東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Synthesis and characterization of no...

Johnson, Billy Ray.

Linked to FindBook

Google Book

Amazon

博客來

Synthesis and characterization of novel anion exchange resin coated single-walled carbon nanotubes for use in water purification.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Synthesis and characterization of novel anion exchange resin coated single-walled carbon nanotubes for use in water purification./
Author:	Johnson, Billy Ray.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
Description:	125 p.
Notes:	Source: Masters Abstracts International, Volume: 55-05.
Contained By:	Masters Abstracts International55-05(E).
Subject:	Organic chemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10139935
ISBN:	9781339954134

Synthesis and characterization of novel anion exchange resin coated single-walled carbon nanotubes for use in water purification.
Johnson, Billy Ray.

Synthesis and characterization of novel anion exchange resin coated single-walled carbon nanotubes for use in water purification. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 125 p.

Source: Masters Abstracts International, Volume: 55-05.

Thesis (M.S.)--The University of North Carolina at Charlotte, 2016.

As human health concerns over disinfection byproducts (DBPs) in drinking water increase, so does the need to development new materials that remove them rapidly and at high-efficiency. Ion exchange (IEX) is an effective method for the removal of natural organic matter (NOM), especially anion exchange resins (AERs) with quaternary ammonium functional groups. However, capacity is limited in existing commercial resin materials because adsorbates can only interact with the outermost surface area, which makes these products inefficient on a mass basis. We have synthesized a novel "NanoResin" exploiting the enhanced NOM removal of the quaternary ammonium resin while utilizing the immense surface area of single-walled carbon nanotubes (SWCNTs), which act as scaffolding for the resin. Our nanomaterials show increased adsorption capacity per gram compared to commercially available adsorbents and reach equilibrium in a fraction of the time. This NanoResin requires only about 10 seconds to reach ion-exchange equilibrium versus more than 30 minutes for commercial resins because kinetics are only limited by diffusion. Using NanoResin as a thin film membrane filter, a NOM surrogate was removed to below its detection limit within 10 seconds of contact. Comparatively, commercial AERs only achieved partial removal after more than 15 minutes. High-capacity adsorption of a low molecular weight (MW) surrogate has been measured. NOM removal was demonstrated in solutions of both low and high specific UV absorbance (SUVA; the absorbance at 254 nm divided by dissolved organic carbon concentration) composition with these nanomaterials. Additionally, the NanoResin showed increased removal over commercial resins with a NOM concentrate sample taken from Myrtle Beach, SC, demonstrating NanoResin is an effective method of removal for refractory NOM in a natural aqueous environment. Synthesis and characterization of the polymers and nanomaterials are presented in the following thesis, along with a thorough description of the atom transfer radical polymerization (ATRP) mechanism. We measured and characterized the adsorption capacity, adsorption kinetics, and the regeneration and reusability of these new materials for surrogate and natural NOM. The open matrix microstructure of this NanoResin precludes any intraparticle diffusion of adsorbates. Therefore the rate of adsorption is limited only by solvent diffusion to the NanoResin surface. Thus, these nanomaterials act as a "contact resin."

ISBN: 9781339954134Subjects--Topical Terms:

523952
Organic chemistry.

Synthesis and characterization of novel anion exchange resin coated single-walled carbon nanotubes for use in water purification.
LDR:03514nmm a2200313 4500 001 2165026
005 20181129115237.5
008 190424s2016 ||||||||||||||||| ||eng d
020 $a 9781339954134
035 $a (MiAaPQ)AAI10139935
035 $a (MiAaPQ)uncc:11168
035 $a AAI10139935
040 $a MiAaPQ $c MiAaPQ
100 1 $a Johnson, Billy Ray. $3 3353090
245 1 0 $a Synthesis and characterization of novel anion exchange resin coated single-walled carbon nanotubes for use in water purification.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 125 p.
500 $a Source: Masters Abstracts International, Volume: 55-05.
500 $a Adviser: Jordan C. Poler.
502 $a Thesis (M.S.)--The University of North Carolina at Charlotte, 2016.
520 $a As human health concerns over disinfection byproducts (DBPs) in drinking water increase, so does the need to development new materials that remove them rapidly and at high-efficiency. Ion exchange (IEX) is an effective method for the removal of natural organic matter (NOM), especially anion exchange resins (AERs) with quaternary ammonium functional groups. However, capacity is limited in existing commercial resin materials because adsorbates can only interact with the outermost surface area, which makes these products inefficient on a mass basis. We have synthesized a novel "NanoResin" exploiting the enhanced NOM removal of the quaternary ammonium resin while utilizing the immense surface area of single-walled carbon nanotubes (SWCNTs), which act as scaffolding for the resin. Our nanomaterials show increased adsorption capacity per gram compared to commercially available adsorbents and reach equilibrium in a fraction of the time. This NanoResin requires only about 10 seconds to reach ion-exchange equilibrium versus more than 30 minutes for commercial resins because kinetics are only limited by diffusion. Using NanoResin as a thin film membrane filter, a NOM surrogate was removed to below its detection limit within 10 seconds of contact. Comparatively, commercial AERs only achieved partial removal after more than 15 minutes. High-capacity adsorption of a low molecular weight (MW) surrogate has been measured. NOM removal was demonstrated in solutions of both low and high specific UV absorbance (SUVA; the absorbance at 254 nm divided by dissolved organic carbon concentration) composition with these nanomaterials. Additionally, the NanoResin showed increased removal over commercial resins with a NOM concentrate sample taken from Myrtle Beach, SC, demonstrating NanoResin is an effective method of removal for refractory NOM in a natural aqueous environment. Synthesis and characterization of the polymers and nanomaterials are presented in the following thesis, along with a thorough description of the atom transfer radical polymerization (ATRP) mechanism. We measured and characterized the adsorption capacity, adsorption kinetics, and the regeneration and reusability of these new materials for surrogate and natural NOM. The open matrix microstructure of this NanoResin precludes any intraparticle diffusion of adsorbates. Therefore the rate of adsorption is limited only by solvent diffusion to the NanoResin surface. Thus, these nanomaterials act as a "contact resin."
590 $a School code: 0694.
650 4 $a Organic chemistry. $3 523952
650 4 $a Materials science. $3 543314
650 4 $a Nanoscience. $3 587832
690 $a 0490
690 $a 0794
690 $a 0565
710 2 $a The University of North Carolina at Charlotte. $b Chemistry. $3 3281163
773 0 $t Masters Abstracts International $g 55-05(E).
790 $a 0694
791 $a M.S.
792 $a 2016
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10139935