Removal of Mercury from Wastewater by Adsorption Using Thiol-Functionalized Eggshell Membrane
The thiol-functionalized eggshell membrane (TF-ESM) was prepared by esterification between thioglycolic acid (CH2SHCOOH) and oxygen-containing functional groups on eggshell membrane (ESM). A promising potential biosorbent, TF-ESM, was used for the removal of toxic mercury in wastewater. Aqueous of mercury ions removing properties by TF-ESM were studied through batch experiments. The results indicated that the modified ESM has greatly enhanced the adsorption capacity for Hg2+, the maximum capacity was increased more than 3-fold in comparison with the unmodified ESM, from 19.4 mg g-1 to 71.9 mg g-1. The optimum of pH value for Hg adsorption was in the range of 2-8, which the removing rate over 96%. The results obtained show that the novel thiol-functionalized eggshell membrane performed well the removal and recovery of mercury from low concentration wastewaters.
Zhenyu Du and X.B Sun
X. Z. Cheng et al., "Removal of Mercury from Wastewater by Adsorption Using Thiol-Functionalized Eggshell Membrane", Advanced Materials Research, Vols. 113-116, pp. 22-26, 2010