نتایج جستجو برای: zeolite nax

تعداد نتایج: 9010  

Journal: :Biomass Conversion and Biorefinery 2022

Abstract Humic acid as a green-sorbent was synthesized from marine sediments. While kaolin modified to nano-zeolite NaX. Different tools such FT-IR, SEM, EDX and XRD were applied confirm the characteristics of generated green-sorbents. factors pH, contact time, sorbent dosage, initial metal ion concentration, temperature interfering ions carefully examined used optimize batch adsorption process...

2018
Joris Goetze Irina Yarulina Jorge Gascon Freek Kapteijn Bert M. Weckhuysen

In small-pore zeolite catalysts, where the size of the pores is limited by eight-ring windows, aromatic hydrocarbon pool molecules that are formed inside the zeolite during the Methanol-to-Olefins (MTO) process cannot exit the pores and are retained inside the catalyst. Hydrocarbon species whose size is comparable to the size of the zeolite cage can cause the zeolite lattice to expand during th...

Journal: :Catalysts 2021

The design of a semiconductor or composite system—with applications in materials science—is complex because its morphology and structure depend on several parameters. These parameters are the precursor type, solvent, pH solution, synthesis approach, shaping agents. This study gives meaningful insight regarding such WO3 materials. By systematically alternating (sodium tungstate dihydrate—NWH, am...

2006
A. Ansari Mahabadi M. A. Hajabbasi H. Khademi H. Kazemian

In recent years, natural substances such as zeolite have been used to absorb heavy metals in soil in an attempt to decrease their availability to plants. Compared to other techniques, the use of zeolite is fast, clean, and inexpensive. This research was carried out to investigate the effects of an Iranian natural zeolite (clinoptilolite) on stabilizing Cd-contaminated soil treated with 0.01 M C...

2018
A. Medina-Ramírez A. A. Flores-Díaz B. Ruiz Camacho G. García-Ruiz

The synthesis of calcium silicate supported zeolite membrane was carried out by second growth method. The chemical nature of the functionalizing agent on the formation of homogenous zeolite membrane was evaluated. One monomer and two cationic polymers were used: 3-aminopropyltriethoxysilane (APS), polyethylenimine (PEI) and polydiallyldimethylammonium chloride (PDDA). The support was subjected ...

2011
James Anthony Ippolito David D. Tarkalson Gary A. Lehrsch

Adoption of new management techniques that improve soil water storage and soil N plant availability yet limit N leaching may help improve environmental quality. A benchtop study was conducted to determine the influence of a single urea fertilizer rate (224 kg N ha) applied with band or fully mixed zeolite (clinoptilolite) application rates (up to 90 Mg ha) on NH4-N and NO3-N concentrations in a...

Journal: :Biological & pharmaceutical bulletin 2010
Yong Jae Shin Chang-Soo Han Chang Seok Lee Hong-Sook Kim Seong-Hee Ko Seung Kyun Hwang Seong-Gyu Ko Jong Wook Shin Sang-Kyu Ye Myung-Hee Chung

Zeolite 4A, synthetic silicate, has been shown to exhibit diverse biological activities such as anti-cancer and anti-oxidant activity. In the present study, we report that the zeolite 4A may improve skin-whitening. We found that zeolite 4A inhibited melanin production in a dose-dependent manner, which has not cytotoxicity. Zeolite 4A also inhibited alpha-melanocyte-stimulating hormone (alpha-MS...

2017
David E. Anderson Srinivasan Balapangu Heidimarie N. A. Fleischer Ruth A. Viade Francis D. Krampa Prosper Kanyong Gordon A. Awandare Elvis K. Tiburu

Temperature-dependent zeolite synthesis has revealed a unique surface morphology, surface area and pore size which influence the immobilization of urease on gold electrode supports for biosensor fabrication. XRD characterization has identified zeolite X (Na) at all crystallization temperatures tested. However, N₂ adsorption and desorption results showed a pore size and pore volume of zeolite X ...

2008
Yi Huang Huanting Wang

A novel confined-space synthesis method has been developed to synthesize zeolite nanocrystals. Colloidal silica nanoparticles serving as the silica source as well as the hard template were embedded in the mesoporous carbon via in situ polymerization of furfuryl alcohol (FA) in the presence of tri-block copolymer (Pluronic P123), and then reacted with an alkaline aqueous solution (Na2O-Al2O3-H2O...

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