Carbon nanotubes (CNTs) are increasingly being used in electronics products. CNTs have unique chemical and nanotoxicological properties, which are potentially dangerous to public health and the environment. This report presents the most recent findings of CNTs’ toxicity and discusses aspects related to incineration, recycling and potential remediation strategies including chemical and biologica...

The results from numerous studies on the plastics fractions obtained from waste electrical and electronic equipment have been analysed and an assessment made of their suitability for recycling or other forms of recovery. In view of the challenge to ensure the suitability for mechanical recycling by removal of various substances, it is concluded that it is prudent to explore the benefits or othe...

Decreasing feature size, low cost, and high yield continue to drive the silicon electronics industry. Perfect atomic surface silicon is therefore needed to manufacture high yield devices of submicron dimensions. In addition, there are rising environmental concerns, and EPA regulation is broadening its control over industrial environment. The solution to maintain traditional low cost wet cleanin...

This study reviews the problems in the use and disposal of poly (ethylene terephthalate) (PET) and includes the concise background of virgin and recycled PET as well as their possible applications. The current state of knowledge with respect to PET recycling method is presented. Recycling of PET is the most desirable method for waste management, providing an opportunity for reductions in oil us...

Chemical recycling of Polyethylene terephthalate, PET, wastage has been investigated in this study. The aim of this work is recovery of terephthalic acid and ethylene glycols from PET waste. This process has been done in two stages. At the first stage, reaction between PET waste and sodium hydroxide for production of ethylene glycol and sodium terephthalate solution carried out in a stainless s...

Introduction Among the different factors accounting for the better utilization of poor forages by goats, compared with sheep, urea recycling and better mastication during ingestion have been reported (Masson et al, 1986; Morand-Fehr et al, 1987). Our purpose was to measure the particle size in the alimentary bolus and to indirectly assess urea recycling, by chemical analysis of alimentary bolus.