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Author: D. N. Nilsen
Publisher:
ISBN:
Category : Copper
Languages : en
Pages : 24
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Book Description
Author: D. N. Nilsen
Publisher:
ISBN:
Category : Copper
Languages : en
Pages : 24
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Book Description
Author: D. N.. Nilsen
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Book Description
Author: D. N. Nilsen
Publisher:
ISBN:
Category : Copper
Languages : en
Pages : 24
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Book Description
Author: Vladimir S Kislik
Publisher: Elsevier
ISBN: 0080932568
Category : Technology & Engineering
Languages : en
Pages : 462
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Book Description
Liquid Membranes: Principles and Applications in Chemical Separations and Wastewater Treatment discusses the principles and applications of the liquid membrane (LM) separation processes in organic and inorganic chemistry, analytical chemistry, biochemistry, biomedical engineering, gas separation, and wastewater treatment. It presents updated, useful, and systematized information on new LM separation technologies, along with new developments in the field. It provides an overview of LMs and LM processes, and it examines the mechanisms and kinetics of carrier-facilitated transport through LMs. It also discusses active transport, driven by oxidation-reduction, catalytic, and bioconversion reactions on the LM interfaces; modifications of supported LMs; bulk aqueous hybrid LM processes with water-soluble carriers; emulsion LMs and their applications; and progress in LM science and engineering. This book will be of value to students and young researchers who are new to separation science and technology, as well as to scientists and engineers involved in the research and development of separation technologies, LM separations, and membrane reactors. Provides comprehensive knowledge-based information on the principles and applications of a variety of liquid membrane separation processes Contains a critical analysis of new technologies published in the last 15 years
Author: Hao Ma
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
"Emulsion liquid membrane (ELM) technique is a modified technique that combines the traditional solvent extraction and stripping in a single unit operation. The characteristics of ELM include the large interfacial area and high selectivity when treating heavy metal ions. Through the study of applying ELM technique in extracting and stripping copper and nickel from single cation bearing solutions, this thesis targets at the extraction and separation of different metal ions including copper, nickel and calcium from a synthetic wastewater stream by using the minimum reagent and energy consumption. A two-stage mixer-settler was eventually built-up and implemented to test the extraction and separation efficiency of ELM.As for copper extraction, the extractant used was LIX 984N, four factors were screened out as important ones: extractant concentration; W/O/W emulsion stirring time; W/O/W emulsion stirring speed; and CuSO4 solution/emulsion volume ratio. The other factors were not important thus they were fixed at constant value. The optimum operating condition of copper extraction is determined to be: CuSO4 solution/primary emulsion volume ratio of 3.2; extractant concentration of 6.7 wt %; H2SO4 concentration of 4.6 mol/L; W/O/W emulsion stirring time of 24 minutes; and W/O/W emulsion stirring speed of 415 rpm (1 rpm = 1/60 Hz=[pi]/30 rad/s). As for nickel extraction, the extractant used was Cyanex 301, the optimum laboratory conditions were: extractant concentration of 7.2 wt %; stripping solution (H2SO4) concentration of 0.5 mol/L; NiSO4 solution pH of 4.5; and NiSO4 solution/emulsion volume ratio of 3.5. A series of comparison tests between ELM technique and traditional solvent extraction technique were performed and the following results were found: The loading capacity tests showed that emulsion phase had a higher nickel extraction capacity (8.128 g Ni (II)/100 g Cyanex 301) than the organic phase (5.240 g Ni (II)/100 g Cyanex 301). The kinetics tests showed that the emulsion phase and the organic phase had a mass transfer coefficient of 2.823 × 10-7 (m/s) and 3.192 × 10-7 (m/s) respectively. After the process optimization and chemical characteristics have been explored for ELM treating copper and nickel ions separately, the selective extraction and separation of copper and nickel from calcium ion in a synthetic wastewater solution mimicking the nickel mine tailings from Sudbury, Ontario was investigated. The solution had a copper concentration of 10 ppm, nickel concentration of 20 ppm; an averaged calcium concentration of 250 ppm and its pH was 4.0. Two stages were implemented. In the first stage, LIX 984N was used as copper extractant, the optimum operating conditions were: extractant concentration of 0.97 wt %, H2SO4 concentration of 0.5 mol/L, W/O/W emulsion stirring time of 22.5 minutes and synthetic solution/emulsion volume ratio of 4.0. The copper removal rate was 96.7% while nickel and calcium removal rate was only 0.9 % and 1.3%; In the second stage, a mixture of LIX 984N and Cyanex 301 at a volume ratio of 1 to 1 was used as extractant, and the optimum operating conditions were: extractant concentration of 6.7 wt %, H2SO4 concentration of 5.7 mol/L, W/O/W emulsion stirring time of 25 minutes and synthetic solution/emulsion volume ratio of 3.5. The nickel removal rate was 99.0% while the calcium removal rate was 0.55%. A two-stage bench-scale mixer-settler proved the process of using ELM to extract and separate these metal ions was successful under these optimum conditions obtained." --
Author: Mohamed Nageeb Rashed
Publisher: BoD – Books on Demand
ISBN: 183962969X
Category : Science
Languages : en
Pages : 234
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Book Description
Colloids are submicron particles that are ubiquitous in both natural and industrial products. Colloids and colloidal systems play a significant role in human health as well as commercial and industrial situations. Colloids have important applications in medicine, sewage disposal, water purification, mining, photography, electroplating, agriculture, and more.This book gathers recent research from experts in the field of colloids and discusses several aspects of colloid morphology, synthesis, and applications. The book is divided into three sections that cover different techniques for the synthesis of colloids, the structure, dynamic and stability of colloids, and applications of colloidal particles, respectively.
Author: Richard A. Bartsch
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 440
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Book Description
Reviews a variety of liquid membrane configurations, transport mechanisms, and experimental techniques. Describes separations of metal ions, anionic species, organic molecules, and gas mixtures that involve liquid membrane processes. Provides coverage of theory, including mechanisms, carrier design and synthesis, and applications in chemical separations. Covers a broad range of separation processes, including carbon dioxide from nitrogen, unsaturated hydrocarbons, individual transition and heavy metal cations, selenium from contaminated waters, radiotoxic species from nuclear wastes, and sugars from aqueous solutions. Presents state-of-the-art information for both the novice and practitioner.
Author: Winston Ho
Publisher: Springer Science & Business Media
ISBN: 1461535484
Category : Science
Languages : en
Pages : 957
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Book Description
Membrane processes have wide industrial ap This handbook reviews the published litera plications covering many existing and emerging ture, presents an in-depth description of com uses in the chemical, petrochemical, petroleum, mercialized membrane processes, and gives a state-of-the-art review of new membrane pro environmental, water treatment, pharmaceutic al, medical, food, dairy, beverage, paper, tex cess concepts under development. It is intended tile, and electronic industries. The existing ap to be a single source of underlying principles, membranes, membrane modules, process de plications include: (1) dialysis for the purifica tion of human blood (the artificial kidney), (2) sign, applications, and cost estimates. It is also electrodialysis for the desalination of brackish a first attempt to bridge the gap between the water to produce potable water, (3) reverse theory and practice. osmosis for the desalination of seawater, (4) There are several groups which may benefit ultrafiltration for the concentration of large pro from this handbook. It can be used as educa tein molecules from cheese, casein whey, and tional material for industrial personnel engaged milk, and (5) microfiltration for the sterilization in membrane separations. For scientists and of pharmaceutical and medical products, beer, engineers active in research and development in wine, and soft drinks. Since membrane pro synthetic membranes, it will serve as a single cesses generally have low capital investment, as source of reference for the entire field.
Author:
Publisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 264
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Book Description
