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- W4385737820 abstract "Abstract Bamboo and coffee, which are abundant and inexpensive, have been used as green adsorbents for the adsorption of industrial dye rhodamine B (RB). Bamboo and coffee are natural sources of cellulose, hemicellulose, and lignin, making them promising green materials for industrial dye removal. The effects of various adsorption conditions, such as contact time, temperature, dose of bamboo powder (BP), coffee ground (CG), initial concentration of RB, and pH values of RB solution, were measured. Consequently, the kinetics of RB adsorption onto bamboo and coffee was in accordance with the pseudo-second-order model, with an activation energy of 29.51 kJ·mol − 1 for bamboo and 27.46 kJ·mol − 1 for coffee. The Langmuir model is well fitted to the whole adsorption period at different temperatures, indicating maximum adsorption capacities of 6.76, 6.96, and 7.64 mg⋅g − 1 (BP) as well as 6.53, 6.80, and 7.51 mg⋅g − 1 (CG) at 30°C, 40°C, and 50°C, respectively. Moreover, the spontaneous nature of the adsorption was based on the negative Gibbs free energy values obtained ( i.e. , from − 11.09 to − 14.30 kJ⋅mol − 1 [BP] and from − 10.34 to − 13.07 kJ⋅mol − 1 [CG]), revealing that RB adsorption occurred at physical and chemical adsorption states. In addition, the recycling capability of adsorbents was determined in five cycles. Therefore, these materials are promising candidates for low-cost adsorbents." @default.
- W4385737820 created "2023-08-11" @default.
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- W4385737820 date "2023-08-10" @default.
- W4385737820 modified "2023-09-27" @default.
- W4385737820 title "Natural bamboo powder and coffee ground as low-cost green adsorbents for the removal of rhodamine B and their recycling performance" @default.
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- W4385737820 doi "https://doi.org/10.21203/rs.3.rs-3216705/v1" @default.
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