the increasing of pH, the precipitation gradually played a leading role. The study of dynamics and thermodynamics showed that： the absorption of modified fly ash on removal of Ni^2＋ containing in wastewater accord with Bangham adsorption dynamic equation and Langmuir adsorption isotherm, and that squared with the single-molecule layer adsorption theory, also the spontaneous, endothermic process.
出处
《洁净煤技术》
CAS
2009年第2期97-100,共4页
Clean Coal Technology
基金
上海市重点学科建设项目资助(P1304)
关键词
吸附
热力学
动力学
吸附平衡
adsorption
thermodynamics
kinetics
equilibrium
