› › Alternative Adsorbents For The Removal Of Polar Organic Contaminants

Alternative Adsorbents for the Removal of Polar Organic Contaminants

Author : Detlef R. U. Knappe

Publisher : American Water Works Association

Page : 136 pages

File Size : 20,68 MB

Release : 2007

Category : Drinking water

ISBN : 1583215425

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Book Description

This project studies the application of high-silica zeolites for the removal of polar organic contaminants, i.e., antimicrobial compounds and the fuel additive methyl tertiary-butyl ether (MTBE), from drinking water. Recently published data show that high-silica zeolites, a class of crystalline adsorbents with well defined pore sizes, exhibit considerably larger single-solute MTBE adsorption capacities than activated carbons and carbonaceous resins. The effectiveness of high-silica zeolites is compared to that of activated carbons and a carbonaceous resin.





Removal of Polar and Emerging Organic Contaminants by Alternative Adsorbents

Author :

Publisher :

Page : pages

File Size : 14,69 MB

Release : 2004

Category :

ISBN :

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Book Description

The removal of polar and ionizable organic contaminants from drinking water sources is a challenge for water utilities. Prescription and non-prescription drugs are present at detectable levels in many US surface waters, and conventional water treatment processes do not provide an effective barrier for many emerging contaminants. Therefore, effective treatment technologies are required to successfully remove these contaminants from drinking water. In this study the effectiveness of alternative adsorbents for the removal of MTBE was evaluated. Additionally, adsorbent, adsorbate, and water characteristics that affect ionizable organic contaminant adsorption were identified. In the first phase of this research, the MTBE removal effectiveness of activated carbon, a carbonaceous resin and a silicalite zeolite was compared. Isotherm and short bed adsorber tests were conducted in ultrapure water and river water to obtain parameters describing MTBE adsorption equilibria and kinetics and to quantify the effect of natural organic matter (NOM) on MTBE adsorption. Both the silicalite zeolite and the carbonaceous resin exhibited larger MTBE adsorption uptakes than the tested GAC. Results showed that GAC was the most cost-competitive adsorbent when considering adsorbent usage rate only; however, the useful life of an adsorber containing silicalite zeolite was predicted to be ~5-6 times longer than that of an equally sized adsorber containing GAC. Pilot column results also showed that NOM preloading did not impair the MTBE removal efficiency of the silicalite zeolite. Thus, it may be possible to regenerate spent silicalite with less energy-intensive methods than those required to regenerate GAC. One activated carbon, one carbonaceous resin, and two high-silica zeolites were studied to evaluate their effectiveness for the removal of an emerging pollutant of concern (EPOC) mixture from lake water. Adsorption isotherm experiments were performed with environmentally relevant concentrat.



Effects of Activated Carbon Characteristics on Organic Contaminant Removal

Author : Detlef R. U. Knappe

Publisher : IWA Publishing

Page : 100 pages

File Size : 34,47 MB

Release : 2004-01-01

Category : Science

ISBN : 1843398419

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Book Description

Many water treatment plants need to remove objectionable trace organic compounds, and activated carbon adsorption is often the best available technology. Utilities face the challenge of having to choose from a large variety of activated carbons, and iodine number or BET surface area values are often utilized in the selection process. Although neither parameter correlates well with adsorption capacities, alternative activated carbon selection criteria based on fundamental adsorbent and adsorbate properties are lacking to date. The first objective of this research was to systematically evaluate the effects of activated carbon pore structure and surface chemistry on the adsorption of two common drinking water contaminants: the relatively polar fuel oxygenate methyl tertiary-butyl ether (MTBE) and the relatively nonpolar solvent trichloroethene (TCE). The second objective was to develop simple descriptors of activated carbon characteristics that facilitate the selection of suitable adsorbents for the removal of organic contaminants from drinking water.Originally published by AwwaRF for its subscribers in 2003 This publication can also be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below



Improved Sorptive Removal of Polar Organic Micropollutants from Water Using Surface Modified and Polarized Activated Carbons

Author : Jieying Zhou

Publisher :

Page : pages

File Size : 48,21 MB

Release : 2022

Category :

ISBN :

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Book Description

Emerging organic persistent and mobile (PM) micropollutants can survive the conventional water treatment barriers and end up as hazards in drinking water. Activated carbon (AC) adsorption is one of the prevailing strategies in modern wastewater treatment facilities, which shows satisfying removal ability for non-polar organic compounds, yet not for many highly hydrophilic PM substances. Knowledge in the adsorption drivers for traditional nonpolar organic micropollutants urgently needs to be updated for polar neutral, ionizable andionic compounds taking into account the additional adsorbent/adsorbate interactions. In the scale of this dissertation, we investigated the effect of surface chemical modification (i.e. surface defunctionalization and surface oxidation) and electric polarization of AC felts on the adsorption behaviors of seven environmentally relevant PM contaminants representing polar neutral, cationic and anionic compounds. Surface defunctionalization was found to provide a universal strategy to improve the AC adsorption efficiency for all probed PM types while additional electric polarization can further broaden the flexibility in regulating the uptake and release of charged PM compounds. The electro-assisted ad-/desorption of PM molecules with promising enrichment effects estimated from the batch and flow experiments as well as long-term stability (>20 days, 5 cycles) was proven, which proposes a facile, green, in-situ AC regeneration compared to the state-of-the-art off-site hightemperature regeneration approach. Moreover, we showcased a membrane-free, singlechannel flow unit using two AC electrodes carrying different surface chemistries for an effective removal of highly polar trifluoroacetate from tap water. Our findings shall inspire the next-generation design of adsorbent materials and (electro-)sorptive processes to treat water contaminated by emerging PM substances.



Pharmaceuticals and Personal Care Products: Waste Management and Treatment Technology

Author : Majeti Narasimha Vara Prasad

Publisher : Butterworth-Heinemann

Page : 506 pages

File Size : 32,72 MB

Release : 2019-04-04

Category : Science

ISBN : 0128165901

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Book Description

Pharmaceuticals and Personal Care Products Waste Management and Treatment Technology: Emerging Contaminants and Micro Pollutants provides the tools and techniques for identifying these contaminates and applying the most effective technology for their remediation, recovery and treatment. The consumption of pharmaceuticals and personal care products (PPCPs) has grown significantly over the last 35 years, thus increasing their potential risk to the environment. As PPCPs are very difficult to detect and remove using conventional wastewater treatment methods, this book provides solutions to a growing problem. Includes sampling, analytical and characterization methods and technology for detecting PPCPs in the environment Provides advanced treatment and disposal technologies for the removal of PPCPs from wastewater, surface water, landfills and septic systems Examines the pathways of PPCPs into the environment



Use of Adsorbents for the Removal of Pollutants from Wastewater

Author : Gordon McKay

Publisher : CRC Press

Page : 202 pages

File Size : 32,98 MB

Release : 1995-10-25

Category : Technology & Engineering

ISBN : 9780849369209

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Book Description

Use of Adsorbents for the Removal of Pollutants from Wastewater describes the most commonly occurring industrial effluents, and presents direct means and methodologies for treating them. In addition to its excellent introduction to pollutants, this book contains all of the basics you need for understanding the characteristics and applications of adsorbent materials. With this book, you can choose from a wide variety of traditional and novel adsorbents, including alternative, relatively inexpensive adsorbents.



Air, Gas, and Water Pollution Control Using Industrial and Agricultural Solid Wastes Adsorbents

Author : Tushar Kanti Sen

Publisher : CRC Press

Page : 320 pages

File Size : 29,13 MB

Release : 2017-10-20

Category : Science

ISBN : 1138196851

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Book Description

Air and water pollution occurs when toxic pollutants of varying kinds (organic, inorganic, radioactive and so on) are directly or indirectly discharged into the environment without adequate treatment to remove these potential pollutants. There are a total of 13 book chapters in three sections contributed by significant number of expert authors around the world, aiming to provide scientific knowledge and up-to-date development of various solid wastes based cost-effective adsorbent materials and its sustainable application in the removal of contaminates/pollutants from air, gas and water. This book is useful for the professions, practicing engineers, scientists, researchers, academics and undergraduate and post-graduate students’ interest on this specific area. Key Features: • Exclusive compilation of information on use of industrial and agricultural waste based adsorbents for air and water pollution abatement. • Explores utilization of industrial solid wastes in adsorptive purification and agricultural and agricultural by-products in separation and purification. • Discusses cost-effective solid wastes based emerging adsorbents. • Alternative adsorbents in the removal of a wide range of contaminants and pollutants from water is proposed. • Includes performance of unit operations in waste effluents treatment.



Green Adsorbents for Pollutant Removal

Author : Grégorio Crini

Publisher : Springer

Page : 410 pages

File Size : 47,48 MB

Release : 2018-07-31

Category : Science

ISBN : 3319921622

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Book Description

This is the second volume on adsorption using green adsorbents and is written by international contributors who are the leading experts in the adsorption field. Together with the first volume they show a typical selection of green materials used in wastewater treatment, with emphasis on industrial effluents. This second volume focuses on innovative materials. It presents hemp-based materials for metal removal, and the use of leaves for metal removal. It describes the biosorption of metals and metalloids on various materials and discusses the recent advances in cellulose-based adsorbents used in environmental purposes. Furthermore, activated carbons from food wastes, aerogels and bones, and municipal solid waste biochar as efficient materials for pollutant removal, respectively are reviewed as well as biosorption of dyes onto microbial biosorbents and the use of mushroom biomass to remove pollutants are looked at. The volume also includes detailed review of green adsorbents for removal of antibiotics, pesticides and endocrine disruptors and the use of pillared interlayered clays as innovative materials for pollutant removal. Finally, the use of green adsorbents for radioactive pollutant removal from natural water is discussed. The audience for this book includes students, environmentalists, engineers, water scientists, civil and industrial personnel who wish to specialize in adsorption technology. Academically, this book will be of use to students in chemical and environmental engineering who wish to learn about adsorption and its fundamentals. It has also been compiled for practicing engineers who wish to know about recent developments on adsorbent materials in order to promote further research toward improving and developing newer adsorbents and processes for the efficient removal of pollutants from industrial effluents. It is hoped that the book will serve as a readable and useful presentation not only for undergraduate and postgraduate students but also for the water scientists and engineers and as a convenient reference handbook in the form of numerous recent examples and appended information.



Removal of Organic Contaminants from Water by Using the Polypropylene-based Monoliths

Author : Nadeem Baig

Publisher :

Page : pages

File Size : 27,74 MB

Release : 2017

Category :

ISBN :

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Book Description

Water pollution is putting in danger the human and marine life. One of the major sources of water pollution is the organic contaminants that are being contributed by the rapidly growing industries and the offshore movements of the oil. There is a need to develop such materials that can selectively adsorb these toxic chemicals or filter out from the water. A propylene-based magnetic monolith was synthesized for the static and dynamic separation of non-polar organic contaminants from the water. The polypropylene-based magnetic monolith was obtained by the combination of the polystyrene, polystyrene and magnetic nanoparticles. The developed monolith was characterized by various advance materials such as FTIR, EDX and BET and Raman spectroscopy. The introduction of the magnetic nanoparticles enhances the surface roughness, improves stability and surface area (33 to 221 m2/g). The magnetic behavior of the monolith provides a chance to direct it at a specific position for adsorption of the non-polar organic contaminants. The magnetic polypropylene monolith has displayed a water contact angle of 146u00b0. The absorption capacity was found up to 1517%. A high flux of 13365 Lmu22122hu22121 was found during the separation of the non-polar hydrocarbons from the water.