Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/118812
Title: DEVELOPMENT OF AN INNOVATIVE NANO-SCALE SORBENT FOR TREATMENT OF IONIC CONTAMINANTS IN WATER SOLUTION
Authors: AKM KHORSHED ALAM
Keywords: Nano particles, Arsenic, Fluoride, Heavy metals, Hollow fibre membrane, Chitosan beads
Issue Date: 14-Mar-2014
Source: AKM KHORSHED ALAM (2014-03-14). DEVELOPMENT OF AN INNOVATIVE NANO-SCALE SORBENT FOR TREATMENT OF IONIC CONTAMINANTS IN WATER SOLUTION. ScholarBank@NUS Repository.
Abstract: ARSENIC, FLUORIDE, AND HEAVY METALS IN NATURAL WATER AND INDUSTRIAL WASTEWATER HAVE POSED GREATER ISSUES TO HUMANS. IN THIS STUDY, THREE TYPES OF COST-EFFECTIVE FUNCTIONALIZED MATERIALS NAMELY ZR-MN BINARY METAL COMPOSITE NANO-PARTICLE, ZR-MN NP EMBEDDED HOLLOW FIBER MEMBRANE, AND ZIRCONIUM-FUNCTIONALIZED CHITOSAN BEAD ARE DEVELOPED FOR THE DECONTAMINATION. IT IS DEMONSTRATED THAT THESE MATERIALS CAN EFFECTIVELY REMOVE THE ARSENIC, FLUORIDE, AND HEAVY METALS FROM SIMULATED SURFACE WATER AND GROUNDWATER. THEIR ADSORPTION CAPACITIES ARE GENERALLY MUCH HIGHER THAN MANY REPORTED ADSORPTIVE MATERIALS. SOLUTION PH PLAYS A KEY ROLE IN THE DECONTAMINATION. THE PRESENCE OF COMPETITIVE FACTORS SUCH AS HUMIC SUBSTANCES MAY AFFECT THE REMOVAL WITH CERTAIN DEGREES. XPS AND FTIR STUDIES ILLUSTRATE THE CHEMISTRY FOR THE ADSORPTION MECHANISMS. THE INTRAPARTICLE DIFFUSION MODEL WORKS WELL IN THE DESCRIPTION OF ADSORPTION HISTORY. FINALLY A SERIES OF TOXICITY STUDIES SHOW THAT THE WATER TREATED BY SAI
URI: http://scholarbank.nus.edu.sg/handle/10635/118812
Appears in Collections:Ph.D Theses (Open)

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