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.

How to determine anionic degree of copolymers?

The anionic degree of copolymers was determined from 13 C-NMR peak integration and titration method. The data obtained by these two methods seem to be in good agreement. The measured molecular weight of samples shows that we have reached a high molecular weight with excellent solubility.

How are water soluble acrylmide-based anionic copolymers prepared?

4. Conclusions Water soluble acrylmide-based anionic copolymers were prepared by free radical solution polymerization. By changing the AMPS monomer feed ratio from 10 to 70 weight percent, while keeping other reaction conditions constant, different anionic copolymers were synthesized.

Which spectroscopy technique was used to determine anionic degree of copolymer?

The miliequivalent gram of hydrochloric acid consumed was equal to the number of anionic monomer contents of each sample. 13 C-NMR spectroscopy technique was used for determination of the anionic degree of copolymer samples . 2.5. Viscosity Measurement in NaCl Solution

Do copolymer solutions show a non-Newtonian shear thinning behaviour?

According to the results, the copolymer solutions show a non-newtonian shear thinning behaviour. At high shear rate, the polymer chains are aligned in the direction of flow which result in reduced viscosity or shear-thinning behaviour.