Results 31 to 40 of about 3,829 (191)

Quantum Chemical Investigation of Polychlorinated Dibenzodioxins, Dibenzofurans and Biphenyls [PDF]

, 2020
All possible polychlorinated aromatic compounds in the classes of dibenzodioxins (PCDDs), dibenzofurans (PCDFs) and biphenyls (PCBs) were studied by quantum chemical methods of HF/6-311++G(d,p), B3LYP/6-311++G(d,p) and MP2/cc-pVTZ. Calculated stabilities and structures of these compounds were compared with available data on their abundance and toxicity.
Datta, Sopanant, Limpanuparb, Taweetham
openaire   +1 more source

Pollutants Transformation During the Regeneration Process of Fluid Catalytic Cracking Catalysts

Angewandte Chemie, Volume 137, Issue 52, December 22, 2025.
Fluid catalytic cracking is the main pollutant source in crude oil refineries due to spent catalyst regeneration. In this work, flue gas pollutants are monitored and coke deposits are identified. Operando and in situ spectroscopy are developed to explore coke species evolution, coupled with online gas infrared spectroscopy to detect pollutant formation.
Jiawei Bian, Robin Vogel, Pengfei Tian, Shuang Yang, Bohan Wang, Hao Ling, Fuzhen Xuan, Feng Ju, Bert M. Weckhuysen   +8 more
wiley   +2 more sources

Formation Characteristics of PCDD/Fs in the Co-combustion and Pyrolysis Process of Coal and Sewage Sludge

Aerosol and Air Quality Research, 2021
Co-combustion technology of coal and sewage sludge (SS) was encouraged and recommended in China. Previous studies most focused on its influence on combustion characteristics, migration characteristics of heavy metals in fly ash, and emission of ...
Mumin Rao, Xiangbo Zou, Ji Ye, Yunfeng Ma, Tieying Mao, Xiaoqing Lin, Xiaodong Li, Jianhua Yan, Shiwei Qin, Cao Kuang   +9 more
doaj   +1 more source

Dioxins and PCBs in Meat – Still a Matter of Concern?

CHIMIA, 2018
Polychlorinated dibenzodioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) summarized as dioxins, as well as polychlorinated biphenyls (PCBs) are persistent, bio-accumulative and toxic environmental contaminants. Over 95% of human exposure
Markus Zennegg
doaj   +1 more source

Decomposition of two types of electric wires considering the effect of the metal in the production of pollutants [PDF]

, 2013
Combustion runs at 700 °C in a horizontal laboratory furnace were carried out on two different electric wires (PVC and halogen-free wire). Tests were performed in the presence and in the absence of the metal conductor of the wires.
Conesa, Juan A., Egea Ruiz, Silvia, Font, Rafael, Moltó Berenguer, Julia, Ortuño García, Nuria   +4 more
core   +2 more sources

Combined Flue Gas Cleaning from Persistent Organic Compounds and Nitrogen Oxides in the Multifunction Filter

Chemical Engineering Transactions, 2012
Production of new products is associated with the generation of waste that must be processed in some way. Besides recycling, as another opportunity to processing waste, there is the possibility of energetic utilization.
F. Jedlicka, D. Jecha, L. Bébar, J. Oral, P. Stehlík   +4 more
doaj   +1 more source

The Internal Relation between Quantum Chemical Descriptors and Empirical Constants of Polychlorinated Compounds

Molecules, 2018
Quantum chemical descriptors and empirical parameters are two different types of chemical parameters that play the fundamental roles in chemical reactivity and model development.
Jiangchi Fei, Qiming Mao, Lu Peng, Tiantian Ye, Yuan Yang, Shuang Luo   +5 more
doaj   +1 more source

Safety and efficacy of a feed additive consisting of Quillaja saponaria Molina and Yucca schidigera Roezl ex Ortgies (Magni-PHI®) for all poultry species (to slaughter age/weight, or to the point of lay) and ornamental birds (Phibro Animal Health Corporation). [PDF]

EFSA J
Abstract Following a request from the European Commission, EFSA was asked to deliver a scientific opinion on the safety and efficacy of a feed additive consisting of Quillaja saponaria powder and Yucca schidigera powder (Magni‐Phi®) for all avian species (to slaughter age/weight, or to the point of lay) and ornamental birds, as a zootechnical additive (
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP), Bampidis V, Azimonti G, Bastos ML, Christensen H, Durjava M, Dusemund B, Kouba M, López-Alonso M, López Puente S, Marcon F, Mayo B, Pechová A, Petkova M, Ramos F, Villa RE, Woutersen R, Brantom P, Chesson A, Westendorf J, Galobart J, Ortuño J, Manini P, Tarrés-Call J, Vettori MV, Pizzo F.   +25 more
europepmc   +2 more sources

Results of the German Dioxin Measurement Programme At MSW Incinerators [PDF]

, 1992
Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence
Johnke, Bernt, Stelzner, Eckhard
core   +1 more source

Does humic acid foliar application affect growth and nutrient status of water-stressed maize? [PDF]

Plant Environ Interact
Abstract Maize (Zea mays L.) is one of the world's most important crops, but its productivity is at high risk as climate change increases the risk of water stress. Therefore, the development of mitigation strategies to combat water stress in agriculture is fundamental to ensure food security.
Pitann B, Khan K, Mühling KH.
europepmc   +2 more sources