Biodegradation of Polyacrylamide and Its Derivatives
Although polyacrylamide (PAM) and its derivatives have many useful applications, their release in nature can have impacts on the environment and human health, thus bioremediation approaches for residual PAM are urgently needed. Biodegradation of PAM and its derivatives has been studied only in the last two decades, with most emphasis on acrylamide biodegradation.
The hydrolyzed form of polyacrylamide (HPAM), a co-polymer of acrylamide and acrylic acid, is the most widely used anionic PAM in oil and gas development as well as in soil conditioning. 1,9,12,21
Biodegradability enhancement of hydrolyzed polyacrylamide
Biodegradability enhancement of hydrolyzed polyacrylamide wastewater by a combined Fenton-SBR treatment process Bioresource Technology ( IF 6.669) Pub Date : 2025-01-19, DOI: 10.1016/j.biortech.2025.01.074
The special function bacteria R2 was screened from hydrolyzed polyacrylamide (HPAM)‐containing wastewater that could use HPAM as the sole carbon source and nitrogen source. Through optimizing the condition of HPAM biodegradation, the removal rate of R2 free strain reached to 41.6% when pH was 7, temperature was 35°C, inoculation quantity (v
Biodegradation of Partially Hydrolyzed Polyacrylamide HPAM
Bao, M., Chen, Q., Li, Y., and Jiang, G. 2010. Biodegradation of partially hydrolyzed polyacrylamide by bacteria isolated from production water after polymer flooding in an oil field. Journal of Hazardous Materials 184(1–3): 105–110.
The increasing usage of partially hydrolyzed polyacrylamide (HPAM) in oilfields as a flooding agent to enhance oil recovery at so large quantities is an ecological hazard to the subsurface ecosystem due to persistence and inertness. Biodegradation of HPAM is a potentially promising strategy for dealing with this problem among many other methods available.
Recent Advances in Petroleum Microbiology | Microbiology
SUMMARY Recent advances in molecular biology have extended our understanding of the metabolic processes related to microbial transformation of petroleum hydrocarbons. The physiological responses of microorganisms to the presence of hydrocarbons, including cell surface alterations and adaptive mechanisms for uptake and efflux of these substrates, have been characterized.
Yuan et al. reported the preparation of polyacrylamide (PAM)/CNF hydrogel where the H-bonding interaction between >C=O/N–H parts of PAM and –OH of CNF were found to be the mechanism of reinforcement . The composite hydrogel exhibited elongation at break of 2200% and fracture stress of 1.35 MPa, while, on compression, it can attain up to 99%
Lipid Geometrical Isomerism: From Chemistry to Biology
Lipid research in the life sciences has renewed its attractiveness in the last two decades or so, going from chemical, analytical, and biological subjects, to making important connections with nutrition, and with increasing societal relevance of health conditions related to lipid metabolism.
An Overview on the Enhancement of Enantioselectivity and Stability of Microbial Epoxide Hydrolases. Molecular Biotechnology 2017, 59 (2-3) , 98-116. DOI: 10.1007/s12033-017-9996-8. Yunchang Fan, Xiaojing Li, Lufei Song, Jing Li, Lei Zhang.
BIOLOGICAL ACTIVE COATING COMPONENTS, COATINGS, AND COATED
The M317A mutant demonstrated a 200-fold cleavage rate enhancement in the presence of alkylamines, which were added to reduce the substrate's negative charge. The M317H, M317K, and M317R mutants demonstrated modest improvements in rate and/or specificity, including a 7-fold k cat /K m improvement for the M317K mutant (Shim, H. et al., 1998).
The global mobile point-of-sale (POS) terminals market valued $19.5 billion in 2025, and it is expected to witness a CAGR of 17.9% during the forecast period (2025–2030). The increasing focus on an enhanced customer experience and emergence of cashless transactions are the major factors driving the mobile POS industry.
- What are polymer flocculants & coagulants used for?
- Polymer flocculants and coagulants are widely used in industry to aid in solid liquid separations. otherwise safe. PAM aids solid-liquid separation by causing suspended particles to bind and form larger aggregates. The process is known as polymer bridging. Also popular for erosion prevention in irrigation furrows and on construction sites.
- Does anionic polyacrylamide improve coagulation-flocculation process?
- Aguilar, M. I. et al. Improvement of coagulation-flocculation process using anionic polyacrylamide as coagulant aid. Chemosphere 58, 47–56 (2005). Muller, G., Fenyo, J. C. & Selegny, E. High molecular weight hydrolyzed polyacrylamides.
- What are water soluble polymer flocculants?
- Abstract Water soluble polymer flocculants are important constituents of solid–liquid separation units for the treatment of a variety of process-affected effluents. The systematic development of a ...
- How is an anionic polyacrylamide flocculant synthesized?
- In this study, an anionic polyacrylamide flocculant was synthesized by ultrasonic initiated template copolymerization (USTP), using sodium allylsulfonate (SAS) and acrylamide (AM) as monomers, poly diallyl dimethyl ammonium chloride (polyDADMAC) as template, and 2,2′-azobis [2- (2-imidazolin-2-yl) propane] dihydrochloride (VA-044) as initiator.
