1 Using quail eggshell to treat methylene blue in aqueous solution / Tran Thi Kieu Ngan, Dao My Uyen, Le Van Thuan // Khoa học & Công nghệ Đại học Duy Tân .- 2022 .- Số 5(54) .- P. 116-123 .- 363

In this study, the raw quail eggshell powder (RQEP) was utilized as a cheap and environmentally friendly adsorbent to remove methylene blue (MB) from aqueous media under different conditions. The morphology of the prepared adsorbent was determined by scanning electron microscopy. The Langmuir and Freundlich isotherm models were used to model the adsorption data. The obtained results showed that the adsorption of MB on RQEP was well-fitted with the Freundlich model. The optimal conditions for the MB adsorption were also established. The RQEP material has been shown to be effective in MB treatment in aqueous solution with a maximum adsorption capacity of 11.47mg/g.