Removal of Organic Contaminants from Water Using Microporous Hollow Fiber Membranes PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Removal of Organic Contaminants from Water Using Microporous Hollow Fiber Membranes PDF full book. Access full book title Removal of Organic Contaminants from Water Using Microporous Hollow Fiber Membranes by Amy Karen Zander. Download full books in PDF and EPUB format.
Author: Amy Karen Zander
Publisher:
ISBN:
Category :
Languages : en
Pages : 370
Get Book Here
Book Description
Author: Amy Karen Zander
Publisher:
ISBN:
Category :
Languages : en
Pages : 370
Get Book Here
Book Description
Author: Shamsul Abedin Tarafder
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Author: Hassan Mahmud
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Removal and recovery of volatile organic compounds (VOCs) from industrial wastewater and groundwater has become increasingly important due to stringent environmental regulations. Membrane air-stripping (MAS), using microporous polypropylene hollow fiber membrane modules, is one of the most promising processes for this purpose. The mass transfer of water and VOCs in MAS was studied using such a module, with air-flow on the lumen side and liquid cross-flow on the shell side. Chloroform, toluene and their mixture were used as model VOCs. Water transport experiments showed that mass transport was significantly decreased when the membrane had been in contact with water for prolonged periods. It was hypothesized the increased mass transfer resistance was due to water condensation in a fraction of the membrane pores. MAS of chloroform from aqueous solutions confirmed the additional mass transfer resistance with prior exposure to water. It was concluded that membrane pores were completely air-filled at the start and became partially wetted with water after prolonged period during the MAS process. The currently existing models are able to predict the performance only for either completely air-filled or liquid-filled pores. A modification of an existing model was proposed to take into account diffusion through the partially water-filled pores, as well as the partially air-filled pores. It was found that the model predictions agreed well with the experimental data. This hypothesis also provided a plausible explanation for the conflicting literature values of the membrane mass transfer resistance. It was also found that the membrane mass transfer resistance of the partially water-filled pores was two orders of magnitude higher than that of air-filled pores. Leveque's (1928) correlation overestimates the local mass transfer coefficient in a cylindrical tube at low velocities. A modification of this correlation has been proposed to predict the local air film mass transfer coefficient at low air velocities. The proposed correlation predictions matches well with the experimental data. The overall mass transfer coefficients of chloroform obtained in this work for liquid cross-flow on the shell side were up to twice as high as those reported in the literature, even though our experiments were carried out at much lower water and air velocities. However, the air pressure drop on the lumen side was significantly higher than that for system with air flow on the shell side. The overall mass transfer coefficients did not change when the initial chloroform concentration in the feed ranged from 81 to 908 ppm. MAS process was found effective in concentrating chloroform to more than 90% from a feed aqueous solution of ppm levels. The adsorption of toluene had strong detrimental impact on the performance of the polypropylene hollow fiber module. It is hypothesized that the toluene sorption resulted in swelling of the polypropylene fibers causing a reduction of the effective pore diameter and as a result of this, the toluene transport was substantially lower than expected. Due to this effect, the presence of toluene in the binary aqueous solution with chloroform significantly reduced the mass transport of chloroform compared to that with only chloroform. Henry's law constants were determined for individual chloroform and toluene as well as for their mixtures at 23°C and are reported. The effect of initial chloroform concentrations on Henry's law constant was experimentally examined.
Author: Amy K. Zander
Publisher: American Water Works Association
ISBN: 0898678633
Category : Strippers (Chemical technology)
Languages : en
Pages : 100
Get Book Here
Book Description
Author: Lyonnaise des eaux-Dumez (Firm)
Publisher: American Water Works Association
ISBN: 0070015597
Category : Water
Languages : en
Pages : 738
Get Book Here
Book Description
With global demand for water in the 20th century expected to increase ten-fold, this work focuses on the membrane filtration issues for drinking water.
Author: Anil Kumar Pabby
Publisher: CRC Press
ISBN: 1420009486
Category : Science
Languages : en
Pages : 1210
Get Book Here
Book Description
The Handbook of Membrane Separations: Chemical, Pharmaceutical, and Biotechnological Applications provides detailed information on membrane separation technologies as they have evolved over the past decades. To provide a basic understanding of membrane technology, this book documents the developments dealing with these technologies. It explo
Author: Xiaoqin Zou
Publisher: John Wiley & Sons
ISBN: 3527344063
Category : Technology & Engineering
Languages : en
Pages : 472
Get Book Here
Book Description
A guide to membrane separation based on a variety of porous materials with promising separation applications Microporous Materials for Separation Membranes offers an in-depth guide that explores microporous materials? potential for membrane applications. The authors?two experts on the topic?examine a wide range of porous materials that have application potential including: microporous silica, porous carbons, zeolites, metal-organic frameworks (MOFs), and porous organic frameworks (POFs). Comprehensive in scope, the book covers a broad range of topics on membrane separations such as: hydrogen recovery, carbon dioxide capture, air purification, hydrocarbon separation, pervaporation, and water treatment. In addition, this up-to-date resource explores the most recent materials for preparing microporous membranes and explores the most promising applications for industrial use. This important book: -Examines the use of microporous materials as membranes to perform with different gases and liquids -Offers an overview of the basic knowledge of membrane separation and an intense examination of separations -Describes the state-of-the-art of membrane separation with porous materials -Highlights the most promising applications of industrial interest Written for scientists working in the fields of membranes, gas and liquid, Microporous Materials for Separation Membranes offers a valuable guide to the potential of microporous materials for membrane applications.
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 962
Get Book Here
Book Description
Author: New England Water Works Association
Publisher:
ISBN:
Category : Water-supply
Languages : en
Pages : 460
Get Book Here
Book Description
Author: Anil K. Pabby
Publisher: CRC Press
ISBN: 0429677456
Category : Science
Languages : en
Pages : 325
Get Book Here
Book Description
This book on hollow fiber contractors presents an up-to-date compilation of the latest developments and milestones in this membrane technology. Hollow Fiber Membrane Contactors: Module Fabrication, Design and Operation, and Potential Applications provides a comprehensive discussion of hollow fiber membrane applications (including a few case studies) in biotechnology, chemical, food, and nuclear engineering. The chapters in this book have been classified using the following, based on different ways of contacting fluids with each other: Gas-liquid contacting; Liquid-liquid contacting; Supported liquid membrane; Supported gas membrane; Fluid-fluid contacting. Other features include: Discusses using non-dispersive solvent extraction, hollow fiber strip dispersion, hollow fiber supported liquid membranes and role of process intensification in integrated use of these processes Provides technical and economic perspectives with several case studies related to specific scenarios Demonstrates module fabrication, design, operation and maintenance of hollow fiber contactors for different applications and performance Presents discussion on newer concepts like membrane emulsification, membrane nanoprecipitation, membrane crystallization and membrane condenser Special focus on emerging areas such as the use of hollow fiber contactor in back end of nuclear fuel cycle, membrane distillation, dehumidification of air and gas absorption and stripping Discusses theoretical analysis including computational modeling of different hollow fiber membrane processes, and presents emphasis on newly developed area of hollow fiber membrane based analytical techniques Presents discussion on upcoming area dealing with hollow fiber contactors-based technology in fermentation and enzymatic transformation and in chiral separations This book is equally suited for newcomers to the field, as well as for engineers and scientists that have basic knowledge in this field but are interested in obtaining more information about specific future applications.
