White Rose University Consortium logo
University of Leeds logo University of Sheffield logo York University logo

Nanostructured Gel-Phase Materials for Arsenic Removal from Water

Fogarty, Matthew Jack (2019) Nanostructured Gel-Phase Materials for Arsenic Removal from Water. MSc by research thesis, University of York.

This is the latest version of this item.

[img]
Preview
Text
Mattew Jack Fogarty, Thesis of Master by Resarch in Chemistry.pdf - Examined Thesis (PDF)
Available under License Creative Commons Attribution-Noncommercial-No Derivative Works 2.0 UK: England & Wales.

Download (3737Kb) | Preview

Abstract

Arsenic is present naturally in groundwater in many countries around the world; it affects over 140 million people in the world. Consumption of arsenic contaminated water has resulted in arsenic been named by the World Health Organisation (WHO) as one of the top 10 chemicals of public health concern, due to the toxicity of arsenic contaminated drinking water. Current commercial arsenic adsorbents such as activated carbon have low adsorption capacities. In this work, self-assembled cationic C16-DAPMA micelles based on palmitic acid and 3,3′-diamino-N-methyldipropylamine were investigated for interactions with arsenite (As III) and arsenate (As V). The properties of a gelator based on dibenzylidene sorbitol functionalized with hydrazide groups (DBS-CONHNH2) was investigated as a support for the micelles. The embedding of C16-DAPMA micelles into DBS-CONHNH2 hydrogels was investigated to determine whether it was suitable for use as an arsenic removal system. It was found that the C16-DAPMA micelles could bind arsenate through electrostatic interactions, due to the fact that arsenate exists as an anion in water. It was found that at 3.49 mM of arsenate, aggregation between arsenate and C16-DAPMA micelles occurred. It was found that C16-DAPMA micelles could be embedded into DBS-CONHNH2 hydrogels. The presence of C16-DAPMA micelles within DBS-CONHNH2 resulted in stiffer hydrogels, as C16-DAPMA micelles limited the entanglement of the self-spanning network and reduced its flexibility. It was found that C16-DAPMA micelles embedded within the DBS-CONHNH2 hydrogels (with agarose for added stability) were able to reduce the concentration of arsenate from 298 ppb to an estimated value of between 80 to 100 ppb. This work demonstrated that C16-DAPMA micelles embedded within DBS-CONHNH2 hydrogels have potential to be used as an alternative water filtration system due to cheap nature of the materials compared to commercial adsorbents. However, further work is required to prevent leaching of the micelles from the hydrogel network.

Item Type: Thesis (MSc by research)
Academic Units: The University of York > Chemistry (York)
Depositing User: Mr Matthew Jack Fogarty
Date Deposited: 04 Jun 2019 13:37
Last Modified: 04 Jun 2019 13:37
URI: http://etheses.whiterose.ac.uk/id/eprint/23927

Available Versions of this Item

  • Nanostructured Gel-Phase Materials for Arsenic Removal from Water. (deposited 04 Jun 2019 13:37) [Currently Displayed]

You do not need to contact us to get a copy of this thesis. Please use the 'Download' link(s) above to get a copy.
You can contact us about this thesis. If you need to make a general enquiry, please see the Contact us page.

Actions (repository staff only: login required)