Removal of ionized nanosilver from wash water using emulsion liquid membrane process

The increasing number of products containing nanosilver has raised a great concern over the public due to the release behaviour of ionized nanosilver which create the toxicity problems especially to the aquatic organism. Therefore, there is a necessity for the removal of ionized nanosilver from wast...

Full description

Saved in:

Bibliographic Details
Main Author:	Raja Sulaiman, Raja Norimie
Format:	Thesis
Language:	English
Published:	2014
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/53725/25/RajaNorimieRajaSulaimanMFCHe2014.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.53725
record_format	uketd_dc
spelling	my-utm-ep.537252020-09-02T03:05:38Z Removal of ionized nanosilver from wash water using emulsion liquid membrane process 2014-07 Raja Sulaiman, Raja Norimie TP Chemical technology The increasing number of products containing nanosilver has raised a great concern over the public due to the release behaviour of ionized nanosilver which create the toxicity problems especially to the aquatic organism. Therefore, there is a necessity for the removal of ionized nanosilver from wastewater. One of the potential techniques is an emulsion liquid membrane process (ELM). This research investigated the extraction and recovery of ionized nanosilver from wash water using ELM process. The membrane phase contained kerosene as diluent, Cyanex 302 as a carrier, Span 80 as a surfactant and acidic thiourea as a stripping agent. The extraction was carried out in batch process using a mixer-settler and the recovery part was performed using a high voltage demulsifier. The ionization of nanosilver was determined using three variables which were effect of triethanolamine concentration, agitation speed and temperature. ELM stability was investigated at different surfactant concentration, ionic liquid concentration, agitation speed, homogenizer speed, emulsification time and extraction time. The parameter of extraction and recovery studied involving pH of external phase treat ratio, carrier concentration and stripping agent concentration. The optimization was done using response surface methodology (RSM) for the recovery process with three significant process variables. Results showed that almost 70% of nanosilver was ionized in the wash water. The most stable emulsion was observed at 3% w/v of Span 80, 150 rpm of agitation speed, 10,000 rpm of homogenizer speed and 5 minutes of emulsification and extraction time. Besides, almost 100% of ionized nanosilver was successfully extracted and the optimum conditions obtained for the recovery process using RSM were 0.256 treat ratio, 0.75 M sulphuric acid concentration and 0.85 M thiourea concentration. At this optimum condition, the maximum recovery of the ionized nanosilver was 84.74%. Thus, emulsion liquid membrane (ELM) method has a great potential in order to treat wash water containing ionized nanosilver. 2014-07 Thesis http://eprints.utm.my/id/eprint/53725/ http://eprints.utm.my/id/eprint/53725/25/RajaNorimieRajaSulaimanMFCHe2014.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:85363 masters Universiti Teknologi Malaysia, Faculty of Chemical Engineering Faculty of Chemical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Raja Sulaiman, Raja Norimie Removal of ionized nanosilver from wash water using emulsion liquid membrane process
description	The increasing number of products containing nanosilver has raised a great concern over the public due to the release behaviour of ionized nanosilver which create the toxicity problems especially to the aquatic organism. Therefore, there is a necessity for the removal of ionized nanosilver from wastewater. One of the potential techniques is an emulsion liquid membrane process (ELM). This research investigated the extraction and recovery of ionized nanosilver from wash water using ELM process. The membrane phase contained kerosene as diluent, Cyanex 302 as a carrier, Span 80 as a surfactant and acidic thiourea as a stripping agent. The extraction was carried out in batch process using a mixer-settler and the recovery part was performed using a high voltage demulsifier. The ionization of nanosilver was determined using three variables which were effect of triethanolamine concentration, agitation speed and temperature. ELM stability was investigated at different surfactant concentration, ionic liquid concentration, agitation speed, homogenizer speed, emulsification time and extraction time. The parameter of extraction and recovery studied involving pH of external phase treat ratio, carrier concentration and stripping agent concentration. The optimization was done using response surface methodology (RSM) for the recovery process with three significant process variables. Results showed that almost 70% of nanosilver was ionized in the wash water. The most stable emulsion was observed at 3% w/v of Span 80, 150 rpm of agitation speed, 10,000 rpm of homogenizer speed and 5 minutes of emulsification and extraction time. Besides, almost 100% of ionized nanosilver was successfully extracted and the optimum conditions obtained for the recovery process using RSM were 0.256 treat ratio, 0.75 M sulphuric acid concentration and 0.85 M thiourea concentration. At this optimum condition, the maximum recovery of the ionized nanosilver was 84.74%. Thus, emulsion liquid membrane (ELM) method has a great potential in order to treat wash water containing ionized nanosilver.
format	Thesis
qualification_level	Master's degree
author	Raja Sulaiman, Raja Norimie
author_facet	Raja Sulaiman, Raja Norimie
author_sort	Raja Sulaiman, Raja Norimie
title	Removal of ionized nanosilver from wash water using emulsion liquid membrane process
title_short	Removal of ionized nanosilver from wash water using emulsion liquid membrane process
title_full	Removal of ionized nanosilver from wash water using emulsion liquid membrane process
title_fullStr	Removal of ionized nanosilver from wash water using emulsion liquid membrane process
title_full_unstemmed	Removal of ionized nanosilver from wash water using emulsion liquid membrane process
title_sort	removal of ionized nanosilver from wash water using emulsion liquid membrane process
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical Engineering
granting_department	Faculty of Chemical Engineering
publishDate	2014
url	http://eprints.utm.my/id/eprint/53725/25/RajaNorimieRajaSulaimanMFCHe2014.pdf
_version_	1747817621657485312

Removal of ionized nanosilver from wash water using emulsion liquid membrane process

Similar Items