Porous honeycomb cork biochar for efficient and highly selective removal of phosphorus from wastewater

Abstract

In this study, an adsorbent (LCB) with rich honeycomb structure was prepared from cork waste generated from furniture factories for efficient adsorption of excess phosphorus (P) from wastewater. This adsorbent was successfully prepared in only one step, in situ precipitation method, which greatly simplified the synthesis process. Kinetic studies showed that when the initial concentration (C0) of wastewater was 10 mg P L−1, the P in the water could be completely adsorbed within 20 min. The adsorption efficiency of phosphorus was significantly improved compared to previous studies. When the C0 of pollutant and the dosage of LCB were 20 mg P L−1 and 0.5 g L−1, respectively, the removal rate of P exceeded 99% in the pH range of 3–10, which indicates the wide applicability of LCB. In addition, the P adsorption capacity of LCB was 82.4% of its initial value after nine adsorption–desorption cycles, indicating that LCB has a high stability and can be widely used in different water environments. Therefore, LCB is a promising material for the treatment of P-containing wastewater. Graphical Abstract

Lanthanum-Integrated Porous Adsorbent for Effective Phosphorus Removal

“…It is founded that a large number of white dots appeared, while the elements La, O, C, and P are uniformly distributed, indicating the successful adsorption of phosphate (Figure S5). 46,47 FTIR analysis also shows the characteristic peak at 1053 cm −1 , assigned to the bending vibration of P−O bond, 48 and the peak at 577 cm −1 related to the vibration of the La−O−P bond 49 for the La(OH) 3 /CK-DETA-P sample after phosphate adsorption (Figure 4b). The full-spectrum XPS analysis indicates an obvious P 2p peak at 133.5 eV after adsorption of phosphate (Figure 4c,d), confirming the occurrence of phosphate adsorption.…”