Can polyacrylamide be used as a nitrogen source for soil microorganisms?

Kay-Shoemake et al. ( 1998) have found that the first step of the extracellular biodegradation of copolymers is the hydrolysis of the amide group into NH 3 by amidases. They demonstrated that polyacrylamide can be used as a nitrogen source for soil microorganisms.

Is acrylamide and potassium acrylate a water absorbing geocomposite?

For the purposes of this study, the dry technical copolymer of acrylamide and potassium acrylate containing 5.28 % of unpolymerized monomers was wrapped in a geotextile and incubated in unsterile Haplic Luvisol soil as a water absorbing geocomposite.

Is cross-linked polyacrylic acid soluble?

However, after 1–6 years of soil incubation, their level decreased below the detection limit. In the opinion of Bai et al. ( 2014 ), about 4 % of the products of cross-linked polyacrylic acid remain as a soluble fraction of monomers that are particularly easily and preferentially utilized by microorganisms.

Are high molecular cross-linked copolymers more resistant to biodegradation?

High molecular cross-linked copolymers are more resistant to biodegradation than monomers (Sutherland et al. 1997 ). The mineralization of polyacrylates with molecular weight of 70,000 g mol −1 ranged from 4 to 7 % during 1 year and it occurred mainly within the first month (Mai et al. 2004 ).

Can soil bacteria cleave the carbon chain of acrylamide monomer?

Kay-Shoemake et al. ( 1998) have demonstrated that soil bacteria used polyacrylamide as the sole nitrogen source and acrylamide monomer as the sole carbon and nitrogen source. They suggested that these microorganisms were unable to cleave the main carbon chain of the polymer.

What is the decomposition temperature of poly (potassium acrylate-co acrylamide)?

However, copolymer decomposition temperature of poly (potassium acrylate- co -acrylamide) was found to be 166 °C (Lu et al. 2003 ). The selected bacteria, which were characterized by their ability to utilize the technical SAP as the sole carbon and energy source, were identified by the sequencing of the 16S rRNA gene.