Are cationic polyacrylamide copolymers bad for the environment?

Cationic polyacrylamide copolymers (PAMs) are used for sludge dewatering in municipal waste water treatment and might enter the environment by spreading of the sludge on agricultural land. Concern has been expressed since little is known about the degradation of PAMs in soils.

Do cationic polyacrylamide copolymers degrade in soil after land-spreading?

This project demonstrated that the synthetic cationic polyacrylamide copolymers (PAMs) incorporating C–C-bonds in the main chain slowly degrade in soil after land-spreading as a component of MWWTP sludge.

What is a cationic polyacrylamide copolymer (Pam)?

Inclusion in an NLM database does not imply endorsement of, or agreement with, the contents by NLM or the National Institutes of Health. Cationic polyacrylamide copolymers (PAMs) are used for sludge dewatering in municipal waste water treatment and might enter the environment by spreading of the sludge on agricultural land.

Is polyacrylate recalcitrant to biodegradation?

Although the remaining polyacrylate is more recalcitrant to biodegradation than the amide group, there are reports on degradation of polyacrylate by aerobic fungal, aerobic and anaerobic bacteria (Nyyssölä and Ahlgren, 2019).

Which reagent is used to degrade polyacrylamide in aqueous solution?

Ramsden, D. K. & McKay, K. Degradation of polyacrylamide in aqueous solution induced by chemically generated hydroxyl radicals: Part I-Fenton’s reagent. Polym. Degrad. Stab. 14, 217–229 (1986). Ramsden, D. K., & McKay, K.

Does sulfonated polyacrylamide degrade at a higher temperature?

The graphs below also suggest that sulfonated polyacrylamide (SPAM) (Figs. S3 (c) and (d)) degrades at a higher temperature than partially hydrolyzed polyacrylamide (HPAM) and associative polyacrylamide (APAM), indicating that SPAM has better thermal stability than others (Zhang et al., 2019). Table 4. Thermal degradation at each temperature state.