Demonstration of GTS Duratek Process for Stabilizing Mercury Contaminated (<260 ppm) Mixed Wastes. Mixed Waste Focus Area. OST Reference No. 2409

Mixed Waste Encapsulation in Polyester Resins. Treatment for Mixed Wastes Containing Salts. Mixed Waste Focus Area. OST Reference #1685

10.2172/1248048 ◽

1999 ◽

Author(s):

Not Given Author

Keyword(s):

Polyester Resins ◽

Mixed Wastes ◽

Mixed Waste

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Mixed Waste Integrated Program: A technology assessment for mercury-containing mixed wastes

10.2172/10179819 ◽

1993 ◽

Author(s):

J.J. Perona ◽

C.H. Brown

Keyword(s):

Technology Assessment ◽

Mixed Wastes ◽

Mixed Waste ◽

Integrated Program

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Processability of Different Polymer Fractions Recovered from Mixed Wastes and Determination of Material Properties for Recycling

Polymers ◽

10.3390/polym13030457 ◽

2021 ◽

Vol 13 (3) ◽

pp. 457

Author(s):

Selina Möllnitz ◽

Michael Feuchter ◽

Ivica Duretek ◽

Gerald Schmidt ◽

Roland Pomberger ◽

...

Keyword(s):

Material Properties ◽

Polymer Processing ◽

Thermal Recovery ◽

Mechanical Recycling ◽

Compression Moulding ◽

Moulding Process ◽

Processing Depth ◽

Washing Process ◽

Mixed Wastes ◽

Mixed Waste

To achieve future recycling targets and CO2 and waste reduction, the transfer of plastic contained in mixed waste from thermal recovery to mechanical recycling is a promising option. This requires extensive knowledge of the necessary processing depth of mixed wastes to enrich plastics and their processability in polymer processing machines. Also, the selection of a suitable processing method and product application area requires appropriate material behaviour. This paper investigates these aspects for a commercial processed, mixed waste, and two different mixed polyolefin fractions. The wastes are processed at different depths (e.g., washed/not washed, sorted into polyethylene, polypropylene, polyethylene terephthalate, polystyrene/unsorted) and then either homogenised in the extruder in advance or processed heterogeneously in the compression moulding process into plates. The produced recyclates in plate form are then subjected to mechanical, thermal, and rheological characterisation. Most investigated materials could be processed with simple compression moulding. The results show that an upstream washing process improves the achievable material properties, but homogenisation does not necessarily lead to an improvement. It was also found that a higher treatment depth (recovery of plastic types) is not necessary. The investigations show that plastic waste recovery with simple treatment from mixed, contaminated wastes into at least downcycling products is possible.

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Optimization of Savannah River M-Area Mixed Waste for Vitrification

MRS Proceedings ◽

10.1557/proc-465-139 ◽

1996 ◽

Vol 465 ◽

Cited By ~ 1

Author(s):

Sabrina S. Fu ◽

Hao Gan ◽

Isabelle S. Muller ◽

Ian L. Pegg ◽

Pedro B. Macedo

Keyword(s):

Chemical Durability ◽

Waste Stream ◽

Limiting Factor ◽

Savannah River ◽

Total Alkali ◽

Optimization Study ◽

Mixed Wastes ◽

Waste Loading ◽

Mixed Waste ◽

Leaching Procedure

ABSTRACTVitrification studies of actual Savannah River M-Area mixed wastes have shown that the limiting factor for high waste loading of this waste stream is its chemical durability as defined by the toxicity characteristics leaching procedure (TCLP). As part of the optimization study of Savannah River M-Area wastes, a number of additives were examined including Na2O, Li2O, B2O3, ZrO2, and TiO2. This paper reports on the effect of varying the boron to total alkali ratio and on the effect of substitutions such as ZrO2 for waste and TiO2 for SiO2 on the chemical durability and processability of M-Area waste glasses.

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