« Previous AbstractOverview of the Lake Michigan Ozone Study 2017    Next AbstractPlant-mediated pheromone emission by a hemipteran seed feeder increases the apparency of an unreliable but rewarding host »

Front Chem

Title:		"Utilisation of waste Cu-, Mn- and Fe-loaded zeolites generated after wastewater treatment as catalysts for air treatment"
Author(s):		Stankovic M; Popova M; Mazaj M; Drazic G; Suligoj A; Van de Velde N; Opresnik M; Jacimovic Z; Tusar NN; Logar NZ;
Address:		"Faculty of Metallurgy and Technology, University of Montenegro, Podgorica, Montenegro. Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria. Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Ljubljana, Slovenia. Department of Materials Chemistry, National Institute of Chemistry, Ljubljana, Slovenia. Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia. Graduate School, University of Nova Gorica, Nova Gorica, Slovenia"
Journal Title:		Front Chem
Year:		2022
Volume:		20221202
Issue:
Page Number:		1039716 -
DOI:		10.3389/fchem.2022.1039716
ISSN/ISBN:		2296-2646 (Print) 2296-2646 (Electronic) 2296-2646 (Linking)
Abstract:		"Disposal of copper, manganese and iron is particularly problematic in wastewater of metallurgical and galvanization plants, the electronics industry and agriculture. On the other hand, volatile organic compounds (VOCs), emitted from industrial processes, transportation and consumer products are the main class of air pollutants. The study revealed the potential of waste metal-loaded zeolite, generated through wastewater treatment procedures, to be utilised as an effective VOC removal catalyst for air treatment. In the first step, we have evaluated the sorption performance of natural zeolite clinoptilolite (HEU type), and synthetic zeolite 4A (LTA type) for the simultaneous removal of Cu(2+), Mn(2+) and Fe(3+) species from aqueous solution. By a detailed sorption study, we determined the optimum sorption conditions and maximum metal concentrations in wastewater that can be after treatment disposed of in rivers or municipal plants. The efficiency of both zeolites for metal immobilization was demonstrated for concentrations up to 5 mg metals/1 g zeolite. These waste Cu-, Mn- and Fe-loaded zeolites were thermally treated at 540 degrees C before the second step, where we evaluated their catalytic performance in removing VOC. The thermally treated waste Cu-, Mn- and Fe-loaded natural zeolite clinoptilolite showed good catalytic performance in total toluene oxidation as a model VOC (conversion rate up to 96% at 510 degrees C) and cycling stability (less than 15% drop in conversion rate in 4 h). In contrast, this is not the case for thermally treated waste Cu-, Mn- and Fe-loaded synthetic zeolite 4A"
Keywords:		VOC removal air treatment clinoptilolite metals removal waste-to-raw material wastewater treatment zeolite 4A;
Notes:		"PubMed-not-MEDLINEStankovic, Mia Popova, Margarita Mazaj, Matjaz Drazic, Goran Suligoj, Andraz Van de Velde, Nigel Opresnik, Mojca Jacimovic, Zeljko Tusar, Natasa Novak Logar, Natasa Zabukovec eng Switzerland 2022/12/20 Front Chem. 2022 Dec 2; 10:1039716. doi: 10.3389/fchem.2022.1039716. eCollection 2022"