Heming Luo

Study on the synthesis and flocculating of a new flocculant

This paper reported the synthesis of a new flocculant, a carboxymethyl guar through a rapid semidry process, using a natural guar gum as basic material. The factors which affect degree of substitution (DS) of carboxymethyl guar, such as the reaction temperature, the reaction time, the consumption of chloroacetic acid, and the consumption of sodium hydroxide etc were studied. The best synthesis condition was concluded. The flocculating property of the produced flocculant was studied. The experiment results showed that the turbidity ratio of the micro-polluted water was better than other flocculants. The synthetic flocculant should have potential applications in the wastewater market.

Study on the Purification Conditions of Silica Dust

This article focused on the purification conditions of silica dust JiaYuGuan of GanSu. The best processing conditions turned out to be as following: calcinations temperature, 700℃; calcinations time, 120min; rate(m/m) of HCl solution(10%, by mass) and silica dust, 3.5:1; acid-dipping time, 5h. The silica dust that the percent of SiO2 was above 95%(by mass) were obtained.