摘要
对粉煤灰进行热改性,用于吸附水中Cu(Ⅱ)。结果表明,改性后的粉煤灰对水中Cu(Ⅱ)的吸附性能提高。吸附动力学符合拟二级动力学模型,吸附过程受外扩散和颗粒内扩散共同控制。吸附等温线能很好地用Freundlich模型拟合,293~313 K下,MFA对Cu(Ⅱ)的最大理论吸附量为21.55~42.55 mg/g。热力学研究表明,Cu(Ⅱ)的吸附是自发的吸热反应,吸附方式为物理化学吸附。
The thermally modified fly ash was applied to adsorb Cu(Ⅱ)in the solution.Compared with the original fly ash,the modified fly ash showed an improved adsorption performance.The adsorption kinetic data was fitted well to the pseudo-second-order kinetic model.The adsorption process was controlled by external diffusion and intraparticle diffusion.The adsorption isotherm could be described by Freundlich model.The maximum adsorption capacity was increased from 21.55 mg/g(293 K)to 42.55 mg/g(313 K).Thermodynamic studies showed that the adsorption reaction was spontaneous and endothermic.The adsorption of Cu(Ⅱ)on MFA was the physicochemical adsorption process.
作者
骆欣
杨怡心
徐东耀
LUO Xin;YANG Yi-xin;XU Dong-yao(School of Chemical and Environmental Engineering,China University of Mining&Technology,Beijing 100083,China;School of Chemical Environmental Engineering,North China Institute of Science&Technology,Beijing 101601,China;School of Safety Engineering,North China Institute of Science&Technology,Beijing 101601,China)
出处
《应用化工》
CAS
CSCD
北大核心
2020年第9期2242-2245,2251,共5页
Applied Chemical Industry
基金
国家自然科学基金项目(61472137)
河北省科技计划项目(18273619)
中央高校基本科研业务费项目(3142014017)。
