High grafting density of cyclodextrin polymer for fast removal of aromatic compounds from water

RSC Advances ◽  
2015 ◽  
Vol 5 (59) ◽  
pp. 47998-48004
Author(s):  
Qian Ma ◽  
Xiaoyan Yuan ◽  
Yunhui Zhao ◽  
Lixia Ren
Keyword(s):  
Aqueous Solution ◽  
Water Treatment ◽  
Organic Compounds ◽  
Aromatic Compounds ◽  
Glycidyl Methacrylate ◽  
Sulfonic Acid ◽  
Cyclodextrin Polymer ◽  
Grafting Density ◽  
Dilute Aqueous Solution ◽  
Fast Removal

The synthesized β-cyclodextrin grafted poly(glycidyl methacrylate) shows great potential in water treatment as it can complex with organic compounds such as 1-naphthylamine and 4′-aminoazobenzene-4-sulfonic acid in dilute aqueous solution.

Volatility of amines used for water treatment in steam generating systems

1978 ◽  
Vol 56 (20) ◽  
pp. 2620-2623 ◽  
Author(s):  
Poyilath Varieth Balakrishnan
Keyword(s):  
Aqueous Solution ◽  
Water Treatment ◽  
Concentration Dependence ◽  
Vapour Pressure ◽  
Temperature Range ◽  
Dilute Aqueous Solution ◽  
Water Azeotrope

The relative volatilities of cyclohexylamine and morpholine in dilute aqueous solution have been measured in the temperature range 150 to 300 °C at the corresponding equilibrium vapour pressure of the solution. Cyclohexylamine strongly prefers the steam phase while morpholine has a relatively volatility close to that of water. In both cases an azeotrope of the amine and water, with a vapour pressure higher than that of either component, must exist; however, with morpholine and water azeotrope formation only occurs above 175 °C. The concentration dependence of the distribution between the steam and solution phases of both amines is explained in terms of their partial ionization in solution.

Flame-Resisting Wool with Halo-Organic Compounds

1976 ◽  
Vol 46 (2) ◽  
pp. 100-103 ◽  
Author(s):  
W. J. Thorsen
Keyword(s):  
Organic Compounds ◽  
Flame Retardancy ◽  
Aromatic Compounds ◽  
Sulfonic Acid ◽  
Water Solubility ◽  
Covalent Bonding ◽  
Flame Resistance ◽  
Wool Fabrics ◽  
Reactive Groups ◽  
Acidic Nature

Several aromatic compounds have been synthesized and/or tested for their ability to flame-resist wool. Bromine is incorporated in the molecule to impart flame retardancy, sulfonic acid or other groups for water solubility or emulsifiability in aqueous systems, and nucleophilic or other reactive sites for the subsequent attachment of specialized fiber reactive groups to provide covalent bonding to wool where washfastness is desired. Flame resistance increases as the acidic nature of the molecule increases. Tribromometanilic acid and tetrabromophthalic acid, although not wash-fast, were the most promising of the compounds tested. Tribromometanilic acid is capable of flame-resisting wool fabrics which have been made shrink-resistant with ozone.

To the issue of water treatment by hydrocyclone on the systems of the combined irrigation

2020 ◽  
Vol 0 (2) ◽  
pp. 21-25
Author(s):  
Nikolay Dubenok ◽  
Andrey Novikov ◽  
Sergei Borodychev ◽  
Maria Lamskova
Keyword(s):  
Water Treatment ◽  
Organic Compounds ◽  
Irrigation Water ◽  
Irrigation System ◽  
Petroleum Products ◽  
Cylindrical Part ◽  
Agricultural Landscapes ◽  
Treatment Unit ◽  
Drain Pipe ◽  
Irrigation Network

At the stage of water treatment for irrigation systems, the efficiency capture coarse and fine mechanical impurities, as well as oil products and organic compounds affects the reliability of the equipment of the irrigation network and the safety of energy exchange processes in irrigated agricultural landscapes. The violation of work irrigation system can cause disruptions in irrigation schedules of agricultural crops, crop shortages, degradation phenomena on the soil and ecological tension. For the combined irrigation system, a water treatment unit has been developed, representing a hydrocyclone apparatus with a pipe filter in the case. For the capacity of 250 m3/h the main geometrical dimensions of hydrocyclone have been calculated. To organize the capture petroleum products and organic compounds, it has been proposed a modernization of a hydrocyclone unit, consisting in dividing the cylindrical part of the apparatus into two section. The first is section is for input irrigation water, the second one is for additional drainage of clarified irrigation water after sorption purification by the filter, placed on the disk and installed coaxially with the drain pipe and the pipe filter.

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