Adsorption of residual amine collector HAY from aqueous solution by refined carbon from coal fly ash and activated carbon  

作　　者：李显波 叶军建 邱跃琴 李龙江 卯松 刘志红 张覃 

机构地区：[1]College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China [2]Mining College,Guizhou University,Guiyang 550025,China [3]National&Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas,Guizhou University,Guiyang 550025,China [4]Guizhou Key Lab of Comprehensive Utilization of Non-metallic Mineral Resources,Guizhou University,Guiyang 550025,China

出　　处：《Journal of Central South University》2017年第1期30-38,共9页中南大学学报（英文版）

基　　金：Projects(2013BAB07B03,2013BAC15B01)supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China;Project(51264005)supported by the National Natural Science Foundation of China;Project(Qiankehejz[2014]2009)supported by the Key Foundation of Science and Technology of Guizhou Province,China;Project([2013]019)supported by“125”Major Special Project of Guizhou Province,China

摘　　要：Refined carbon(RC) derived from coal fly ash(CFA) as well as powdered activated carbon(PAC) was investigated as adsorbent to remove residual amine collector HAY from aqueous solution.The RC and PAC were characterized by scanning electron microscopy(SEM),surface area measurement,Zeta potential measurement and Fourier transform infrared(FTIR) spectroscopy.The effect factors and mechanisms of HAY adsorption onto RC and PAC were studied in detail.The results show that the experimental kinetic data agree well with the pseudo second-order equation,and the Langmuir isotherm model is found to be more appropriate to explicate the experimental equilibrium isotherm results than the Freundlich model.The adsorption capacities of PAC and RC increase with pH.It is found that alkaline condition is conducive to the adsorption of HAY onto PAC and RC and the adsorption efficiency of RC is close to PAC at pH near 11.Zeta potential variation of adsorbents suggests that HAY generates electrostatic adsorption onto RC and PAC.FTIR analysis shows that the adsorption is dominantly of a physical process.The Box-Behnken design optimization conditions of process are RC 1 g/L,pH 11,temperature 302 K and initial HAY concentration 100 mg/L.Under these conditions,the measured adsorption ratio and adsorption capacity are 87.91%and 87.91 mg/g,respectively.Thus,the RC is considered to be a potential adsorbent for the removal of residual amine from aqueous solution.Refined carbon （RC） derived from coal fly ash （CFA） as well as powdered activated carbon （PAC） was investigated as adsorbent to remove residual amine collector HAY from aqueous solution. The RC and PAC were characterized by scanning electron microscopy （SEM）, surface area measurement, Zeta potential measurement and Fourier transform infrared （FTIR） spectroscopy. The effect factors and mechanisms of HAY adsorption onto RC and PAC were studied in detail. The results show that the experimental kinetic data agree well with the pseudo second-order equation, and the Langmuir isotherm model is found to be more appropriate to explicate the experimental equilibrium isotherm results than the Freundlich model. The adsorption capacities of PAC and RC increase with pH. It is found that alkaline condition is conducive to the adsorption of HAY onto PAC and RC and the adsorption efficiency of RC is close to PAC at pH near 11. Zeta potential variation of adsorbents suggests that HAY generates electrostatic adsorption onto RC and PAC. FTIR analysis shows that the adsorption is dominantly of a physical process. The Box-Behnken design optimization conditions of process are RC 1 g/L, pH 11, temperature 302 K and initial HAY concentration 100 mg/L. Under these conditions, the measured adsorption ratio and adsorption capacity are 87.91% and 87.91 mg/g, respectively. Thus, the RC is considered to be a potential adsorbent for the removal of residual amine from aqueous solution.

关 键 词：powdered activated carbon coal fly ash refined carbon ADSORPTION amine collector HAY 

分 类 号：X703[环境科学与工程—环境工程] TQ424.1[化学工程]