SPE of Phenols on New Amine - Based Copolymers

Porous microspheres, copolymers: bis [4(2-hydroxy-3-methacryloyloxypropoxy)-phenysulfide (BES.DM) and glycidyl methacrylate (GMA) have been prepared by suspension-emulsion polymerization. The copolymer (BES.DM+GMA) including reactive epoxide rings was modified with three amines: butylenediamine (BDA), diethylenetriamine (DETA), triethylenetetramine (TETA). Next, attachment of HCO3- species to the primary amine groups took place.The prepared porous polymers were used as adsorbents in off-line SPE experiments. A mixture of phenol (PH), 2-chlorophenol (ChP), 2,4-dichlorophenol (DChP) and 2,4,6-trichlorophenol (TChP) as testing compounds was applied.Depending on the way of chemical modification, the prepared adsorbents possessed diverse sorption properties towards the testing compounds. Competition of the phenolic compounds for active sites presented on the polymer surface was observed. The most effective in water purification process were polymers possessing both amine and bicarbonate groups. The best recovery results were obtained for 2,4-dichlorophenol.

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Chemical Modification of Polysulfones II: An Efficient Method for Introducing Primary Amine Groups onto the Aromatic Chain

Macromolecules ◽

10.1021/ma00127a005 ◽

1995 ◽

Vol 28 (23) ◽

pp. 7612-7621 ◽

Cited By ~ 58

Author(s):

Michael D. Guiver ◽

Gilles P. Robertson ◽

Stephen Foley

Keyword(s):

Chemical Modification ◽

Efficient Method ◽

Primary Amine ◽

Amine Groups

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Modernization of technological equipment in the waste water purification process behind the coke oven using the organic Rankine cycle

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1064/1/012032 ◽

2021 ◽

Vol 1064 (1) ◽

pp. 012032

Author(s):

A N Shishkov ◽

K V Osintsev

Keyword(s):

Waste Water ◽

Water Purification ◽

Organic Rankine Cycle ◽

Rankine Cycle ◽

Coke Oven ◽

Technological Equipment ◽

Purification Process

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Effect of H2O-Based Low-Pressure Plasma (LPP) Treatment on the Germination of Bambara Groundnut Seeds

Agronomy ◽

10.3390/agronomy11020338 ◽

2021 ◽

Vol 11 (2) ◽

pp. 338

Author(s):

Naeem Ahmed ◽

Asad Masood ◽

Kim S. Siow ◽

M. F. Mohd Razip Wee ◽

Rahmat Zaki Auliya ◽

...

Keyword(s):

Food Security ◽

Seed Germination ◽

Chemical Modification ◽

Low Pressure ◽

Germination Percentage ◽

Bambara Groundnut ◽

Pressure Plasma ◽

Low Pressure Plasma ◽

Amine Groups

In general, seed germination is improved by low-pressure plasma (LPP) treatment using precursors such as air, nitrogen, argon, or water (H2O). Here, H2O-based LPP treatment using the optimized parameters of 10 W and 10 s improves the germination of Bambara groundnut seeds by 22%. LPP increases the wettability and roughness of the seed hilum while oxidizing the surface with carboxyl and amine groups. In this H2O-based treatment of Bambara groundnut seeds, combinatory etching and chemical modification facilitated the imbibition process and increased the germination percentage. The success of this method has the potential to be scaled up to solve food security with seeds otherwise facing germination-related issues.

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