Do polyaluminium chloride and anionic polyacrylamide water treatment residuals adsorb phosphorus?

Polyaluminium chloride and anionic polyacrylamide water treatment residuals (PAC-APAM WTRs) as an amendment in three types of soils with the ratios (w/w) of 10%, 15%, and 20% were evaluated for phosphorus adsorption from aqueous solutions by batch studies.

Does PAC-Apam increase phosphorus adsorption capacity?

Compared with soils without PAC-APAM WTRs, the maximum adsorption capacity of phosphorus increased by 0.50 to 25.30% in silty clay soil with PAC-APAM WTRs, by 18.59 to 47.13% in loam soil with PAC-APAM WTRs, and by 38.30 to 64.35% in silty loam (loess) soil with PAC-APAM WTRs.

Do PAC-Apam WTRS improve adsorption?

A trend was observed that the predominant adsorption mechanism gradually shifted from multilayer adsorption to monolayer adsorption with increased ratio of PAC-APAM WTRs to soils in the isotherm studies. The addition of PAC-APAM WTRs into soils best followed a pseudo-second-order model, but with a notably improved qe.

Is phosphorus adsorption favorable with Pac-Apam WTRS?

Based on the values of b (Table 2) and the equation, RL = 1/ (1 + bC0), it can be inferred that all the values of RL fell in the range of 0–1, indicating that phosphorus adsorption onto soils and soils with PAC-APAM WTRs was favorable (Foo & Hameed, 2010).