Bioleaching of copper from waste printed circuit board by potential bacteria isolated from a landfill

Electronic waste has been identified as one of the fastest growing wastes generated globally that is predicted to surpass 111 million tons per year by 2050. Ewaste is becoming a worrying issue not just for its high volume generated, but also due to high composition of heavy metals it contains. This...

Full description

Saved in:
Bibliographic Details
Main Author: Razali, Muhammad Syafiq
Format: Thesis
Language:English
Published: 2022
Subjects:
Online Access:http://eprints.utm.my/id/eprint/99631/1/MuhammadSyafiqRazaliMMJIIT2022.pdf
Tags: Add Tag
No Tags, Be the first to tag this record!
id my-utm-ep.99631
record_format uketd_dc
spelling my-utm-ep.996312023-03-08T03:46:37Z Bioleaching of copper from waste printed circuit board by potential bacteria isolated from a landfill 2022 Razali, Muhammad Syafiq T Technology (General) Electronic waste has been identified as one of the fastest growing wastes generated globally that is predicted to surpass 111 million tons per year by 2050. Ewaste is becoming a worrying issue not just for its high volume generated, but also due to high composition of heavy metals it contains. This may contribute to potential environmental pollution if e-waste is not managed properly. High volume of e-waste leads to a new prospect of material acquisition through the concept of urban mining by extracting the valuable metals from the e-waste. This metal is usually extracted from components such as waste printed circuit board which houses valuable metals such as copper. Conventional extracting processes, however, pose harmful environmental effects as well as incur high cost. The purpose of the study is to introduce an alternative greener method of extraction which uses microbial activity to extract metals namely bioleaching. This study focuses on the isolation of bacteria sourced from the sanitary landfill to be used as the bacterial strain for bioleaching accompanied by minimal pre-processing to reduce the amount of secondary pollution from the pre-processing. The strains were grown in low pH medium, utilising their tolerance towards low pH condition for the copper bioleaching process. Four bacterial strains were isolated. Using 16S rRNA gene sequencing, the isolates were identified as Bacillus sp. strain SE, Bacillus sp. strain SC, Lysinibacillus sp. strain SE2 and Oryzobacter sp. strain S1A. All the isolates showed some bioleaching activity with strain SC being able to extract the highest amount of copper from the bioleaching with value of up to 23.36 ppm through the two-step bioleaching method. Strain SC was used to further evaluate the copper extraction by using pure copper strip to evaluate the mobilisation of copper by the strain microbial activity and it managed to mobilise 818.1 ppm of copper. These results suggest that the standalone bioleaching activity by strain SC is proven to perform effectively. 2022 Thesis http://eprints.utm.my/id/eprint/99631/ http://eprints.utm.my/id/eprint/99631/1/MuhammadSyafiqRazaliMMJIIT2022.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:150839 masters Universiti Teknologi Malaysia Malaysia-Japan International Institute of Technology (MJIIT)
institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
language English
topic T Technology (General)
spellingShingle T Technology (General)
Razali, Muhammad Syafiq
Bioleaching of copper from waste printed circuit board by potential bacteria isolated from a landfill
description Electronic waste has been identified as one of the fastest growing wastes generated globally that is predicted to surpass 111 million tons per year by 2050. Ewaste is becoming a worrying issue not just for its high volume generated, but also due to high composition of heavy metals it contains. This may contribute to potential environmental pollution if e-waste is not managed properly. High volume of e-waste leads to a new prospect of material acquisition through the concept of urban mining by extracting the valuable metals from the e-waste. This metal is usually extracted from components such as waste printed circuit board which houses valuable metals such as copper. Conventional extracting processes, however, pose harmful environmental effects as well as incur high cost. The purpose of the study is to introduce an alternative greener method of extraction which uses microbial activity to extract metals namely bioleaching. This study focuses on the isolation of bacteria sourced from the sanitary landfill to be used as the bacterial strain for bioleaching accompanied by minimal pre-processing to reduce the amount of secondary pollution from the pre-processing. The strains were grown in low pH medium, utilising their tolerance towards low pH condition for the copper bioleaching process. Four bacterial strains were isolated. Using 16S rRNA gene sequencing, the isolates were identified as Bacillus sp. strain SE, Bacillus sp. strain SC, Lysinibacillus sp. strain SE2 and Oryzobacter sp. strain S1A. All the isolates showed some bioleaching activity with strain SC being able to extract the highest amount of copper from the bioleaching with value of up to 23.36 ppm through the two-step bioleaching method. Strain SC was used to further evaluate the copper extraction by using pure copper strip to evaluate the mobilisation of copper by the strain microbial activity and it managed to mobilise 818.1 ppm of copper. These results suggest that the standalone bioleaching activity by strain SC is proven to perform effectively.
format Thesis
qualification_level Master's degree
author Razali, Muhammad Syafiq
author_facet Razali, Muhammad Syafiq
author_sort Razali, Muhammad Syafiq
title Bioleaching of copper from waste printed circuit board by potential bacteria isolated from a landfill
title_short Bioleaching of copper from waste printed circuit board by potential bacteria isolated from a landfill
title_full Bioleaching of copper from waste printed circuit board by potential bacteria isolated from a landfill
title_fullStr Bioleaching of copper from waste printed circuit board by potential bacteria isolated from a landfill
title_full_unstemmed Bioleaching of copper from waste printed circuit board by potential bacteria isolated from a landfill
title_sort bioleaching of copper from waste printed circuit board by potential bacteria isolated from a landfill
granting_institution Universiti Teknologi Malaysia
granting_department Malaysia-Japan International Institute of Technology (MJIIT)
publishDate 2022
url http://eprints.utm.my/id/eprint/99631/1/MuhammadSyafiqRazaliMMJIIT2022.pdf
_version_ 1776100627975241728