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Abstract
Present work demonstrates the PCB waste characterization using solid state route. Microwave and resistive heating have been used for heating the PCB waste sample and inter-comparison studies have been carried out in order to understand the nature of volatiles and residue obtained during the two different heating processes. GC -MS was used to analyze the volatiles, collected during microwave heating and shows the presence of CO2 as major volatile. Simultaneous TG -DTA -EGA (FTIR) was used in air and inert atmospheres for online analysis of volatiles where CO2 was observed as major volatile in inert atmosphere along with moisture while CO evolution was also confirmed as major evolved gas along with CO2 and moisture in air atmosphere.
Highlights
The rapid growth of technology, especially in the field of electronics and instrumentation and upgradation of electronic gadgets due to technological advancements in terms of providing better features at reasonable cost have led to the high rate of obsolescence in the electronic industry
TG curves have been shown in Figure 2 for the Printed Circuit Board (PCB) samples heated from room temperature to 4000C and 10000C in air / inert atmospheres
The first evolution of gases is seen at 2820C corresponding to CO2 in air while first notecible evolution of gases was observed at 3790C in inert atmosphere having the wave numbers ~750, 1174, 1261 and 3643cm-1 which could not be identified as a specific volatile compound / gas but suggests the presence of alcohols as volatiles
Summary
The rapid growth of technology, especially in the field of electronics and instrumentation and upgradation of electronic gadgets due to technological advancements in terms of providing better features at reasonable cost have led to the high rate of obsolescence in the electronic industry. Electronic industrial development has certainly provided a better life to humanity and resulted in one of the fastest growing waste streams in the world which consists of the obsolete electrical and electronic products [1]. The generation of e-waste and its recycling needs to be addressed in India to deal with the dangerous impact of toxic ingredients on the environment and human beings [2]. Recyclers and dismantlers are explicitly dumping residual ash of e-waste generated from crude recycling processes. There is an immediate need to formulate an appropriate strategy to reduce e-waste pollution. The current recycling practices of e-waste in
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