Geotechnical engineering of embankment dams by Robin Fell
By Robin Fell
The purpose of this publication is to offer a "state of practice", relatively highlighting universal difficulties, blunders and omissions. subject matters addressed contain embankment dams, weathering approaches, geotechnical investigations, and origin grouting.
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The solubility of a polymer changes with the variation in pressure and temperature of the SCF. After nylon is dissolved in a solution such as formic acid, a supercritical CO2 as an anti-solvent is added to precipitate the nylon out of the solution. Both the solvent and the anti-solvent can be recycled. DEPOLYMERIZATION OF NYLON Recovery of raw chemicals that can be used to produce virgin-quality nylon is a very attractive approach. Chemical recycling of nylon 6 carpet face fibers has been developed into a closed-loop recycling process for waste nylon carpet [16,17,18,19].
Here, goods are generally presented to the waste merchant compressed so that transport costs are minimised. For example, fibre extrusion waste (from denier, 34 © 2007, Woodhead Publishing Limited, except Supply chain partnerships for sustainable textile production © 2004, John Easton colour changes etc) can be reprocessed and there is a ready market. It gets more complicated further downstream, however. We have looked at reprocessing cotton gloves from car makers whose operators on the car assembly line typically get through 1 tonne of gloves per month.
It will introduce some of the methods that can be employed to encourage ecodesign helping to ensure that in future products from this sector illustrate clear environmental improvements to customers. With the complexity of the structure of the textile and clothing industry and the nature of environmental problems it is particularly important that all supply chain members work together to ensure that ecodesign becomes an accepted part of good product development. Such a proactive approach could result in a significant improvement of image with the consumer.