化学改性橘子皮对Cu2+吸附性能的研究

In this study, chemically modified orange peel biosorbent was prepared through the processes of ethanol immersing-saponification-acid immersing by using waste orange peel as raw material. Copper adsorption by this biosorbent was investigated. Effects of various parameters, including solution pH, contact time, initial Cu2+ concentration and temperature, were studied by batch experiments and adsorption kinetics and isotherms were investigated. Kinetics was found to be best-fit pseudo-second order equations. Equilibrium was well described by Langmuir isotherms rather than Freudlich isotherms, and maximum adsorption capacity was 70.671mg•g-1. With increase of temperature, adsorption efficiency decreased, and the adsorption process was an exothermic process. The cycle experiments suggested that this biosorbent was suitable for repeated use for more than five cycles.