Investigation of Removal of N-nitrosamines and their Precursors in Water Treatments using Activated Carbon Nanoparticles

Abstract

N-nitrosamines have been detected in various water types. A strategy for removal of this group of compounds should be taken to reduce the health risks for humans. In this study, a fast and sensitive LC-MS/MS method was developed for quantitative analysis of nine N-nitrosamines and four precursors in a single sample. The Method Detection Limits (MDLs) in natural water ranged from 0.05 µg/L to 5 µg/L without using SPE pre-concentration. Three different types of activated carbon nanoparticles (NPs) (bamboo, charcoal and coconut shell as raw materials) were used to carry out removal experiments in two different pHs (pH 6.6 and 8.6). The results indicated that coconut shell-based activated carbon NPs had higher removal efficiency than the other two with a typical dosage of activated carbon NPs, at a typical contact time of 4 hours. No significant differences in removal efficiency between the two selected pH values were observed.

Department(s)

Chemistry

Second Department

Civil, Architectural and Environmental Engineering

Keywords and Phrases

Activated Carbon Nanoparticles; Liquid Chromatography-tandem Mass Spectrometry; N-nitrosamines; Nitrosamine Precursors; Carbon Nano Particles; Coconut Shells; Contact Time; LC-MS/MS; Method Detection Limits; Natural Waters; PH Value; Pre-concentration; Removal Efficiencies; Single Sample; Water Types; Charcoal; Liquid Chromatography; Mass Spectrometry; Nanoparticles; Nitrosamines; Activated Carbon; concentration (Composition); Health Risk; Organic Compound; Particulate Matter; PH; Pollutant Removal; Spectrometry; Water Treatment

International Standard Serial Number (ISSN)

1466-2132

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2013 Inderscience, All rights reserved.

Publication Date

01 Jan 2013

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