ZHAO Jian-yi,WANG Kan-ming,LIU Yi-bing,et al.Preparation and Filtration Performance of Glass Filter Media Modified by APTES[J].China Water & Wastewater,2020,36(21 21):98-101.
Preparation and Filtration Performance of Glass Filter Media Modified by APTES
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
21 21
Page:
98-101
Column:
Date of publication:
2020-11-01
- Keywords:
- APTES; glass filter media; quartz sand; modification
- Abstract:
- Surface of waste beer bottle glass filter media with particle size of 0.8-1.2 mm after crushing and screening was modified by 3-aminopropyl triethoxysilane (APTES) to prepare a new modified filtration medium. Filtration experiment of micro-polluted water showed that the removal rates of turbidity (initial concentration of 4 NTU), humic acid (initial concentration of 5 mg/L) and fine particles (initial concentration of 9 551 pcs/mL with particle size of 2-180 μm) by the modified glass filter media were 62.5%, 67% and 66%, respectively. However, the removal rates of them by quartz sand were only 37.5%, 55% and 10%, respectively. The optimum conditions of modification were coupling agent concentration of 10%, reaction temperature of 110 ℃ and reaction time of 12 hours. After modification, specific surface area of the glass filter media increased from 0.326 m2/g to 3.451 m2/g, and isoelectric point pH increased from 2.3 to 9, which were much higher than those of quartz sand (0.293 m2/g and 1).
Last Update:
2020-11-01