transfer and degradation of polyacrylamide based flocculants

transfer and degradation of polyacrylamide based flocculants
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  • Do polyacrylamide preparations protect water quality from agricultural runoff contaminants?
  • I. Effect on the mechanical strength and stability and soil structure. Egypt J Soil Sci 219:51–56 Entry JA, Sojka RE, Watwood M, Ross C (2002) Polyacrylamide preparations for protection of water quality threatened by agricultural runoff contaminants.
  • Does Pam degradation affect flocculant performance?
  • PAM-based flocculant degradation has been mainly studied for PAMs in aqueous solutions. The degradation of PAMs results in a reduction of the molecular weight of the polymer and can adversely affect the performance of such aqueous solutions in their commercial application as flocculants.
  • Does polyacrylamide stimulate methanogenesis?
  • Haveroen ME, MacKinnon MD, Fedorak PM (2005) Polyacrylamide added as a nitrogen source stimulates methanogenesis in consortia from various wastewaters. Water Res 39:3333–3341 Heath AR, Bahri PA, Fawell PD, Farrow JB (2006) Polymer flocculation of calcite: experimental results from turbulent pipe flow. AIChE J 52:1284–1293
  • Are Pam flocculants toxic?
  • The potential environmental hazard does not concern the PAM itself, which is generally considered as not toxic (Andersen 2005), but the products of PAM degradation and the residual AMD contained in the flocculants due to incomplete polymerization process (Labahn et al. 2010; Young et al. 2007; Caulfield et al. 2002).