Characterization of natural Yemeni zeolites as powder sorbents for ammonium valorization from domestic waste water streams using high rate activated sludge processes [PDF]
, 2018 BACKGROUND In this study three natural Yemeni zeolites (NZ1, NZ2 and NZ3) having major minerals such as clinoptilolite and mordenite, were evaluated as low cost sorbents for the removal and recovery of ammonium ions.
Alouani, Rabeh +4 more
core +2 more sources
Analysis and control of acid sites in zeolites
Applied Catalysis A: General, 2020 The exceptional catalytic performance of zeolites is due to the presence of active sites in a shape-selective environment, i.e., in micropores with molecular dimensions.
Ana Palčić, V. Valtchev
semanticscholar +1 more source
Natural vs. Synthetic Zeolites
, 2020 This brief review article describes the structure, properties and applications of natural and synthetic zeolites, with particular emphasis on zeolites obtained from natural or waste materials. Certainly, such short work does not exhaust the complexity of
M. Krol
semanticscholar +1 more source
Confinement effects and acid strength in zeolites
Nature Communications, 2020 Chemical reactivity and sorption in zeolites are coupled to confinement and—to a lesser extent—to the acid strength of Brønsted acid sites (BAS). In presence of water the zeolite Brønsted acid sites eventually convert into hydronium ions.
E. Grifoni +5 more
semanticscholar +1 more source
Separation and Purification Technology, 2020 High-silica zeolites can be used for adsorption of organic compounds (OCs) from water. The adsorption efficacy could vary with the properties of OCs, as well as the porous and surface features of high-silica zeolites.
N. Jiang +3 more
semanticscholar +1 more source
Impact of Controlling the Site Distribution of Al Atoms on Catalytic Properties in Ferrierite-Type Zeolites [PDF]
, 2011 Zeolites with the ferrierite (FER) topology are synthesized using a combination of tetramethylammonium (TMA) cations with differently sized cyclic amines (pyrrolidine (Pyr), hexamethyleneimine (HMI), and 1,4- diazabicyclo[2.2.2]octane (DAB)).
Bhan A. +27 more
core +3 more sources
Simultaneous ammonium and phosphate recovery and stabilization from urban sewage sludge anaerobic digestates using reactive sorbents [PDF]
, 2018 The use of low-cost inorganic sorbents as a new sustainable strategy to enhance the valorization of nutrients (N-P-K), from the urban water cycle (e.g., side streams from sewage sludge anaerobic digestion), in agriculture applications is presented.
Batis, Narjes +7 more
core +2 more sources
EXAFS Analysis of Size-Constrained Semiconducting Materials [PDF]
, 1990 Semiconducting materials such as CdSe, CdS, PbS and GaP are included in crystalline zeolite Y and mordenite and structurally flexible ethylene-methacrylic acid copolymer solid matrices.
Bein, Thomas +5 more
core +1 more source
High-silica zeolites for adsorption of organic micro-pollutants in water treatment: A review.
Water Research, 2018 High-silica zeolites have been found to be effective adsorbents for the removal of organic micro-pollutants (OMPs) from impaired water, including various pharmaceuticals, personal care products, industrial chemicals, etc.
N. Jiang +3 more
semanticscholar +1 more source
The use of ozone and high silica zeolites to enhance refractory compounds removal [PDF]
, 2007 This work investigates the removal of organic pollutants from water through a three-phase process combining adsorption onto hydrophobic zeolites and in situ oxidation by ozone gas.
Debellefontaine, Hubert +3 more
core