Papers by Author: Kuang Cheng

Abstract: The diaphragm valve is the key component of the deashing device in a pulse bag filter. It affects the investment cost, operation cost and the floor area, as well as the wide application of the dust removers on jetting performance directly. The development of a low pressure valve with a diameter of 100 was optimized by orthogonal test. The large-sized low-pressure diaphragm valve with the jetting and technical economic performance has been widespread used in market, it was better than small-sized one by parameter comparison between another similar one, the valve body resistance is decreased with the rise of diameter.

Abstract: Nanoparticles of sulfur with an average diameter of 5-35 nm were successfully prepared using eggshell membrane (ESM) as template in the the presence of surfactant Tween-80. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and fourier transform infrared spectroscopy (FTIR). The sizes of the nanoparticles sulfur were estimated by Debye-Scherrer formula according to XRD spectrum. Based on the detailed investigation, a possible synthesis mechanism is discussed here.

Abstract: 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.