NOM Rejection By, and Fouling Of, NF and UF Membranes

NOM Rejection By, and Fouling Of, NF and UF Membranes
Author: Gary L. Amy
Publisher: American Water Works Association
Total Pages: 412
Release: 2001
Genre: Nanofiltration
ISBN: 1583211063

"The performance of spiral-wound nanofiltration (NF) and ultrafiltration (UF) membranes was investigated in terms of natural organic matter (NOM) rejection and associated NOM fouling. This study focused on (1) demonstrating the effects of both hydrophobic and electrostatic interactions between NOM components and the membrane surface, (2) determining influential factors (water quality and operational) in NOM rejection and flux decline, (3) determining major foulant components of NOM, and (4) developing NOM-rejection prediction equations and flux-decline (NOM adsorption) models." -- Executive summary.

Treatability of Perchlorate-Containing Water by RO, NF and UF Membranes

Treatability of Perchlorate-Containing Water by RO, NF and UF Membranes
Author: Gary Amy
Publisher: IWA Publishing
Total Pages: 248
Release: 2004-01-01
Genre: Science
ISBN: 1843398621

The California Department of Health Services has established a provisional action level of 4 ug/L for perchlorate in drinking water due to its toxicity. There are 14 states in the United States that have thus far confirmed perchlorate in ground or surface waters. Ongoing research is investigating other treatment technologies for perchlorate rejection, including biological degradation, ion exchange, and activated carbon. The major objectives of this project were to: determine the removal/rejection of perchlorate (ClO4-) ion by high pressure membranes, including reverse osmosis (RO), nanofiltration (NF), and tight ultrafiltration (UF); evaluate the effects of water quality parameters, pH, ionic strength (conductivity), and co-ions and counter-ions, on process performance; and study membrane operating conditions (e.g., recovery) on perchlorate rejection and potential scaling. Water quality is a determining factor in applying high pressure membranes to perchlorate rejection. Effective rejection of perchlorate by RO, NF, and tight UF has been demonstrated according to two rejection mechanisms: steric (size) versus electrostatic (charge) exclusion. Based on its size (hydrodynamic radius), perchlorate is selectively rejected over chloride through size exclusion; however, based on charge exclusion, sulfate is selectively rejected over perchlorate. 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

Integration of Membrane Filtration Into Water Treatment Systems

Integration of Membrane Filtration Into Water Treatment Systems
Author: Jonathan R. Pressdee
Publisher: American Water Works Association
Total Pages: 312
Release: 2006
Genre: Science
ISBN: 1583214429

Proceedings of the 2006 AWWA Annual Conference and Exposition held June 2006 in San Antonio TX CD-ROM provides current information on all aspects of drinking water Topics include water quality water resources and conservation water utility security water utility vulnerability assessments conventional and advanced water treatment desalination water reclamation and reuse water transmission and distribution system infrastructure water utility management water plant operations privatization and competition automation regulations benchmarking

Recent Advances in Water and Wastewater Treatment with Emphasis in Membrane Treatment Operations

Recent Advances in Water and Wastewater Treatment with Emphasis in Membrane Treatment Operations
Author: Anastasios I. Zouboulis
Publisher: MDPI
Total Pages: 232
Release: 2019-04-02
Genre: Technology & Engineering
ISBN: 3038976245

The present Special Issue brings together recent research findings from renowned scientists in the field of water treatment and assembled contributions on advanced technologies applied to the treatment of wastewater and drinking water, with emphasis on novel membrane treatment technologies. 12 research contributions have highlighted various processes and technologies, which can achieve effective treatment and purification of wastewater and of drinking water, aiming (occasionally) for water reuse. The main topics which are analyzed are the use of novel type membranes in bioreactors, the use of modified membranes, for example using vacuum membrane distillation, the fouling of membranes, the problem of arsenic, antimony and chromium contamination in groundwaters and its removal and the use of novel technologies for more efficient ozonation.

Comprehensive Water Quality and Purification

Comprehensive Water Quality and Purification
Author:
Publisher: Elsevier
Total Pages: 1537
Release: 2013-09-24
Genre: Technology & Engineering
ISBN: 0123821835

Comprehensive Water Quality and Purification, Four Volume Set provides a rich source of methods for analyzing water to assure its safety from natural and deliberate contaminants, including those that are added because of carelessness of human endeavors. Human development has great impact on water quality, and new contaminants are emerging every day. The issues of sampling for water analysis, regulatory considerations, and forensics in water quality and purity investigations are covered in detail. Microbial as well as chemical contaminations from inorganic compounds, radionuclides, volatile and semivolatile compounds, disinfectants, herbicides, and pharmaceuticals, including endocrine disruptors, are treated extensively. Researchers must be aware of all sources of contamination and know how to prescribe techniques for removing them from our water supply. Unlike other works published to date that concentrate on issues of water supply, water resource management, hydrology, and water use by industry, this work is more tightly focused on the monitoring and improvement of the quality of existing water supplies and the recovery of wastewater via new and standard separation techniques Using analytical chemistry methods, offers remediation advice on pollutants and contaminants in addition to providing the critical identification perspective The players in the global boom of water purification are numerous and varied. Having worked extensively in academia and industry, the Editor-in-Chief has been careful about constructing a work for a shared audience and cause

Organic geochemistry of natural waters

Organic geochemistry of natural waters
Author: E.M. Thurman
Publisher: Springer Science & Business Media
Total Pages: 524
Release: 1985-04-30
Genre: Science
ISBN: 9789024731435

This book is written as a reference on organic substances in natural waters and as a supplementary text for graduate students in water chemistry. The chapters address five topics: amount, origin, nature, geochemistry, and characterization of organic carbon. Of these topics, the main themes are the amount and nature of dissolved organic carbon in natural waters (mainly fresh water, although seawater is briefly discussed). It is hoped that the reader is familiar with organic chemistry, but it is not necessary. The first part of the book is a general overview of the amount and general nature of dissolved organic carbon. Over the past 10 years there has been an exponential increase in knowledge on organic substances in water, which is the result of money directed toward the research of organic compounds, of new methods of analysis (such as gas chromatography and mass spectrometry), and most importantly, the result of more people working in this field. Because of this exponential increase in knowledge, there is a need to pull together and summarize the data that has accumulated from many disciplines over the last decade.

Book of Abstracts

Book of Abstracts
Author: Institution of Chemical Engineers, The
Publisher:
Total Pages: 620
Release: 2005
Genre: Technology & Engineering
ISBN:

CD-ROM contains conference manuscripts.