Indian Science Technology and Engineering facilities Map
Supplier Map
Service Map

Publications

Publication Details

Applicant:
Indian Institute of Technology (IIT) Patna 
Author:
Verma, A. and S. Hait,  
Corresponding Authors:
S. Hait 
DOI #:
https://doi.org/10.1016/j.psep.2018.10.005 
Title:
Chelating extraction of metals from e-waste using diethylenetriamine pentaacetic acid,  
Journal:
Process Safety and Environmental Protection  
Year:
2019 
Volume:
121 
Page:
1–11, 
Keywords:
E-waste, Printed circuit board, Metals, Chemical leaching, Chelation, DTPA 
Abstract:
In this study, the chelating extraction of base metals namely, Cu, Zn, Ni from printed circuit board (PCB)of obsolete computer was carried out using diethylene triamine pentaacetic acid (DTPA) as a safer ligand.At a liquid to solid ratio (L/S ratio) of 50 and the comminuted PCB in the size range of 0.038–1 mm,the maximum extraction of around 97% Cu at 4.5 d and more than 99% each of Zn and Ni at 3 d wasachieved using 0.5 M DTPA at pH of 9, temperature of 50◦C and mixing speed of 450 rpm. Using 0.9 MH2O2under optimized process conditions, around 99% Cu and 82% Ni leaching were achieved in 8 halong with complete leaching of Zn in 1 h only. Kinetics development using the shrinking core model(SCM) indicated that the metal extraction from the PCB comminution fines using DTPA is controlled bydiffusion process. Further, metal recovery of around 98% each for Cu and Ni and 95% for Zn was achievedby the chemical precipitation of the leachate. Chelating extraction using DTPA coupled with the chemicalprecipitation of the leachate has the potential to emerge as a complete solution for metal recycling frome-waste. 
Entered by:
Venkata Dantham on 2020-08-03 
 
I-Mitra(आई-मित्र) Welcomes You..
THE VISION
THE MISSION
ABOUT I-STEM
It has always been the basic tenet of the Government of India, in generously funding R&D efforts at academic institutions over the years, that facilities established through such support be made available to those needing them and qualified to make use of them for their own research work
read more >>

However, this was never easy or straightforward for, among other reasons, there was no ready source of information of what facility was available and where. Thanks to the Web, it is much easier today to have a national and regional “inventory of resources”, so as to match users with the resources they need, and to do all this in an efficient and transparent manner.

This can lead to a leap in R&D productivity and greatly enhance the effectiveness of public investment. This is the motivation behind I-STEM.
read less <<
Visitor Hit Counter
Hosted at Indian Institute of Science
Copyright © 2020 I-STEM. All rights reserved.
Audited by: STQC Bengaluru.