Naslov
Morphology and Structure of Calcium Dodecylbenzenesulphonate Under the Influence of Natural Sea Water
(Morphology and Structure of calcium Dodecylbenzenesulphonate Under the Influence of Natural Sea Water)

Autori
Galešić, Mirna ; Težak, Đurđica ; Tudja, Marijan

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
BOOK OF ABSTRACTS : 12th Conference of the European Colloid and Interface Society, Dubrovnik-Cavtat, Croatia / Težak, Đurđica - Zagreb : Prirodoslovno-matematički fakultet Sveučilišta u Zagrebu, 1998

Skup
12th Conference of the European Colloid and Interface Society

Mjesto i datum
Cavtat, Hrvatska; Dubrovnik, Hrvatska, 20.09.1998. - 25.09.1998

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Morphology; Sea-water

Sažetak
Cadmium dodecylbenzenesulphonate [Cd(DBS)2] precipitates from water solutions both in the crystal form and as liquid crystalline phase. In the sea water of different salinity the precipitation synergistic effect takes place. The precipitation reactions include the anionic and cationic macro constituents of the sea water and dodecylbenzenesulphonic acid. The chemical composition and the structure of mixed crystals and liquid crystalline phases have been determined in the solution of the sea water by using the qualitative and quantitative analysis of chemical elements on scanning electron microscope. The concentration of sea water is expressed by the chloride ion [Cl-] = 10-2 mol dm-3. A good agreement of the results achieved by the complexometric analysis, atomic absorption, X-ray diffraction, as well as, thermogravimetric analysis, was found. These methods showed that cadmium partly was included into the lamellar bilayers, and it was partly crystallized within the liquid crystal matrix in the form of Cd(DBS)2 and CdCl2. It can be assumed that some amount of cadmium has been adsorbed at negatively charged surface of the surfactant micelles. These investigations present an approach to the application of precipitation processes before filtering the waste waters; the extraction of heavy metals can be promoted with surface-active agents.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Biologija

POVEZANOST RADA