Factors affecting the adsorptive removal of bisphenol A in landfill leachate by high silica Y-type zeolite

2014 ◽  
Vol 22 (4) ◽  
pp. 2788-2799 ◽  
Author(s):  
Xiaoqiang Chen ◽  
Taku Fujiwara ◽  
Shuji Fukahori ◽  
Tomonori Ishigaki
Keyword(s):  
Bisphenol A ◽  
Landfill Leachate ◽  
Factors Affecting ◽  
Adsorptive Removal ◽  
Type Zeolite ◽  
High Silica

scholarly journals Gas Permeation Properties of High-Silica CHA-Type Zeolite Membrane

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 249
Author(s):  
Yasuhisa Hasegawa ◽  
Chie Abe ◽  
Mayumi Natsui ◽  
Ayumi Ikeda
Keyword(s):  
Molecular Size ◽  
Gas Permeation ◽  
Zeolite Membrane ◽  
Type Zeolite ◽  
High Silica ◽  
Separation Of Co2 ◽  
Α Al2o3 ◽  
Separation Performances ◽  
Molecular Sieving ◽  
Permeation Properties

The polycrystalline CHA-type zeolite layer with Si/Al = 18 was formed on the porous α-Al2O3 tube in this study, and the gas permeation properties were determined using single-component H2, CO2, N2, CH4, n-C4H10, and SF6 at 303–473 K. The membrane showed permeation behavior, wherein the permeance reduced with the molecular size, attributed to the effect of molecular sieving. The separation performances were also determined using the equimolar mixtures of N2–SF6, CO2–N2, and CO2–CH4. As a result, the N2/SF6 and CO2/CH4 selectivities were as high as 710 and 240, respectively. However, the CO2/N2 selectivity was only 25. These results propose that the high-silica CHA-type zeolite membrane is suitable for the separation of CO2 from CH4 by the effect of molecular sieving.

Diffusion of phenolic compounds within high-silica MFI-type zeolite in the mesitylene solution

2021 ◽  
Vol 319 ◽  
pp. 111044
Author(s):  
Xinluona Su ◽  
Yuta Nakasaka ◽  
Ren Moriwaki ◽  
Takuya Yoshikawa ◽  
Takao Masuda
Keyword(s):  
Phenolic Compounds ◽  
Type Zeolite ◽  
High Silica

scholarly journals Effects of selection and compiling strategy of substrates in column-type vertical-flow constructed wetlands on the treatment of synthetic landfill leachate containing bisphenol A

2021 ◽  
Author(s):  
Rajani Ghaju Shrestha ◽  
Daisuke Inoue ◽  
Michihiko Ike
Keyword(s):  
Activated Carbon ◽  
Bisphenol A ◽  
Landfill Leachate ◽  
Low Cost ◽  
Oxygen Demand ◽  
Ammonium Nitrogen ◽  
Pollutant Removal ◽  
Vertical Flow ◽  
Batch Mode ◽  
Synthetic Leachate

Abstract A constructed wetland (CW) is a low-cost, eco-friendly, easy-to-maintain, and widely applicable technology for treating various pollutants in the waste landfill leachate. This study determined the effects of the selection and compiling strategy of substrates used in CWs on the treatment performance of a synthetic leachate containing bisphenol A (BPA) as a representative recalcitrant pollutant. We operated five types of lab-scale vertical-flow CWs using only gravel (CW1), a sandwich of gravel with activated carbon (CW2) or brick crumbs (CW3), and two-stage hybrid CWs using gravel in one column and activated carbon (CW4) or brick crumbs (CW5) in another to treat synthetic leachate containing BPA in a 7-d sequential batch mode for 5 weeks. CWs using activated carbon (CW2 and CW4) effectively removed ammonium nitrogen (NH4-N) (99–100%), chemical oxygen demand (COD) (93–100%), and BPA (100%), indicating that the high adsorption capacity of activated carbon was the main mechanism involved in their removal. CW5 also exhibited higher pollutant removal efficiencies (NH4-N: 94–99%, COD: 89–98%, BPA: 89–100%) than single-column CWs (CW1 and CW3) (NH4-N: 76–100%, COD: 84–100%, BPA: 51–100%). This indicates the importance of the compiling strategy along with the selection of an appropriate substrate to improve the pollutant removal capability of CWs.

scholarly journals Factors Affecting Lethality of Bisphenol a on Biomphalaria alexandrina Snails

2016 ◽  
Vol 2 (1) ◽  
pp. 007-013
Author(s):  
SA Mansour ◽  
MFM Soliman ◽  
FAA El Deeb ◽  
NS El-Shenawy
Keyword(s):  
Bisphenol A ◽  
Biomphalaria Alexandrina ◽  
Factors Affecting

scholarly journals Adsorptive Removal of Sulfamethoxazole and Bisphenol A from Contaminated Water using Functionalized Carbonaceous Material Derived from Tea Leaves

2018 ◽  
Vol 6 (4) ◽  
pp. 4215-4225 ◽  
Author(s):  
Md Ariful Ahsan ◽  
Md Tariqul Islam ◽  
Cesar Hernandez ◽  
Hoejin Kim ◽  
Yirong Lin ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Carbonaceous Material ◽  
Contaminated Water ◽  
Tea Leaves ◽  
Adsorptive Removal

scholarly journals Hierarchical Low Si/Al Ratio Ferrierite Zeolite by Sequential Postsynthesis Treatment: Catalytic Assessment in Dehydration Reaction of Methanol

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Enrico Catizzone ◽  
Massimo Migliori ◽  
Alfredo Aloise ◽  
Rossella Lamberti ◽  
Girolamo Giordano
Keyword(s):  
Textural Properties ◽  
Vapour Phase ◽  
Solution Concentration ◽  
Methanol Conversion ◽  
Molar Ratio ◽  
Light Hydrocarbons ◽  
Hierarchical Zeolites ◽  
Type Zeolite ◽  
High Silica ◽  
High Silica Zeolites

In contrast to high silica zeolites, it is difficult to obtain mesoporosity in zeolites with low Si/Al ratio (e.g., <20) via conventional NaOH-based treatment, making the obtainment of hierarchical zeolites with high acidity a challenging target. In this paper, we report the preparation of hierarchical FER-type zeolite at low Si/Al molar ratio (about 10) by postsynthesis etching involving a sequence of three treatments with NaAlO2, HCl, and NaOH solutions and investigate the effect of both NaAlO2 solution concentration and time of treatment on the textural properties. The obtained materials exhibit a mesoporous volume higher than the parent ferrierite with no significant effect on the sample acidity. The catalytic activity of some samples was investigated in vapour-phase methanol dehydration to dimethyl ether, revealing the superiority of hierarchical zeolites in terms of methanol conversion, although the presence of mesopores causes formation of light hydrocarbons at high temperatures.

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