Facile Modification of Biochar Derived from Agricultural Straw Waste with Effective Adsorption and Removal of Phosphorus from Domestic Sewage

Significant Improvement of Adsorption for Phosphate Removal by Lanthanum-Loaded Biochar

“…In order to further describe the adsorption process on biochar, the intraparticle diffusion (eq ) was also explored . If the fitted lines of intraparticle diffusion do not pass through the origin, then intraparticle diffusion is not the only diffusion mechanism. , q normalt = K 3 t 0.5 + C where q t (mg/g) denotes the adsorbed amount of phosphate at time t ; K is the kinetic constant and C is a constant.…”

“…A UV–visible spectrophotometer operating at a wavelength of 700 nm was used to measure the equilibrium concentration of phosphorus ions in the solution. The phosphorus removal rate was calculated by eq : R = C 0 − C normale C 0 × 100 % where R (%) is the phosphorus removal rate, C 0 (mg/L) is the initial concentration of phosphorus ions before adsorption, and C e (mg/L) is the equilibrium concentration of phosphorus ions in the solution. , In addition, the adsorption capacity q e of phosphorus per material was calculated as: q normale = V × C normale − C 0 M where q e (mg/g) is the equilibrium adsorption capacity, V (L) is the volume of solution, and M (g) is the mass of adsorbent. − …”

“…The phosphorus removal rate was calculated by eq 1 : where R (%) is the phosphorus removal rate, C 0 (mg/L) is the initial concentration of phosphorus ions before adsorption, and C e (mg/L) is the equilibrium concentration of phosphorus ions in the solution. 2 , 26 In addition, the adsorption capacity q e of phosphorus per material was calculated as: where q e (mg/g) is the equilibrium adsorption capacity, V (L) is the volume of solution, and M (g) is the mass of adsorbent. 27 − 30 …”

“…In recent years, eutrophication pollution caused by wastewater containing phosphorus has gained attention among scientific communities. , Numerous techniques have been used to remove phosphorus from wastewater, including biological methods, , chemical precipitation, , electrolysis, , adsorption, − and so on. Among them, biochar adsorption has received a lot of attention due to its environmental and economic benefits .…”

Adsorption of phosphate over a novel magnesium-loaded sludge-based biochar

“…The most typical way was to alter biochar (BC) with metal ions using various methods such as prediction. The aluminum/magnesium (Al/Mg) modified BC can achieve a phosphate adsorption capacity of 74.47 mg·g -1 by employing an Al electrode and a concentrated Mg solution as the electrolyte [ 10 ]. Other metals, such as calcium (Ca) and Mg, are also employed to increase phosphate adsorption by BC.…”