Simultaneous production of clean water and organic dye from dyeing wastewater by reusable lignin-derived porous carbon

Solid shrimp waste derived nanoporous carbon as an alternative bio-sorbent for oxytetracycline removal from aquaculture wastewater

“…The adsorption efficiency slightly decreased from 100 % to 89.86 % after the 3 cycles of adsorbed SWC regeneration. Moreover, the OTC adsorption was decreased to 61.37 % after 5 cycles, indicating that the regeneration using a heat treatment significantly generated the soot particles from adsorbed OTC molecules covering the SWC pore structure [ 70 ], as well as the high temperature during regeneration may impact the pore degradation between carbon matrix and OTC adsorbate [ 71 ], resulting in the continuously lowering OTC adsorption efficiency after several regenerations, as displayed in Fig. 8 b.…”

Synthesis and adsorption characteristics of pudding-like Fe/C magnetic composites for methylene blue removal

“…The equilibrium adsorption capacity ( Q e , mg g −1 ), the instantaneous adsorption capacity at a certain adsorption time t ( Q t , mg g −1 ) and the dye solution removal rate ( R , %) were calculated according to eqn (1)–(3).where C 0 (mg L −1 ), C e (mg L −1 ), and C t (mg L −1 ) represent the initial, equilibrium and instantaneous concentration of the dye solution at a certain adsorption time of t , respectively; m (g) is the mass of the as-prepared samples added; V (mL) represents the volume of the reaction solution. Moreover, in order to explore the adsorption mechanism of MB molecules on the pudding-like Fe/C, the obtained experimental data were fitted using the pseudo-first (4) 28 and second-order (5) models. 29 ln ( q e − q t ) = ln q e − k 1 t where q e is the equilibrium absorption capacity (mg g −1 ) and q t is the absorption amount (mg g −1 ) at a specific time of t (min).…”

“…where C 0 (mg L À1 ), C e (mg L À1 ), and C t (mg L À1 ) represent the initial, equilibrium and instantaneous concentration of the dye solution at a certain adsorption time of t, respectively; m (g) is the mass of the as-prepared samples added; V (mL) represents the volume of the reaction solution. Moreover, in order to explore the adsorption mechanism of MB molecules on the pudding-like Fe/C, the obtained experimental data were fitted using the pseudo-first (4) 28 and second-order (5) models. 29 ln (q e À q t ) = ln q e À k 1 t (4)…”

Preparation of Fe3O4 Magnetic Material Modified by Fulvic Acid and Its Adsorption Performance for Methylene Blue

“…At present, pollution control technology had become an important factor affecting economic and social development, and the adsorption treatment technology of the organic dyes had been widely concerned. [27][28][29][30] The traditional adsorption materials were not easy to separate and regenerate. They carried the risk of secondary pollution.…”