Poly recycling contamination

The immobilization of the sensitizer and catalyst is especially effective, because contamination of the materials (NBD and QC) with a sensitizer or catalyst markedly lower the efficiency of this system. 4-(N,N-dimethylamino)benzophenone was immobilized on poly(styrene) (30) and silica gel to use it as insoluble sensitizer 101 The polymer pendant sensitizer (30) was much more active than the monomeric compound when used in acetonitrile. Usually, the sensitizing activity of the sensitizer remained almost unchanged through immobilization, but sometimes decreased depending on their structure. As a catalyst of back reaction to release heat, Co(II)-tetraphenylporphyrine was anchored on polystyrene) beads (31), and showed good activity in its immobilized form10Z>. Activity decrease was observed- after several times recyclings of the catalyst. 

Komolprasert V and Lawson A, 1995, Residual contaminants in recycled poly(ethylene terephthalate) -effects of washing and drying. In ACS Symposium series 609, Plastics, Rubber and Paper Recycling A pragmatic approach. K.W. Hutchinson and N.R. Foster (editors), American Chemical Society Washington DC, 1995, pp. 435-444. 

R. FRANZ, A. MAUER, F. WELLE, European survey on post-consumer poly(ethylene terephthalate) materials to determine contamination levels and maximum consumer exposure from food packages made from recycled PET, Food Additives and Contaminants, 2004, 21(3), 265-286. 

R. FRANZ, F. WELLE, Post-consumer poly(ethylene terephthalate) for direct food contact application - challenge-test of an inline recycling process, Food Additives and Contaminants, 2002, 19(5), 502-511. 

Arshad MU, Jamil N, Naheed N, Hasnain S (2007) Analysis of bacterial strains from contaminated and non-contaminated sites for the production of biopolymers. Afr J Biotechnol 6 1115-1121 Asada Y, Miyake M, Miyake J, Kurane R, Tokiwa Y (1999) Photosynthetic accumulation of poly-(hydroxybutytate) by cyanobacteria-the metabolism and potential of C02 recycling. Int J Biol Micromol 25 37 2... 

Franz R, Mauer A, Welle F (2004) European survey on post-consumer poly(ethylene terephthalate) (PET) materials to determine contamination levels and maximum consumer exposure from food packages made from recycled PET. Food Addit Contam 21(3) 265-286 Franz R, Welle F (2008) Migration measurement and modelling from poly(ethylene terephthalate) (PET) into soft drinks and fruit juices in comparison with food simulants. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 25(8) 1033-1046 Guazzotti V, Marti A, Piergiovanni L et al (2014) Bio-based coatings as potential barriers to chemical contaminants from recycled paper and board for food packaging. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. doi 10.1080/19440049.19442013. 19869360... 

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