Tổng hợp vật liệu hấp phụ từ bentonite và vỏ trấu ứng dụng xử lý nước thải tại trường Đại học Cửu Long

Abstract

This study combined bentonite and pyrolysis husk to produce adsorbent that can be used to remove contaminants. The results showed that the synthesized adsorbent was successfully produced by mixing bentonite/husk with the ratio of 50/50% (wt/wt), and the pyrolysis conditions were 600°C for 2 hours. The material characteristics were analyzed using XRD, SEM and BET methods. The XRD results showed that the absorbent still has specific peaks of bentonite and pyrolysis of rice husks. SEM images showed the higher porous structure than the raw bentonite, and the specific surface area of adsorbent was S_A = 87.0 m²/g, these were showed about 4.1 times larger than the raw bentonite material (about 21.2 m²/g) and 2.5 times larger than raw bentonite from international references (about 35.0 m²/g). The experiments were carried out with waste water in Mekong University and results showed that the color’s compounds were absorded 100%.

Key words: Waste water, bentonite, pyrolysis husk.