Enhanced biological phosphorus removal by granular sludge: From macro- to micro-scale

Porous Pr(OH)3 nanowires as novel high-performance adsorbents for phosphate removal

“…So far, a great deal of research effort has been contributed to studying the removal of phosphate from water via different approaches [2], such as biological treatment, membrane separation and chemical coagulation/precipitation [3][4][5]. In particular, adsorption method has been most widely investigated, due to its easy operation, low cost, high removal rate and efficiency, and invulnerability to coexisting pollutants [6][7][8][9][10].…”

“…Recent studies have revealed their great potential as prominent materials to efficiently remove a number of pollutants from water, including phosphate anions [11][12][13][14][15][16][17]. For instance, our previous study found that La(OH) 3 particles exhibited a promising maximum phosphate adsorption capacity, which was 57.8 mg P/g [17]. Our recent work reported the preparation of La(OH) 3 -doped exfoliated vermiculite (La-EV); its phosphate uptake was approximately one order of magnitude greater than that of undoped natural exfoliated vermiculite [18].…”

“…For instance, our previous study found that La(OH) 3 particles exhibited a promising maximum phosphate adsorption capacity, which was 57.8 mg P/g [17]. Our recent work reported the preparation of La(OH) 3 -doped exfoliated vermiculite (La-EV); its phosphate uptake was approximately one order of magnitude greater than that of undoped natural exfoliated vermiculite [18]. When used in the secondary-treated wastewater, ~ 98% of the final adsorption capacity of La-EV reached within 10 min; especially after that the phosphate concentration was reduced to < 50 µg P/L [18].…”

“…In 2012, Tong's group reported the electrochemical synthesis of porous 1D rare earth hydroxide, Pr(OH) 3, nanomaterials and their application in removing Congo red dye from water [11,12]. The Congo red adsorption capacity of porous Pr(OH) 3 NWs was ~ 837 mg/g, which was dramatically greater than that of active carbon, ascribed to their unique structural and chemical properties, e.g. great surface area, special porous structure, and ample hydroxyl groups [12].…”

“…great surface area, special porous structure, and ample hydroxyl groups [12]. More importantly, the environmental toxicity study on porous 1D Pr(OH) 3 NWs suggested they be environmentally friendly adsorbents for practical water treatment [12].…”