Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/40200
Title: Sorption of oxyanions on nanocrystalline Mg/Al layered double hydroxides : sorption characteristics, mechanisms, and matrix interferences
Authors: Goh, Kok Hui
Keywords: DRNTU::Engineering::Environmental engineering::Water treatment
Issue Date: 2010
Source: Goh, K. H. (2010). Sorption of oxyanions on nanocrystalline Mg/Al layered double hydroxides : sorption characteristics, mechanisms, and matrix interferences. Doctoral thesis, Nanyang Technological University, Singapore.
Abstract: Nanocrystalline Mg/Al layered double hydroxide (LDH) with nitrate intercalation produced in this study exhibited excellent affinity for polyvalent oxyanions, but comparatively less affinity for monovalent oxyhalides. Nanocrystalline LDH was prepared by a fast coprecipitation with subsequent hydrothermal treatment method. The synthesized nanocrystalline LDH possessed mesoporous characteristic with a large surface area and comprised nanocrystalline grains. Interactions of oxyanions (i.e. arsenate, chromate, and vanadate) and oxyhalide (i.e. bromate) with nanocrystalline LDH were studied through stoichiometric calculations, nitrate displacement investigations, comprehensive sorption/desorption experiments, and analyses with several microscopic techniques such as XPS, EXAFS, XRD, FTIR, CHNS/O, and EDX. The influences of co-existing species on the sorption of oxyanions by nanocrystalline LDH were investigated by conducting experiment in the presence of natural organic matter (NOM) and common anions such as nitrate, silica, sulfate, carbonate, and phosphate. Arsenate sorption performances of LDHs prepared by various alternative synthetic routes were also explored and compared with those of LDHs prepared by conventional routes.
URI: https://hdl.handle.net/10356/40200
DOI: 10.32657/10356/40200
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Theses

Files in This Item:
File Description SizeFormat 
GohKokHui2010.pdfReport6.58 MBAdobe PDFThumbnail
View/Open

Page view(s) 20

482
Updated on Jul 28, 2021

Download(s) 5

549
Updated on Jul 28, 2021

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.