Physicochemically modified peat by thermal and oxidation processes as an active material for purification of wastewaters from certain hazardous pollutants/TRESET FIZICKO-HEMIJSKI MODIFIKOVAN TERMALNIM I OKSIDACIONIM PROCESIMA KAO AKTIVNI MATERIJAL ZA PRECISCAVANJE OTPADNIH VODA OD ODREDENIH OPASNIH ZAGADUJUCIH SUPSTANCI

The physicochemical modification of peat through thermal and oxidation processes was carried out, in order to obtain new, inexpensive and active material for purification of different types of waters. During the modification, surface chemical compounds of Shilov type were formed. Batch adsorption pr...

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Published inHemijska industrija Vol. 71; no. 4; p. 299
Main Authors Purenovic, Jelena M, Randelovic, Marjan S, Momcilovic, Milan Z, Purenovic, Milovan M, Stankovic, Novica J, Andelkovic, Ljiljana N
Format Journal Article
LanguageEnglish
Published Association of Chemical Engineers of Serbia 01.07.2017
Subjects
Adsorption
Arsenic
Clathrate compounds
Food contamination
Hydrogen
Oxidation-reduction reactions
Peat
Sulfur compounds
Wastewater
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Summary:The physicochemical modification of peat through thermal and oxidation processes was carried out, in order to obtain new, inexpensive and active material for purification of different types of waters. During the modification, surface chemical compounds of Shilov type were formed. Batch adsorption properties and suitability of physicochemically modified peat (PCMP) for odor removal were tested in aqueous solutions of [H.sub.2]S and colloidal sulphur. Additionally, PCMP was tested in the removal of As(V) which is hazardous ingredient in contaminated waters. Possible mechanisms of pollutants binding include interactions, which lead to formation of adducts and clathrates. All these processes are elucidated in detail. The results showed that the obtained material can be used for the removal of sulphide, colloidal sulphur and As(V) from different types of waters. Keywords: peat, physicochemical modification, surface groups, arsenic, hydrogen sulphide, adsorption-sorption. IZVOD (Naucni rad) Fizicko-hemijska modifikacija treseta putem termalnih i oksidativnih procesa je izvrsena u cilju dobijanja novog, jeftinog i aktivnog materijala za preciscavanje razlicitih vrsta voda. Tokom modifikacije formirana su hemijska povrsinska jedinjenja Silov (Shilov) tipa. Serija adsorpcionih svojstava i podobnost fizicko-hemijski modifikovanog treseta (PCMP) za uklanjanje mirisa je testirana u vodenim rastvorima [H.sub.2]S i koloidnog sumpora. Pored toga, PCMP je testiran u uklanjanju As (V) koji je opasan sastojak u zagadenim vodama. Moguci mehanizmi vezivanja zagadivaca ukljucuju interakcije koje dovode do formiranja adukata i klatrata. Svi ovi procesi su razjasnjeni detaljno. Rezultati su pokazali da dobijeni materijal moze da se koristiti za uklanjanje sulfida, koloidnog sumpora i As (V) iz razlicitih tipova voda. Kljucne reci: Treset * Fizicko-hemijska modifikacija * Povrsinske grupe * Arsen * Vodonik-sulfid * Adsorpcija-sorpcija
ISSN:0367-598X
2217-7426
DOI:10.2298/HEMIND160522040P