Understanding Production And Regeneration Of Hybrid Fiber Ferric Hydroxide Adsorbents For Arsenic Removal From Drinking Water PDF Download
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Author | : Binod Chaudhary |
Publisher | : |
Total Pages | : 154 |
Release | : 2014 |
Genre | : |
ISBN | : |
Download Understanding Production and Regeneration Of Hybrid Fiber-Ferric Hydroxide Adsorbents For Arsenic Removal From Drinking Water Book in PDF, ePub and Kindle
Drinking water contaminated with arsenic is a worldwide problem, especially in developing nations. The research presented in this dissertation describes two major goals: development of hybrid homopolymer polyacrylonitrile (PAN)-based sorbents for arsenate removal from drinking water and understanding regeneration of arsenate from ferric hydroxide-based adsorbents. The homopolymer PAN fiber was chemically modified to introduce functional groups using NaOH and hydrazine hydrate (HH) separately, or in combination of both. The modified fibers were characterized using Fourier transform infrared spectroscopy (FTIR) and ion exchange measurements. The ferric hydroxides were impregnated onto functionalized fibers using two iron loading procedures. The best arsenate removal performance was obtained using the simplest pretreatment procedure of soaking in 10% NaOH at 95 °C for ninety min, followed by precipitation coating of ferric hydroxide. This suggests that adsorbents based on a low-cost PAN fabric may be produced in developing areas of the world where commercial products may not be available. A density functional theory (DFT) molecular modeling was used to compare free energies of reactions and activation barriers in the formation of arsenate-ferric hydroxide complexes. Slow kinetics associated with arsenate adsorption and desorption attributed to the high activation barriers in forming and breaking bonds with the ferric hydroxides. Another aspect of regeneration study focused on the effects of underlying properties of the ferric hydroxides-loaded adsorbents on arsenate recovery. The arsenate loaded ferric hydroxide adsorbent containing no or weak base functionalities can be regenerated using NaOH, while addition of NaCl to NaOH solution is required for same recovery of arsenate from the adsorbents containing strong base anion exchange functionalities. Moreover, the irreversible fraction of arsenate on the adsorbent can be reduced by increasing the concentration of NaOH. Thus, understanding arsenate desorption kinetics and effects of support properties of ferric hydroxide-based adsorbents are important for environmental fate of arsenate and in designing adsorption systems for removing arsenate from potable water.
Author | : Marek Bryjak |
Publisher | : CRC Press |
Total Pages | : 488 |
Release | : 2016-02-17 |
Genre | : Science |
ISBN | : 1315682605 |
Download Innovative Materials and Methods for Water Treatment Book in PDF, ePub and Kindle
Due to increasing demand for potable and irrigation water, water suppliers have to use alternative resources. They either have to regenerate wastewater or deal with contaminated surface water. This book brings together the experiences of various experts in preparing of innovative materials that are selective for arsenic and chromium removal, and in
Author | : Gary L. Amy |
Publisher | : American Water Works Association |
Total Pages | : 164 |
Release | : 2005 |
Genre | : Nature |
ISBN | : 1583213996 |
Download Adsorbent Treatment Technologies for Arsenic Removal Book in PDF, ePub and Kindle
Accompanying CD-ROM includes Excel document "Arsenic adsorbent design and costing tool".
Author | : M. Feroze Ahmed |
Publisher | : |
Total Pages | : 298 |
Release | : 2001 |
Genre | : Arsenic |
ISBN | : |
Download Technologies for Arsenic Removal from Drinking Water Book in PDF, ePub and Kindle
Includes some papers with reference to Bangladesh and India.
Author | : |
Publisher | : |
Total Pages | : 282 |
Release | : 2007 |
Genre | : Drinking water |
ISBN | : |
Download Arsenic Removal for Drinking Water in Developing Countries Through the Use of Granular Ferric Hydroxide Media Book in PDF, ePub and Kindle
Author | : Masanori Fujimoto |
Publisher | : |
Total Pages | : 188 |
Release | : 2001 |
Genre | : Carbon |
ISBN | : |
Download The Removal of Arsenic from Drinking Water by Carbon Adsorption Book in PDF, ePub and Kindle
Author | : Muhammad Usman |
Publisher | : |
Total Pages | : |
Release | : 2020 |
Genre | : Arsenic |
ISBN | : |
Download New Applications of Fine-grained Iron Oxyhydroxides as Cost-effective Arsenic Adsorbents in Water Treatment Book in PDF, ePub and Kindle
Author | : Yu-Jung Chang |
Publisher | : American Water Works Association |
Total Pages | : 148 |
Release | : 2004 |
Genre | : Water |
ISBN | : 9781583213100 |
Download Demonstration of Emerging Technologies for Arsenic Removal: Bench-scale testing Book in PDF, ePub and Kindle
This project addresses those technologies deemed most appropriate for small water systems to comply with the Jan '06 USEPA Arsenic Rule Maximum Contaminant Level (MCL). This volume reports on the bench-scale testing of of 4 technologies: ion-exchange processes, sorption kinetics, coupled sorbent-membrane processes and coupled coagulation-ballasted-sedimentation processes. Volume 2 will focus on results of the full-scale demonstration testing.
Author | : Sharoz Kumar Sharma |
Publisher | : CRC Press |
Total Pages | : 220 |
Release | : 2021-05-31 |
Genre | : Technology & Engineering |
ISBN | : 1000448304 |
Download Adsorptive Iron Removal from Groundwater Book in PDF, ePub and Kindle
A pilot study conducted at the Gilze water treatment plant of Water Supply North West Brabant demonstrated that adsorptive filtration has several potential advantages over floc filtration, namely: longer filter runs due to slower head loss development; better filtrate quality; shorter ripening time; and less backwash water use. In existing groundwater treatment plants, the high iron (II) adsorption capacity of the iron oxide coated filter media makes it potentially possible to switch the governing mode of operation from floc filtration to adsorptive filtration. To achieve this two options can be considered: iron (II) adsorption under anoxic conditions followed by oxidation with oxygen-rich water; and adsorption of iron (II) in the presence of oxygen and simultaneous oxidation. The first option might be attractive specifically when two filtration steps are available.
Author | : Samuel D. Faust |
Publisher | : Elsevier |
Total Pages | : 522 |
Release | : 2013-10-22 |
Genre | : Technology & Engineering |
ISBN | : 148316263X |
Download Adsorption Processes for Water Treatment Book in PDF, ePub and Kindle
Adsorption Processes for Water Treatment discusses the application of adsorption in water purification. The book is comprised of 10 chapters that detail the carbon and resin adsorptive processes for potable water treatment. The text first covers the elements of surface chemistry and then proceeds to discussing adsorption models. Chapter 3 tackles the kinetics of adsorption, while Chapter 4 deals with batch systems and fixed fluid beds. Next, the book talks about the physical and chemical properties of carbon. The next two chapters discuss the adsorption of organic compounds and the removal of inorganic compounds, respectively. The eighth chapter presents operational, pilot plant, and case studies. Chapter 9 discusses the biological activated carbon treatment of drinking water, and Chapter 10 covers the adsorption of macroreticular resins. The book will be of great use to both researchers and professionals involved in the research and development of water treatment process.