Study on Removal of Humic Acid by Polyurethane Foam/Activated Carbon Composites in Boiler Feedwater
A new type and high efficiency adsorbent was prepared with powder activated carbon and polyurethane vesicant and surfactant, which being used to adsorb humic acid (HA) in boiler feedwater. The batch adsorption experiments were carrid at different pH value, different adsorbent dosage and different initial concentration to investigate HA removal rate and adsorption capacity by as-produced adsorbent. Their adsorption kinetics experiments data was fitted with pseudo-second-order rate model, its quation was l/qt=0.094+5.51/t, and equilibrium adsorption capacity obtained from fitting curve was 10.6mg/g, consistent with the experimental results(11.5mg/g).The adsorption isotherm test was carried at 25℃-50℃, the equilibrium adsorption capacity was 10.9mg/g by Langmuir model, which being similar with experiment results, the free energy (AG), enthalpy (AH) and entropy (AS) were obtanined with ClapeyronClausius and Gibbs-Helmholtz equation in the adsorpti on isotherm, which all were negative, indicated that HA adsorbed by as-produced adsorbent was an exothermic process of entropy reduction.
humic acid(HA) powder activated carbon (PAC) adsorption kinetics.
Zhiping Zhu Kelong Huang Yi Zhou
College of Chemistry and Chemical Engineering, Central South University, Changsha 410082,China
国际会议
2010 International Conference on Advanced Mechanical Engineering(2010年先进机械工程国际学术会议 AME 2010)
洛阳
英文
452-456
2010-09-04（万方平台首次上网日期，不代表论文的发表时间）